THPME —  Poster Session, Messi Area   (19-Jun-14   16:00—18:00)

Paper	Title	Page
THPME001	Commissioning and Operation of the MedAustron Injector: Results and Future Outlook	3202
	L.C. Penescu, M. Kronberger, T. Kulenkampff, F. Osmić, P. Urschütz EBG MedAustron, Wr. Neustadt, Austria W. Pirkl CERN, Geneva, Switzerland
	The MedAustron facility is a synchrotron-driven hadron therapy and research center presently under construction in Wiener Neustadt, Austria. In its final outline, the facility will provide H+ beams with kinetic energies ≤250MeV and C6+ beams of ≤400MeV/u for clinical applications, and for non-clinical applications H+ of up to 800MeV. First patient treatment is foreseen for the end of 2015. The (H3)+ and C4+ beams are generated at 8keV/u in continuous mode by three ECR ion sources and transported to the RFQ for acceleration to 400keV/u. An inter-tank section matches the beam to the entrance of an IH-mode DTL that accelerates the particles to 7MeV/u before they are stripped to, respectively, H+ and C6+, debunched and transported to the injection plane of the synchrotron. At a later stage of the project, beams of other species can be generated with similar optics. This contribution presents the results of the injector commissioning and operation. A comparison with the baseline optics and with the design error studies is given. In addition, an overview on the operational experience is given, with emphasis on the system reliability, stability and reproducibility.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-THPME001
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)
THPME002	Delta-Phi Method for the IFMIF-LIPAc SRF-Linac Cavity Tuning	3205
SUSPSNE041	use link to see paper's listing under its alternate paper code
	M. Valette, N. Chauvin CEA/IRFU, Gif-sur-Yvette, France P.A.P. Nghiem, D. Uriot CEA/DSM/IRFU, France
	In order to achieve the upcoming commissioning of the IFMIF-LIPAc prototype accelerator in Rokkasho, the precision and resolution required for all diagnostics must be determined. These specifications will depend on the precision at which the tuning parameters must be set and finally by the tuning errors that can be tolerated on the beam itself. We will here discuss the use of the ∆φ method to tune the SRF-Linac and the resolution requirements it implies for the BPMs. This method, using a relative time of flight measurement to assess the energy of the beam, has the advantages of allowing setting the beam energy and beam longitudinal focusing at once.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-THPME002
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)
THPME003	A Precise Determination of the Core-halo Limit	3208
	P.A.P. Nghiem, N. Chauvin, D. Uriot, M. Valettepresenter CEA/DSM/IRFU, France W. Simeoni IF-UFRGS, Porto Alegre, Brazil
	For high-intensity beams, the dynamics of the dense core is different from that of the much less dense halo. Relations between core emittance growth and halo generation are often studied, halo scraping often experienced and halo re-formation observed. For all that, a clear distinction between the core and the halo parts does not exist. This paper proposes a new method for precisely determining the core-halo limit applicable to any particle distribution type. Once this limit is known, the importance of the halo relative to the core can be precisely quantified. The core-halo limit determination may be easily extended to the nD phase space, allowing the definition of emittance and Twiss parameters for the core and the halo separately.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-THPME003
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)
THPME004	Further R&D for a New Superconducting CW Heavy Ion Linac@GSI	3211
	W.A. Barth, S. Mickat GSI, Darmstadt, Germany M. Amberg, K. Aulenbacher, V. Gettmann HIM, Mainz, Germany F.D. Dziuba, H. Podlech, U. Ratzinger IAP, Frankfurt am Main, Germany
	A low energy beam line (1.4 MeV/u) behind the GSI High Charge State Injecor will provide cw-heavy ion beams with high beam intensity. It is foreseen to build a new cw-heavy ion-linac for post acceleration up to 7.3 MeV/u. In preparation an advanced R&D program is defined: The first linac section (financed by HIM and partly by HGF-ARD-initiative) comprising a sc CH-cavity embedded by two sc solenoids will be tested in 2014/15 as a demonstrator. After successful testing the construction of an advanced cryomodule comprising four rf cavities is foreseen. As an intermediate step towards an entire cw-linac the use of a double of two CH-cavities is planned: Ashort 5 cell cavity should be mounted directly behind the demonstrator cavity inside a short cryostat. The design of the cw linac based on shorter sc CH-cavities would minimize the overall technical risk and costs. Besides with this cavity an optimized operation of the whole linac especially with respect to beam quality could be achieved. Last but not least the concept of continuous energy variation applying phase variation between the two cavities with constant beta profile could be tested.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-THPME004
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)
THPME005	Optimization of an IH-cavity based High Energy Heavy-ion Linac at GSI	3214
	A. Orzhekhovskaya, G. Clemente, L. Groening, S. Mickat, B. Schlitt GSI, Darmstadt, Germany
	A new high energy heavy-ion injector (HE-Linac) for the FAIR project was proposed as replacement for the existing post-stripper linac at the GSI UNILAC. Six 108 MHz IH-type drift-tube linac cavities within a total length of about 24 m accelerate the ions (up to U28+) from 1.4 MeV/u up to 11.4 MeV/u. Fast pulsed quadrupole triplet lenses are used for transverse focusing in between the IH cavities. The optimization of the HE linac with respect to the emittance growth reduction is investigated.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-THPME005
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)
THPME006	Straight Injection of an intense Uranium Beam into the GSI High Current RFQ	3217
	H. Vormann, A. Adonin, W.A. Barth, L.A. Dahl, P. Gerhard, L. Groening, R. Hollinger, M.T. Maier, S. Mickat, A. Orzhekhovskaya, C. Xiao, S.G. Yaramyshev GSI, Darmstadt, Germany
	A dedicated high current uranium ion source and LEBT will be built at the GSI High Current Injector (HSI), to fulfil the intensity requirements for FAIR (Facility for Antiproton and Ion Research at Darmstadt). This new injection line will be integrated into the existing complex which already comprises two branches. The new LEBT is designed as a straight injection line without dipole magnet, i.e. without dispersive charge state separation. All uranium charge states, coming from the ion source, are transported to the heavy ion high current GSI-HSI-RFQ. Only the design charge state U4+ is accelerated to the final RFQ energy. The new LEBT design is based on beam emittance and current measurements behind the existing ion source. Beam dynamics simulations have been performed with the codes TRACE-3D (envelopes), DYNAMION, BEAMPATH and TRACK (multiparticle). The recent layout of the LEBT, as well as the results of beam dynamics studies are presented.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-THPME006
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)
THPME007	A Virtual Charge State Separator as an Advanced Tool Coupling Measurements and Simulations	3220
	S.G. Yaramyshev, A. Adonin, W.A. Barth, L.A. Dahl, P. Gerhard, L. Groening, R. Hollinger, M.T. Maier, S. Mickat, A. Orzhekhovskaya, H. Vormann GSI, Darmstadt, Germany
	A new Low Energy Beam Transport (LEBT) for multi-charge uranium beam will be built at GSI High Current Injector. All uranium charge states coming from the new ion source will be injected into GSI heavy ion high current HSI-RFQ, but only design ions U4+ will be accelerated to the final RFQ energy. A detailed knowledge about injected beam- current and -emittance for pure design U4+ ions is necessary for a proper beam line design commissioning and operation, while the measurements are possible only for a full beam including all charge states. Detailed measurements of beam current and emittance are performed behind the first quadrupole triplet at the beam line. A dedicated algorithm, based on combination of measurements and results of an advanced beam dynamics simulations, provides for an extraction of beam- current and -emittance for only U4+ component of a beam. The obtained results and final beam dynamics design for the new straight beam line are presented.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-THPME007
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)
THPME008	New Reference Design of the European ADS RFQ Accelerator for MYRRHA	3223
	C. Zhang GSI, Darmstadt, Germany H. Podlech IAP, Frankfurt am Main, Germany
	For demonstrating the technical feasibility of nuclear waste transmutation in an Accelerator Driven System (ADS), the MYRRHA (Multi-purpose hYbrid Research Reactor for High-tech Applications) proton driver is under intensive studies. Good performance of the 2 – 4 mA, 1.5MeV RFQ (Radio-Frequency Quadrupole), the start of the accelerator chain, is essential to the reliability of the whole facility, so it must be very well designed. On the basis of the first reference design, further improvements with respect to electrode aperture, emittance growths and output distributions have been performed. The simulation results of the new reference design are presented in this paper.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-THPME008
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)
THPME009	Beam Dynamics for the FAIR Proton-Linac RFQ	3226
	C. Zhang GSI, Darmstadt, Germany
	The FAIR (Facility for Antiproton and Ion Research) Proton-Linac (P-LINAC) will be started with a 325.224 MHz, 3 MeV Radio-Frequency Quadrupole (RFQ) accelerator. To ensure that a ≥35 mA beam can be injected into the downstream synchrotrons, the design beam intensity of this Proton-RFQ (P-RFQ) has been chosen as 70 mA. Based on the so-called NFSP (New Four-Section Procedure) method, two new beam dynamics designs with varying and constant transverse focusing strength, respectively, have been worked out to meet the latest design requirements using a compact structure. This paper presents the main design concepts and simulation results.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-THPME009
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)
THPME010	A 325 MHz High Gradient CH – Test Cavity for β=0.16	3229
	A. Almomani, U. Ratzinger IAP, Frankfurt am Main, Germany
	Funding: BMBF, contract no. 05P12RFRB9 This pulsed linac activity aims on compact designs, which means a considerable increase in voltage gain per meter. At IAP – Frankfurt, a CH – cavity was developed for these studies, where mean effective accelerating fields well above 10 MV/m are expected at 325 MHz, β=0.164. This cavity is developed within a funded project. Currently, the cavity is under construction and expected to be ready for copper plating in autumn 2014. The results might influence the rebuilt of the UNILAC – Alvarez section, which aims on achieving the beam intensities specified for the GSI – FAIR project. The new GSI 3 MW Thales klystron test stand will be very important for these investigations. Detailed investigations for two different types of copper plating can be performed on this cavity. In this work, the status of the cavity fabrication will be presented. Moreover, low temperature operation of copper cavities is discussed for the case of very short RF pulses.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-THPME010
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)
THPME011	First Coupled CH Power Cavity for the FAIR Proton Injector	3232
	R. M. Brodhage, G. Clemente, W. Vinzenz GSI, Darmstadt, Germany R. M. Brodhage, U. Ratzinger IAP, Frankfurt am Main, Germany
	For the research program with cooled antiprotons at FAIR a dedicated 70 MeV, 70 mA proton injector is required. The main acceleration of this room temperature linac will be provided by six CH cavities operated at 325 MHz. Each cavity will be powered by a 2.5 MW Klystron. For the second acceleration unit from 11.5 MeV to 24.2 MeV a 1:2 scaled model has been built. Low level RF measurements have been performed to determine the main parameters and to prove the concept of coupled CH cavities. In 2012, the assembly and tuning of the first power prototype was finished. Until then, the cavity was tested with a preliminary aluminum drift tube structure, which was used for precise frequency and field tuning. In 2013 the final drift tube structure has been welded inside the main tanks and the preparation for copper plating has taken place. This paper will report on the main tuning and commissioning steps towards that novel type of DTL and it will show the latest results measured on a fully operational CH proton cavity shortly before copper plating.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-THPME011
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)
THPME012	Results of the High Power Test of the 325 MHz 4-Rod RFQ Prototype	3235
	B. Koubek, H. Podlech, A. Schempp, J.S. Schmidt IAP, Frankfurt am Main, Germany
	For the FAIR proton linac at GSI a 325 MHz 4-rod RFQ prototype has been built. On this prototype RF measure- ments have been carried out. After low power conditioning in cw mode the structure was high power tested in pulsed mode. During the performance tests the 6 stem prototype was optimized and has shown the feasibility of a dipole free 4-rod RFQ at high frequencies and was testet up to 120 kW per meter. In this tests the input power and the electrode voltage was observed using gamma spectroskopy. From this the shunt impedance was calculated and compared to other methods of measurements. The power test results are presented in this paper.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-THPME012
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)
THPME013	Field Optimized 4-rod RFQ Model	3238
	J.S. Schmidt, B. Koubek, A. Schempp IAP, Frankfurt am Main, Germany
	The performance of an RFQ in case of its beam quality and transmission is in the basis dependent on the conformity of the field distribution of the manufactured structure with the one of its particle dynamic design. In the last years studies have been performed on the influence of various elements of the 4-rod RFQ on its field distribution. In particular the tuning process of the 4-rod RFQ with its tuning plates has been optimized. These studies have been complemented with detailed simulations on the fringe fields at the end of the electrodes and the conformity of the fields along the structure as well as the influence of other tuning elements like the piston tuner. Based on the findings of this research a proposal for a field optimized 4-rod RFQ model has been developed and will be presented in this paper.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-THPME013
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)
THPME014	Beam Dynamics in the LEBT for FRANZ	3241
	P.P. Schneider, H. Dinter, M. Droba, O. Meusel, D. Noll, T. Nowottnick, O. Payir, H. Podlech, A. Schempp, C. Wiesner IAP, Frankfurt am Main, Germany
	The two Low Energy Beam Transport (LEBT) sections of the accelerator-driven neutron source FRANZ* consist of four solenoids. The first section with two solenoids will match the 120 keV proton beam into a chopper system**. Downstream from the chopper system a second section with two more solenoids will match the beam into the acceptance of the following RFQ. The accelerator will be operated using either a 2 mA dc beam or a pulsed beam with intensities from 50 mA to 200 mA at 250 kHz repetition rate. The high intensity of these ion beams requires the consideration of space-charge effects. Particle simulations with varying parameter sets have been performed in order to determine the settings providing best transmission and beam quality. Loss profiles along the transport channel were computed to identify hotspots. Simulation results for best transmission at lowest emittance growth will be presented. * O. Meusel et al., Proc. of LINAC12, Tel-Aviv, Israel, MO3A03 ** C. Wiesner et al., Proc. of IPAC2012, New Orleans, LA., USA, THPPP074
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-THPME014
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)
THPME015	Experimental Performance of an E×B Chopper System	3244
SUSPSNE042	use link to see paper's listing under its alternate paper code
	C. Wiesner, H. Dinter, M. Droba, O. Meusel, D. Noll, T. Nowottnick, O. Payir, U. Ratzinger, P.P. Schneider IAP, Frankfurt am Main, Germany
	Beam operation of an E×B chopper system has started in the Low-Energy Beam Transport (LEBT) section of the accelerator-driven neutron source FRANZ*. The chopper is designed for low-energy high-perveance beams and high repetition rates. It combines a static magnetic deflection field with a pulsed electric compensation field in a Wien filter-type E×B configuration**. Helium ions with 14 keV energy were successfully chopped at the required repetition rate of 257 kHz. The maximum chopped beam intensity of 3.5 mA, limited by the given test ion source, corresponds to a generalized perveance of 2.7·10-3. For the design species and energy, 120 keV protons, this is equivalent to a beam current of 174 mA. Beam pulses with rise times of 120 ns, flat top lengths of 85 ns to 120 ns and Full Width at Half Maximum (FWHM) between 295 ns and 370 ns were experimentally achieved. * U. Ratzinger et al., Proc. of IPAC2011, San Sebastián, Spain, WEPS040. ** C. Wiesner et al. Proc. of IPAC2012, New Orleans, LA., USA, THPPP074.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-THPME015
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)
THPME016	Experimental Results on SCDTL Structures for Protons	3247
	L. Picardi, A. Ampollini, G. Bazzano, P. Nenzi, C. Ronsivallepresenter, V. Surrenti, M. Vadrucci ENEA C.R. Frascati, Frascati (Roma), Italy F. Ambrosini URLS, Rome, Italy
	The medium-energy section of the proton linear accelerator for radiotherapy under realization in the framework of the TOP-IMPLART Project consists in a high frequency 7-35 MeV SCDTL (Side Coupled Drift Tube Linac) structure. The structure, made of 4 modules supplied by one klystron, has been completely designed. The first module up to 11.6 MeV has been built and is under commissioning at ENEA-Frascati and the second and third modules are under realization. The paper describes the system and presents the main results of the experimental activity on this part of the accelerator.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-THPME016
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)
THPME017	Electromechanical Analysis of SCDTL Structures	3250
	M. Ciambrella, F. Cardellipresenter, M. Migliorati, A. Mostacci, L. Palumbo URLS, Rome, Italy L. Ficcadenti, V. Pettinacci INFN-Roma, Roma, Italy L. Picardi, C. Ronsivalle ENEA C.R. Frascati, Frascati (Roma), Italy
	The Side Coupled Drift Tube Linac (SCDTL) is a 3 GHz accelerating structure for proton therapy linac designed for TOP-IMPLART, an Intensity Modulated Proton Linear Accelerator for Radio-Therapy. The structure is made up of short DTL accelerating tanks for low current proton beams, coupled by side coupling cavities. The purpose of this paper is to report on the analysis of electromagnetic and the thermo-mechanical behavior for the SCDTL structure. The 3D electromagnetic analysis is used to derive the power dissipation on the structure; then one can infer the temperature distribution and deformation field in order to eventually evaluate their feedback on the electromagnetic properties of the structure as, for instance, the cavity resonant frequency shift. Such a "multi-physics'' analysis has been performed for different supporting stem geometries in order to optimize the shunt impedance and the R/Q for SCDTL cavities.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-THPME017
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)
THPME018	Global Search Methods for Electromagnetic Optimization of Compact Linac Tanks	3253
	O. Losito, V. Dimiccoli, G. Rutigliani ITEL, Ruvo di Puglia, Italy L. De Palma, F. Prudenzano Politecnico di Bari (DEI), Bari, Italy
	We shows the optimization of a five cell tank to be included as first multi-cavity within a LINAC section accelerating a proton beam from 7 MeV to higher energies, useful for proton therapy. The tank performance depends on a set of physical (beam characteristics) and geometrical parameters (radius and lengths of accelerating and coupling cavities, radius and thickness of the coupling holes among accelerating cells, the radius and the thickness of the coupling holes between off-axis coupling cells and accelerating ones). PSO (Particle Swarm Optimization) and ACO (Ant Colony Optimization) have been used as approaches for the electromagnetic optimization. The model used for the fitness calculation takes into account all the most important effects occurring in the tank coupled cavities loaded by the proton beam. The codes based on PSO and ACO have enabled the global and stochastic identification of about ten optimized parameters. The design goodness has been tested via Particle and Microwave CST Studio © simulation. The optimized tank accelerates the proton beam input energy from Ein=7 MeV to about Eout= 8.2 MeV. These values, well agree with other designs reported in literature.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-THPME018
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)
THPME019	LIPAc, the 125mA / 9MeV / CW Deuteron IFMIF’s Prototype Accelerator: What Lessons Have We Learnt from LEDA?	3256
	F. Scantamburlo, J. Knaster, Y. Okumura IFMIF/EVEDA, Rokkasho, Japan N. Chauvin, R. Gobin, P.A.P. Nghiem CEA/DSM/IRFU, France A. Kasughai, H. Shidara Japan Atomic Energy Agency (JAEA), International Fusion Energy Research Center (IFERC), Rokkasho, Kamikita, Aomori, Japan
	The Engineering Validation and Engineering Design Activities (EVEDA) phase of IFMIF aims at running a 9 MeV / 125 mA / CW deuteron accelerator to demonstrate the feasibility of IFMIF’s 40 MeV / 125 mA / CW accelerator with components mainly designed and constructed in European labs. LEDA was operated successfully in 1999-2001 as a 6.7 MeV / 100 mA / CW proton accelerator with high availability. The present paper assesses the experience gained in LEDA and explains how LIPAc, the IFMIF prototype accelerator, is inheriting its role of breaking through technological boundaries.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-THPME019
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)
THPME020	Local Compensation-rematch for the C-ADS Accelerator Element Failures with Space Charge	3259
SUSPSNE040	use link to see paper's listing under its alternate paper code
	B. Sun, C. Meng, J.Y. Tang, F. Yan IHEP, Beijing, People's Republic of China
	In order to achieve the required reliability and availability for the C-ADS accelerator, a fault tolerance design is pursued. The effects of cavity and solenoid failure in different locations have been studied and the schemes of compensation by means of local compensation have been investigated. After one cavity failure, by adjusting the settings of the neighbouring cavities and the focusing elements we can make sure that the Twiss parameters and energy are approximately recovered to that of the nominal ones at the matching point. However, the compensation work above is based on the TraceWin code, which has not considered the phase compensation, a code based on MATLAB is under developing to compensate the arrival time at the matching point that the linear space charge effect has also considered.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-THPME020
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)
THPME021	Designs of High-intensity Proton Linacs with Non-equipartitioning	3262
	C. Meng, Z. Li, S. Pei, B. Sunpresenter, J.Y. Tang, F. Yan IHEP, Beijing, People's Republic of China R. Garoby, F. Gerigk, A.M. Lombardi CERN, Geneva, Switzerland
	Superconducting technology is playing more and more important roles in high-power proton linacs. Periodic phase advance less than 90 degrees and equipartitioning design are considered very important principles in linac design. Due to the very high construction and operation costs, it is very important in optimizing the design to lower the costs. In usual, the longitudinal emittance is larger from the front-end, thus the transverse phase advance is designed to have a larger value. However, with the technical advancement, higher accelerating field can be obtained. In order to take this advantage, it is of much interest in increasing the longitudinal phase advance to shorten the linac or reduce the cost. In this paper, we present the design method that keeping the longitudinal phase advance as large as possible but smaller than 90 degree to maximize the use of the available accelerating gradient. Even though this method does not observe the equipartitioning condition, we can also obtain very good beam dynamics results by placing the tunes in resonant-free regions. In this paper, the design and simulation results by applying this method to the SPL and China-ADS linac will be present.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-THPME021
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)
THPME022	Recent Progress of the SSC-LINAC RFQ	3265
	G. Liu, J.E. Chen, S.L. Gao, Y.R. Lupresenter, Z. Wang, X.Q. Yan, K. Zhu PKU, Beijing, People's Republic of China H. Du, Y. He, P. Jiang, X.N. Li, Z.S. Li, J.X. Wu, J.W. Xia, Y.Q. Yang, X. Yin, Y.J. Yuan, X.H. Zhang, H.W. Zhao IMP, Lanzhou, People's Republic of China
	Funding: NFSC(11079001) The project of SSC-LINAC RFQ has important progresses in the past year. The machine has been moved to the Institute of Modern Physics in the first season of 2013. The cavity measurement including tests of RF performance and field distribution is carried out again in the laboratory. The Q0 is 6440, and the unflatness of the electric field in longitudinal is ±2.5%. The results demonstrated a good agreement with simulation. The RF and beam commissioning of the RFQ has been carried out in the first half of 2014. The duty factor rose from 5% to CW gradually. By now, the cavity has been operated with 35 kW on CW mode. The measurement of the bremsstrahlung spectrum reveals that the 35 kW power is needed to generate the 70 kV inter-vane voltage. The beam transmission efficiency and energy spread has been obtained in beam commissioning by accelerating 16O5+ and 40Ar8+ beams. The efficiency of 40Ar8+ is as high as 94%, and the output energy is 142.78 keV/u. All the processes and results of the experiments will be discussed in details.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-THPME022
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)
THPME023	CPHS Linac Status at Tsinghua University	3268
	Q.Z. Xing, C. Cheng, L. Du, T. Du, X. Guan, C. Jiang, X.W. Wang, H.Y. Zhang, S.X. Zheng TUB, Beijing, People's Republic of China W.Q. Guan, Y. He, J. Li NUCTECH, Beijing, People's Republic of China
	Funding: Work supported by National Natural Science Foundation of China (Major Research Plan Grant No. 91126003 and 11175096). We present, in this paper, the operation status of the 3 MeV high current proton Linac for the Compact Pulsed Hadron Source (CPHS) at Tsinghua University. Proton beam with the peak current of 30 mA, pulse length of 100 μs and repetition rate of 50 Hz has been delivered to the Beryllium target to produce the neutron since July 2013. The pulse length will be further increased to 500 μs. The proton beam energy is expected to be enhanced to the designed value of 13 MeV after the Drift Tube Linac is ready in 2015.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-THPME023
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)
THPME024	Cooling Design for the FRIB RFQ Cavity at Michigan State University	3271
	J. Zeng, L. Du, X. Guan, Q.Z. Xingpresenter, S.X. Zheng TUB, Beijing, People's Republic of China W.Q. Guan, J. Li NUCTECH, Beijing, People's Republic of China
	Funding: Work supported by the Major Research plan of the National Natural Science Foundation of China (Grant No. 91126003) We present, in this paper, the cooling design for the Radio Frequency Quadrupole (RFQ) cavity of the Facility for Rare Isotope Beams (FRIB) at Michigan State University. The locations and radius of the cooling passages are optimized, which exist in the five-meter-long copper cavity, tuners, dipole-mode stabilizing rods and end-plates. A three-dimensional RF, thermal, and structural analysis by ANSYS has been performed to carry out the design and verify that the present design can meet the requirement for water velocity, stress, deformation and frequency shift.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-THPME024
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)
THPME025	Low Power Test of a Hybrid Single Cavity Linac	3274
	L. Lu, Y. He, Q. Jin, C.X. Li, G. Pan, A. Shi, L.B. Shi, L.T. Sun, L.P. Sun, Z.L. Zhang, H.W. Zhao, H. Zhao IMP, Lanzhou, People's Republic of China T. Hattori NIRS, Chiba-shi, Japan N. Hayashizaki RLNR, Tokyo, Japan
	We fabricated and assembled a hybrid single cavity (HSC) linac which is formed by combining a radio frequency quadrupole (RFQ) structure and a drift tube (DT) structure into one interdigital-H (IH) cavity. ]. The HSC linac was designed as an injector for a cancer facility and was able to be used as a neutron source for boron neutron capture therapy. The injection method of the HSC linac used a direct plasma injection scheme (DPIS), which is considered to be the only method for accelerating a high current heavy ion beam produced by a laser ion source. The input beam current was designed to be 20 mA, which could be produced by a laser ion source. According to the simulations and calculations, the HSC linac could accelerate a 6-mA C6+, beam which satisfies the particle number criteria for cancer therapy use (108~9 ions/pulse). Details of the measurements and evaluations of the assembled HSC linac, and details of a DPIS test using a laser ion source are reported in this paper.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-THPME025
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)
THPME026	The R&D Status of SSC-LINAC	3277
	X. Yin, H. Du, Y. He, P. Jiang, X.N. Li, L.Z. Ma, J. Meng, L.T. Sun, H. Wang, J.W. Xia, Z. Xu, Y.Q. Yang, Q.G. Yao, Y.J. Yuanpresenter, X.H. Zhang, X.Z. Zhang, H.W. Zhao, Z.Z. Zhou IMP, Lanzhou, People's Republic of China J.E. Chen, S.L. Gao, G. Liu, Y.R. Lu, X.Q. Yan, K. Zhu PKU, Beijing, People's Republic of China
	A powerful heavy ion injector SSC-linac is under constructing at IMP in Lanzhou. The continuous wave (CW) 4-rod RFQ operating at 53.667 MHz has been developed as the low beam energy injector linac. The 40Ar8+ ion beam extracted from the ECR ion source was used for the RFQ commissioning. The particle energy 142.8 keV/u and the 198 euA beam current were measured at the exit of RFQ with the 94% transmission. In this paper, the recent R&D progress of the SSC-LINAC including the development of key components and the beam commissioning results are presented.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-THPME026
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)
THPME027	Development of the injector II RFQ for China ADS project	3280
	Z.L. Zhang, Y.H. Guo, Y. He, H. Jia, C.X. Li, Y. Liu, L. Lu, G. Pan, A. Shi, L.B. Shi, L.P. Sun, W.B. Wang, X.W. Wang, J.X. Wu, Q. Wu, X.B. Xu, B. Zhang, J.H. Zhang, H.W. Zhao, T.M. Zhu IMP, Lanzhou, People's Republic of China M.D. Hoff, A.R. Lambert, D. Li, J.W. Staples, S.P. Virostek LBNL, Berkeley, California, USA C. Zhang GSI, Darmstadt, Germany
	As one of the main components of the injector II of China ADS LINAC project, an RFQ working at 162.5MHz is used to accelerate proton beams of 15mA from 30 keV to 2.1 MeV. The four vane RFQ has been designed in collaboration with Lawrence Berkeley National Laboratory and built at the workshop of the Institute of Modern Physics, Chinese Academy of Sciences (IMP, CAS). Low power test of the cavity have been completed, and it shows the field flatness is within ±1% and the unloaded Q is 12600. RF conditioning has been completed, results of preliminary beam test show the output beam energy is 2.16 MeV with energy spread of 3.5% and the transmission efficiency is 97.9%. Continuous wave (CW) beam of 2.3 mA has been accelerated for more than one hour.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-THPME027
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)
THPME029	Upgrade of Heavy Ion Injector for ITEP-TWAC Facility	3283
	V. Andreev, N.N. Alexeev, A.I. Balabin, M.M. Kats ITEP, Moscow, Russia A.A. Metreveli MEPhI, Moscow, Russia
	A new scheme of heavy ion injector I-3 designed for improvement of accelerated beam parameters has been proposed for ITEP-TWAC Facility. It is based on the usage of two quarter-wave double gap resonators operated on 5 MHz with accelerating voltage of 3 MV per gap. Existing 2.5 MHz double gap resonator will be retuned for operational frequency of 5 MHz and new additional one will be built. The new injector optimized for acceleration of heavy ions with A/Z in the range of 3-10 will allow accelerating any ions from C to U with beam current up to10 mA. Results of both electrodynamics and beam dynamics simulations of the accelerating structures are presented.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-THPME029
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)
THPME030	Beam Dynamics and Accelerating Cavity Electrodynamics' Simulation of CW 2 MeV Proton RFQ	3286
	S.M. Polozov, A.E. Aksentyev, T. Kulevoy MEPhI, Moscow, Russia
	The CW proton linac has a number of important applications; serving as the initial part of a high-energy, high-power linac for an accelerator-driven system is the main of them. Its CW operation mode and a 5-10 mA beam current, however, are limiting factors for the accelerating field. The surface field should not exceed the Kilpatrick field by more than 1.2-1.5 times. This limitation leads to the increase in linac length and beam bunching complexity. The first results of a 2 MeV, 5 mA, CW RFQ, designed for the operating frequency of 162 MHz, are discussed. Beam dynamics simulation results, obtained by using the BEAMDULAC-RFQ code*, are presented. The electrodynamics of the accelerating structure based on the four-vane cavity is discussed. The accelerating cavity design uses coupling windows as was proposed earlier **, but with windows of an elliptical form. Such form allows for better separation of quarupole and dipole modes. * S.M. Polozov. Problems of Atomic Science and Technology. Series: Nuclear Physics Investigations, 3 (79), 2012, p. 131-136. ** V.A. Andreev. Patent US5483130, 1996.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-THPME030
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)
THPME031	Beam Dynamics Simulation in SC Linac for the Proton Radiotherapy	3289
	S.M. Polozov, I.A. Ashanin, A.V. Samoshin MEPhI, Moscow, Russia
	Superconducting linear accelerators based on short independently phased SC cavities are widely used today in ADS and FRIB. Such accelerator can be useful as proton therapy beam source*. The accelerator general layout to accelerate proton beam at the energy range 2-240 MeV will detail in this report. Obviously, in this linac will always violate the principle of synchronicity when the synchronous particle velocity is equal to the phase velocity of the accelerating wave and a slipping of particles relative to the accelerating wave. The beam dynamics simulation shows that linac should consist of four groups of identical cavities. Cavities should have phase velocities as βg=0.1, 0.18, 0.3 and 0.49 respectively. The choice of optimum parameters of accelerating cavities and focusing magnets will discussed and the beam dynamics simulation results will presented. *S.M. Polozov, A.V. Samoshin. Proc. of LINAC’12, pp. 633-635
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-THPME031
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)
THPME032	Beam Transfer Studies for LINCE Experimental Areas	3292
	L. Acosta, C. Bonțoiu, I. Martel, A.R. Pinto Gómez, A.C.C. Villari University of Huelva, Huelva, Spain J. Lucas Elytt Energy, Madrid, Spain A.C.C. Villari FRIB, East Lansing, Michigan, USA
	Funding: Work partially supported by the Spanish Government (MINECO-CDTI) under program FEDER INTERCONNECTA. Beam transport from the exit of the LINCE linac to experimental areas has been optimized for a few ion species using transfer matrix calculations performed in MADX. An alpha spectrometer based on a double-bending achromat lattice has been used as dispersion suppressor and particle tracking studies have been carried out in GPT along it and the three beamlines. Realistic quadrupole and dipole magnet design achieved in Comsol enabled accurate particle tracking studies and evaluation of the beam parameters delivered at the target.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-THPME032
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)
THPME033	Particle Tracking Studies for the LINCE SC Linac	3295
	C. Bonțoiu, I. Martel University of Huelva, Huelva, Spain A. Falone TTI, Santander, Spain C. Gómez IDOM, Bilbao, Spain
	Funding: Work partially supported by the Spanish Government (MINECO-CDTI) under program FEDER INTERCONNECTA. LINCE facility makes use of a low-energy ion linac consisting of quarter-wave resonators designed for β = 0.045, 0.077 and 0.15 (72.75 and 109.125 MHz), and shielded solenoid magnets distributed along four different cryomodules. Particle tracking studies have been performed along the linac using realistic electric and magnetic field maps with and without space charge effects to prove a final energy of 8.5 and 45 MeV/u respectively for uranium ions and protons.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-THPME033
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)
THPME035	High-performance Accelerating Cryomodule for the LINCE Project	3298
	D. Gordo-Yáñez, R. Carrasco Dominguez, I. Martel, A.R. Pinto Gómez University of Huelva, Huelva, Spain C. Gómez IDOM, Bilbao, Spain
	Funding: Work partially supported by the Spanish Government (MINECO-CDTI) under program FEDER INTERCONNECTA. The linear accelerator of LINCE consists on 26 superconducting quarter-wave resonators with three different geometric betas working at 72.75 and 109.125 MHz and three types of SC solenoids. In this paper we discuss the first cryomodule design based on thermal and mechanical studies carried out in COMSOL Multiphysics. This includes the design of cavity and solenoid cryostats, liquid-helium reservoir and layout of the cryogenic tank.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-THPME035
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)
THPME036	ECOS-LINCE: A High Intensity Multi-ion Superconducting Linac for Nuclear Structure and Reactions	3301
	I. Martel, L. Acosta, R. Carrasco Dominguez, J.A. Dueñas, A.K. Orduz, A. Peregrin, J. Prieto-Thomas, J. Sanchez-Segovia, A.C.C. Villari University of Huelva, Huelva, Spain F. Azaiez IPN, Orsay, France G. De Angelis INFN/LNL, Legnaro (PD), Italy M. Lewitowicz GANIL, Caen, France A. Maj IFJ-PAN, Kraków, Poland P.N. Ostroumov ANL, Argonne, Illinois, USA A.C.C. Villari FRIB, East Lansing, Michigan, USA
	Funding: Work partially supported by the Spanish Government (MINECO-CDTI) under program FEDER INTERCONNECTA. During the past ten years, ECOS working group and users strongly supported the construction of a dedicated high-intensity stable-ion-beam facility in Europe, with energies at and above the Coulomb barrier as part of the Long-Range Plan of the Nuclear-Physics community. LINCE will be a multi-user facility dedicated to ECOS science: fundamental physics, astrophysics, nuclear structure and reaction dynamics. Applied research is foreseen in the fields of medical physics, aerospace and material sciences with energetic heavy ions. The facility will produce a wide range of ions, from protons (45 MeV) up to Uranium (8.5 MeV/u) with 1mA maximum beam intensity. A very compact linac has been designed by using a HV platform with a double-frequency ECR ion source, multi-harmonic buncher, an innovative CW RFQ design (1 ≤A/Q ≤ 7) and 26 accelerating cavities made of bulk niobium (β = 0.045, 0.077 and 0.15) working at 72.75 and 109.125 MHz. This article gives an outline of the accelerator complex from the ion source to the experimental areas, and presents its research potential and the relevant physics instrumentation.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-THPME036
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)
THPME037	Development of a 72.75 MHz RFQ for the LINCE Accelerator Complex	3304
SUSPSNE039	use link to see paper's listing under its alternate paper code
	A.K. Orduz, C. Bonțoiu, I. Martel, A.C.C. Villari University of Huelva, Huelva, Spain A. Garbayo AVS, Elgoibar, Spain P.N. Ostroumov ANL, Argonne, Illinois, USA A.C.C. Villari FRIB, East Lansing, Michigan, USA
	Funding: Work partially supported by the Spanish Government (MINECO-CDTI) under program FEDER INTERCONNECTA. Low-energy acceleration for the LINCE project [1] will be achieved using a 72.75 MHz normal conducting four vanes RFQ designed to give a 460 keV/u boost for A/Q = 7 ions in about 5 m. The vanes are modeled to accommodate windows for a clear separation of the RFQ modes and easy fitting to an octagonal resonance chamber. This article presents the main numerical results of the radio-frequency modeling and computational fluid dynamics (CFD). Particle tracking studies optimized for bunching and acceleration are shown as well. [1] I. Martel et al., “LINCE: A High Intensity Multi-ion Superconducting Linac for Nuclear Structure and Reactions”, IPAC’14, Dresden, Germany, June 2014, THPME036, These Proceedings.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-THPME037
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)
THPME038	Low Power RF Characterization of ESS Bilbao RFQ Cold Model	3308
	N. Garmendia, I. Bustinduy, O. González, P.J. González, I. Madariaga, L. Muguirapresenter, J.L. Muñoz ESS Bilbao, Zamudio, Spain A.V. Vélez HZB, Berlin, Germany
	In order to test both the design and manufacturing procedures of the final ESS-Bilbao RFQ, a 1 meter long RFQ Cold Model, including a longitudinal vane modulation, has been manufactured in aluminium. Low power RF measurements have been performed to obtain the main figures of merit of the cavity, including: frequency spectrum, coupling and quality factors, tuning range, RF sealing effect and the accelerating field profile. The experimental and simulated results are explained and analyzed.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-THPME038
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)
THPME039	Requirements for ESS Superconducting Radio Frequency Linac	3311
	C. Darve, M. Eshraqi, D.P. McGinnis, S. Molloy, E. Tanke ESS, Lund, Sweden
	The European Spallation Source (ESS) is a pan-European project. It will be built by at least 17 European countries, with Sweden and Denmark as host nations. The Superconducting Radio-Frequency (SRF) linac is composed of one section of spoke cavity cryomodules (352.21 MHz) and two sections of elliptical cavity cryomodules (704.42 MHz). These cryomodules contain niobium SRF cavities operating at 2 K. Following a redesign of its accelerator, SRF linac design shall comply with a new set of requirement, like an increase of the beam current from 50 mA to 62.5 mA and an increase of the peak electrical surface field from 40 MV/m to 45 MV/m. Requirements and the main disciplines needed to construct this portion of the linac are presented.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-THPME039
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)
THPME041	ESS DTL Status: Redesign and Optimizations	3314
	R. De Prisco, M. Eshraqi ESS, Lund, Sweden M. Comunian, F. Grespan, A. Pisent INFN/LNL, Legnaro (PD), Italy A.R. Karlsson Lund University, Lund, Sweden
	The European Spallation Source (ESS) uses a linear accelerator to deliver the high intensity proton beam to the target station. The average beam power is 5 MW with a peak beam power at target of 125 MW. In 2013 the ESS linac was costed and to meet the budget some modifications were introduced: the final energy was decreased from 2.5 GeV to 2.0 GeV and the beam current was increased from 50 mA to 62.5 mA to keep the same beam power. As a consequence the ESS Drift Tube Linac, DTL, has been re-designed to match the new requirements. This paper presents the main Radio Frequency (RF) and beam dynamics choices for the ESS DTL.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-THPME041
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)
THPME042	Preliminary Functional Analysis and Operating Modes of ESS 704 MHz Superconducting Radio-Frequency Linac	3317
	N. Elias, C. Darve, J. Fydrych, A. Nordt, D.P. Piso ESS, Lund, Sweden
	The European Spallation Source (ESS) is one of Europe’s largest planned research infrastructures. The project is funded by a collaboration of 17 European countries and is under design and construction in Lund, Sweden. Three families of Superconducting Radio-Frequency (SRF) cavities are being prototyped, counting the spoke resonators with a geometric beta of 0.5, medium-beta elliptical cavities (β=0.67) and high beta elliptical cavities (β=0.86). The ESS linac will produce 2.86 ms long proton pulses with a repetition rate of 14 Hz (4 % duty cycle), a beam current of 62.5 mA and an average beam power of 5 MW. A control system is being developed to operate the different accelerator systems. All operating modes of the superconducting linac shall ensure a safe operation of the accelerator. This paper presents the preliminary functional analysis and the operating modes of the 704 MHz SRF linac.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-THPME042
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)
THPME043	The ESS Linac	3320
	M. Eshraqi, H. Danared, R. De Prisco, M. Lindroos, D.P. McGinnis, R. Miyamoto, M. Muñoz, A. Ponton, E. Sargsyan ESS, Lund, Sweden I. Bustinduy ESS Bilbao, Bilbao, Spain L. Celona INFN/LNS, Catania, Italy M. Comunian, F. Grespan INFN/LNL, Legnaro (PD), Italy S.P. Møller, H.D. Thomsen ISA, Aarhus, Denmark
	The European Spallation Source, ESS, uses a linear accelerator to bombard the tungsten target with the high intensity protons beam for producing intense beams of neutrons. The nominal average beam power of the linac is 5~MW with a peak beam power at target of 125~MW. During last year the ESS linac was costed, and to meet the budget a few modifications were introduced to the linac design. One of the major changes is the reduction of final energy from 2.5~GeV to 2.0~GeV and therefore beam current was increased accordingly to compensate for the lower final energy. As a result the linac is designed to meet the cost objective by taking a higher risk. This paper focuses on the driving forces behind the new design, engineering and beam dynamics requirements of the design and finally on the beam dynamics performance of the linac.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-THPME043
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)
THPME044	Statistical Error Studies in the ESS Linac	3323
	M. Eshraqi, R. De Prisco, R. Miyamoto, E. Sargsyan ESS, Lund, Sweden H.D. Thomsen ISA, Aarhus, Denmark
	Following the completion of the latest layout of the ESS linac statistical error studies have been performed to define the field vector quality and alignment tolerances. Based on these tolerances and error study results a scheme for the correction system is proposed that assures low losses and permits hands-on maintenance. This paper reports on the strategy of simulating and performing the error studies as well as setting the tolerances.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-THPME044
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)
THPME045	Beam Physics Design of the ESS Medium Energy Beam Transport	3326
	R. Miyamoto, B. Cheymol, M. Eshraqipresenter ESS, Lund, Sweden I. Bustinduy ESS Bilbao, Bilbao, Spain
	A radio frequency quadrupole (RFQ) and drift tube linac (DTL) in the ESS proton linac are connected with a medium energy beam transport (MEBT) to remove low intensity bunches on the head and tail of a macro-pulse with a chopper and house diagnostic devices to characterize and adjust the beam out of the RFQ for the DTL. These must be achieved within a relatively short space and without large degradation of beam quality due to space charge force, imposing a challenge on the lattice design. This paper presents a beam physics design of the MEBT in the ESS proton linac, which satisfies its requirement while preserving a decent beam quality.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-THPME045
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)
THPME047	Sorting in the ESS	3329
	S. Peggs, E. Laface, E. Sargsyanpresenter, R. Zeng ESS, Lund, Sweden
	Sorting optical elements has significant potential during the construction of superconducting linacs like the ESS, in the same way that it has proved to be very effective in circular accelerators like RHIC and the LHC. In the linac domain, the elements of primary interest are cavities and cryomodules, instead of the magnets (of all sorts) that are routinely sorted in circular accelerators. Multiple cavities can be sorted to optimise individual cryomodules, and cryomodules can be sorted into optimised locations within the tunnel. Different sorting strategies are discussed and preliminarily evaluated in this paper. Central to the evaluation is the identification of goal (or penalty) functions that are maximised (or minimised), and which can be rapidly quantified by simulation. Also crucial is the availability of a modeling system that is realistic in its complex representation of the linac, and which can easily be modified and developed.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-THPME047
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)
THPME048	Status and Plans for Linac4 Installation and Commissioning	3332
	M. Vretenar, A. Akroh, L. Arnaudon, P. Baudrenghien, G. Bellodi, J.C. Broere, O. Brunner, J.F. Comblin, J. Coupard, V.A. Dimov, J.-F. Fuchs, A. Funken, F. Gerigk, E. Granemann Souza, K. Hanke, J. Hansen, I. Kozsar, J.-B. Lallement, L. Lenardon, J. Lettry, A.M. Lombardi, C. Maglioni, Ø. Midttun, B. Mikulec, D. Nisbet, M.M. Paoluzzi, U. Raich, S. Ramberger, F. Roncarolo, C. Rossi, J.L. Sanchez Alvarez, R. Scrivens, J. Tan, C.A. Valerio, J. Vollaire, R. Wegner, S. Weisz, M. Yarmohammadi Satri, F. Zocca CERN, Geneva, Switzerland
	Linac4 is a normal conducting 160 MeV H− linear accelerator presently being installed and progressively commissioned at CERN. It will replace the ageing 50 MeV Linac2 as injector of the PS Booster (PSB), increasing at the same time its brightness by a factor of two thanks to the higher injection energy. This will be the first step of a program to increase the beam intensity in the LHC injectors for the needs of the High-Luminosity LHC project. After a series of beam measurements on a dedicated test stand the 3 MeV Linac4 front-end, including ion source, RFQ and a beam chopping line, has been recommissioned at its final position in the Linac4 tunnel. Commissioning of the following section, the Drift Tube Linac, is starting. Beam commissioning will take place in steps of increasing energy, to reach the final 160 MeV in 2015. An extended beam measurement phase including testing of stripping equipment for the PSB and a year-long test run to assess and improve Linac4 reliability will take place in 2016, prior to the connection of Linac4 to the PSB that will take place during the next long LHC shut-down.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-THPME048
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)
THPME049	TAC Proton Accelerator Facility: Normal Conducting Part	3335
	E. Algin Eskisehir Osmangazi University, Eskisehir, Turkey B. Akkus, L. Sahin Istanbul University, Istanbul, Turkey H. Cetinkaya Dumlupinar University, Faculty of Science and Arts, Kutahya, Turkey
	The Turkish Accelerator Center Proton Accelerator Facility (TAC PAF) based on a 1 MW, 2 GeV proton linac will include both normal conducting and superconducting accelerator structures. The project is currently in the technical design phase. The normal conducting part of the TAC PAF will consist of an ion source, a low energy beam transport line, a radio frequency quadrupole, a medium energy beam transport line, and two drift tube linac structures in order to accelerate the beam up to 65 MeV. Acceleration from 65 MeV up to 150 MeV and then 2 GeV energy will be provided by a SC-spoke cavity and two SC-elliptical cavities, respectively. In the long term, TAC PAF will be used as a neutron source. The accelerator structures, their design, and possible experimental stations of TAC PAF project will be presented.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-THPME049
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)
THPME050	SPP Beamline Design and Beam Dynamics	3338
	G. Turemen, B. Yasatekin Ankara University, Faculty of Sciences, Ankara, Turkey A. Alacakir SNRTC, Ankara, Turkey M. Celik, Z. Sali Gazi University, Faculty of Arts and Sciences, Teknikokullar, Ankara, Turkey O. Metepresenter UMAN, Manchester, United Kingdom G. Unel UCI, Irvine, California, USA V. Yildiz Bogazici University, Bebek / Istanbul, Turkey
	The Radio Frequency Quadrupole (RFQ) of SNRTC Project Prometheus (SPP) will be a demonstration and educational machine which will accelerate protons from 20 keV to 1.5 MeV. The project is funded by Turkish Atomic Energy Authority (TAEK) and it will be located at Saraykoy Nuclear Research and Training Center (SNRTC) in Ankara. The SPP beamline consists of a multi-cusp H+ ion source, a Low Energy Beam Transport (LEBT) line and a four-vane RFQ operating at 352.2 MHz. The design studies for the multi-cusp ion source (RF or DC) were performed with IBSimu and SIMION software packages. The source has already been produced and currently undergoes extensive testing. There is also a preliminary design for the solenoid based LEBT, POISSON and PATH were used in parallel for the preliminary design. Two solenoid magnets are produced following this design. The RFQ design was made using LIDOS. RFQ.Designer and it was crosschecked with a home-grown software package, DEMIRCI. The initial beam dynamics studies have been performed with both LIDOS and TOUTATIS. This paper discusses the design of the SPP beamline focusing on the RFQ beam dynamics.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-THPME050
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)
THPME051	Preparatory Investigations for a Low Frequency Prebuncher at ReA	3342
	D.M. Alt, J.F. Brandon, D. Leitner, D. Morris, M.J. Syphers, N.R. Usher, W. Wittmer NSCL, East Lansing, Michigan, USA
	The ReA reaccelerator facility at the National Superconducting Cyclotron Laboratory (NSCL) at Michigan State University (MSU) will provide a unique capability to study reactions with low-energy beams of rare isotopes. A beam from the coupled cyclotron facility is stopped in a gas stopping system, charge bred in an Electron Beam Ion Trap (EBIT), and then reaccelerated in a compact superconducting LINAC. At present the beam repetition rate at the ReA targets is the same as the LINAC RF frequency of 80.5 MHz. A lower frequency would be desirable for many types of experiments using time of flight data acquisitions. Studies were undertaken to investigate possible methods of reducing the beam frequency with minimal reduction in overall beam current. This paper reports the results of preliminary design studies of such a low frequency prebuncher designed to increase the pulse separation and minimize bunch lengths at the detector.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-THPME051
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)
THPME052	Measurement of the Longitudinal Acceptance of the ReA RFQ	3346
	D.M. Alt, S.W. Krause, A. Lapierre, D. Leitner, S. Nash, R. Rencsok, J.A. Rodriguez, M.J. Syphers, W. Wittmer NSCL, East Lansing, Michigan, USA
	The ReA reaccelerator facility at the National Superconducting Cyclotron Laboratory (NSCL) at Michigan State University (MSU) will provide a unique capability to study reactions with low-energy beams of rare isotopes. A beam from the coupled cyclotron facility is stopped in a gas stopping system, charge bred in an Electron Beam Ion Trap (EBIT), and then reaccelerated in a compact superconducting LINAC. The beam is injected into the LINAC by a room-temperature Radio Frequency Quadrupole (RFQ) combined with an external Multiharmonic Buncher. (MHB) In preparation for future upgrades to the capabilities of the ReA, an accurate determination of the longitudinal acceptance of the RFQ was conducted using a stable ion beam from a test source. This paper presents the results of the acceptance measurement, including empirical confirmation of a predicted asymmetry in the shape of the acceptance window.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-THPME052
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)
THPME053	Cost Rationales for an SRF Proton Linac	3349
	F. Marhauser Muons, Inc, Illinois, USA
	Rationales to assess and minimize costs for a Superconducting Radio Frequency (SRF) proton linac are outlined. Operating frequency, velocity profile and temperature are regarded as variables when applicable. Hardware plus labor costs for cavities and cryomodules as well as expenditures for facility infrastructures including cryogenic systems, conventional facilities, and relevant subsystems are estimated. The focus is on the assessment of a 10 MW, 1 GeV Continuous Wave (CW) linac for an Accelerator Driven Subcritical Reactor (ADSR)
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-THPME053
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)
THPME054	RF Cavity Design Aspects for a Helical Muon Beam Cooling Channel	3352
	F. Marhauser, G. Flanagan, R.P. Johnson, S.A. Kahn Muons, Inc, Illinois, USA K. Yonehara Fermilab, Batavia, Illinois, USA
	Funding: Work supported under U.S. DOE Grant Application Number DE-SC0006266 A Helical Cooling Channel (HCC) promises efficient six-dimensional ionization cooling of muon beams by utilizing high-pressurized gas as a continuous absorber within a magnetic channel embedding RF cavities. The progress on cavity design, tailored for such a cooling channel, is discussed.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-THPME054
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)
THPME055	RF Tuning of the IPHI RFQ	3355
	O. Piquet, M. Desmons, A. Francepresenter CEA/DSM/IRFU, France
	The construction of IPHI (High Power Proton Accelerator) is in its final step of installation. The RFQ will accelerate beam up to 100 mA with energy up to 3 MeV. The RFQ, made of six modules, one meter each, is of the four-vane type. The RFQ is divided in 2-meter long segments with capacitive coupling. It is also equipped with 96 fixed tuners and four waveguide RF ports located in the fourth module. This paper describes the procedure used to tune the accelerating field and power couplers of the RFQ.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-THPME055
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)
THPME056	A Space-charge Compatible "Tomography" of Beam Phase-space Distributions	3358
	N. Pichoff CEA/DSM/IRFU, France A. Lasheen CERN, Geneva, Switzerland
	The well-known 3-gradient method allows accessing to a beam RMS emittance and Twiss parameters at a position A by measuring its rms size at a downstream position B with at least 3 different transport conditions from A to B. We suggest extending this method to access to a beam phase-space distribution model at A from beam profiles measured at B. We propose to use an iterative method which consists in: - defining a parametric model describing the beam distribution in 4D transverse phase-space at a position A, - adjusting iteratively the model parameters by minimizing the difference between beam profiles measured at B and these obtained by transporting the beam generated according to the model with TraceWIN code from A to B. This method allows taking into account space-charge and other transport non-linearities.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-THPME056
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)
THPME057	Calculations of Halo in TraceWin Code	3361
	N. Pichoff, P.A.P. Nghiem, D. Uriot CEA/DSM/IRFU, France M. Valette CEA/IRFU, Gif-sur-Yvette, France
	The TraceWIN code is used to simulate the dynamics of the particles and to design linear particle accelerators. The growth of rms emittance along the accelerator is often used to estimate the quality of a design. For high beam powers, the aim is also to limit the production of halo in order to keep particle losses under a requested limit. We present in this article the different ways to quantify this halo in TraceWin.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-THPME057
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)
THPME058	Risk Analysis and Machine Protection of SIS100	3364
	C. Omet, M.S. Mandakovic, D. Ondreka, P.J. Spiller, J. Stadlmann GSI, Darmstadt, Germany
	To ensure safe functionality and reduce unneccessary shutdowns, a risk analysis of the main driver accelerator for the FAIR project SIS100, has been done. The analysis includes all major technical systems and was done accordingly to EN 61508. Results of the analysis and appropriate countermeasures for detection and/or mitigation of the failures are presented. Furthermore, an estimation of the accelerator‘s availability is given.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-THPME058
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)
THPME059	Preparation of the Coupled RFQ-IH-cavity for FRANZ	3367
	M. Heilmann, C. Claessens, O. Meusel, D. Mäder, U. Ratzinger, A. Schempp, M. Schwarz IAP, Frankfurt am Main, Germany
	The Frankfurt neutron source at the Stern-Gerlach-Zentrum (FRANZ) will provide ultra-short neutron pulses at high intensities and repetition rates. The neutrons will be produced using the 7Li(p, n)7Be reaction induced by a proton beam. The 175 MHz IH-type drift tube linac with 8 gaps succeeds a 4-rod-RFQ. Together they form a coupled linac combination with a length of 2.3 m and accelerate the protons from 120 keV to 2.03 MeV. As the RF losses add up to 200 kW, the cooling of both accelerators is a central challenge. The RFQ-IH combination is powered by a radio frequency amplifier, which couples the RF power into the RFQ. The two structures are connected via inductive coupling. The initial beam operation of the accelerators is configured for 50 mA in cw mode. The IH-components were fabricated, RF tuning measurements are underway. The RFQ and the IH-DTL will be conditioned separately and then be connected, aiming for a beam operation at the end of 2014. A main challenge in fabrication was the precise welding required for the water cooled drift tubes and stems.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-THPME059
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)
THPME060	Malfunction, Cause and Recurrence Prevention Measures of J-PARC Slow Extraction	3370
	M. Tomizawa, T. Kimurapresenter, H. Nakagawa, K. Okamura KEK, Ibaraki, Japan
	The radiation leakage accident occurred at the J-PARC hadron experimental hall in May 2013 was triggered by a target damage due to an unanticipated short beam pulse from J-PARC main ring. An extremely short beam pulse was produced by a rapid current increase of the quadrupole (EQ) power supply system for a spill feedback. A simulation with the slow extraction process could explain such a short beam pulse generation. The cause of the malfunction has been identified by an intensive investigation of the EQ power supply system performed after the accident. We will show measures to prevent recurrence.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-THPME060
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)
THPME061	Present Status of J-PARC - after the Shutdown due to the Radioactive Material Leak Accident-	3373
	T. Koseki KEK, Ibaraki, Japan K. Hasegawa JAEA/J-PARC, Tokai-mura, Japan
	In J-PARC, a radioactive material leak accident occurred at the Hadron Experimental Facility on May 23, 2013. The accident was triggered by a malfunction of the slow extraction system of the Main Ring synchrotron. After seven-month long shutdown due to the accident, beam operation of the linac was restarted in December 2013. In this paper, the most recent status of the beam operation is presented.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-THPME061
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)
THPME062	Status of the J-PARC Ring RF Systems	3376
	M. Yoshii, M. Nomura, T. Shimada, F. Tamura, M. Yamamoto KEK/JAEA, Ibaraki-Ken, Japan E. Ezura, K. Hara, K. Hasegawa, C. Ohmori, K. Takata, M. Toda KEK, Ibaraki, Japan A. Schnase GSI, Darmstadt, Germany
	The high intensity proton accelerator complex (J-PARC) consists of the Linac, the 25Hz rapid cycling synchrotron (RCS) and the 50GeV main synchrotron (MR). During the long shutdown of 2013, the Linac energy was upgraded from 181MeV to the design value of 400MeV. In the RCS, we have installed the last 12th RF system. In operation from January 2014, beam commissioning aimed at 1 MW operation will be started. In the MR, the upgrade plan of the beam power, realizing by raising the repetition, has been started. For this reason the accelerating voltage must be increased, and all MR RF systems will be replaced with more efficient systems. A new magnetic alloy material (FT3L) has been developed. Manufacturing of the FT3L accelerating cavities has proceeded. It becomes possible to increase the accelerating voltage from 280 kV to 540 kV, using the new cavities in combination with the existing RF power supplies. We have started the developments of a 2nd harmonic system loaded with air-cooled FT3L cores and a high-Q VHF cavity system, too. Both systems are used for longitudinal dilution increase the bunching factor of the circulating high intensity proton beam.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-THPME062
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)
THPME063	Residual Dose with 400 MeV Injection Energy at J-PARC Rapid Cycling Synchrotron	3379
	K. Yamamoto, N. Hayashi, M. Kinshopresenter JAEA/J-PARC, Tokai-Mura, Naka-Gun, Ibaraki-Ken, Japan
	Last summer shutdown J-PARC RCS injection energy was upgraded from 181 MeV to 400 MeV. We report the effect of the injection energy upgrade on the residual dose in the RCS.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-THPME063
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)
THPME064	Progress and Status of the J-PARC 3GeV RCS	3382
	M. Kinsho JAEA/J-PARC, Tokai-mura, Japan
	Big issue for the J-PARC 3GeV RCS was displacement of main magnets caused by last big earthquake because this made beam loss more than 400 kW beam power. Since realignment of main magnet and other components was essential to realize higher beam power and stable operation, this work has been done last maintenance period. To minimize amount of realignment work, we decided that not all components moved to designed regular potions but also minimum components moved to the position which was secured design acceptance 486 π mm mrad. Almost all components which are main magnets, rf cavities, and extraction magnets had to be moved in the range of 10 mm for horizontal, 3 mm for vertical and 9 mm for longitudinal, respectively. It was not necessary for the components installed in injection straight line to move because displacement of these components was less than ± 0.2 mm. At same time 400 MeV injection upgrade work should be done. Beam commissioning is planned from the middle of January 2014. The progress and status of the RCS in J-PARC are presented.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-THPME064
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)
THPME065	Beam Test of the CERN PSB Wide-band RF System Prototype in the J-PARC MR	3385
	F. Tamura JAEA/J-PARC, Tokai-mura, Japan K. Hasegawa, C. Ohmori, M. Yoshii KEK, Tokai, Ibaraki, Japan M.M. Paoluzzi CERN, Geneva, Switzerland
	In the framework of the LHC Injectors Upgrade project (LIU), a complete replacement of the existing narrow-band rf systems of CERN PSB with wide-band magnetic alloy (MA) loaded rf systems is in progress. A single gap MA loaded rf system prototype, which uses solid-state power amplifier and includes fast rf feedback for beam loading compensation, has been installed in the J-PARC MR to investigate the system behavior with high intensity proton beams. We report the wake voltage measurement results with and without fast rf feedback. In addition to the fast feedback, the rf feedforward method is under consideration to compensate the heavy beam loading more effectively. Preliminary beam test results with feedforward are also presented.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-THPME065
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)
THPME067	Air Stripper for Intense Heavy Ion Beams	3388
	H. Imao RIKEN Nishina Center for Accelerator-Based Science, Wako, Saitama, Japan M. Fujimaki, N. Fukunishi, H. Hasebe, O. Kamigaito, M. Kase, H. Kuboki, H. Okuno, Y. Yano RIKEN Nishina Center, Wako, Japan
	Intensity upgrade of very heavy ions such as uranium or xenon beams is one of the main concerns at the RIKEN Radioactive Isotope Beam Factory (RIBF). The lifetime problem of carbon-foil strippers due to the high energy loss of beams was a principal bottleneck for the intensity upgrade. We have already developed and successfully operated a re-circulating He-gas stripper for 10-MeV/u uranium beams as an alternative to carbon foils. Recently, the 2nd gas stripper with air dedicated for 50-MeV/u 124Xe beams was developed. The differential pumping techniques similar to that used in the He gas stripper was applied. We confined a very thick gas target, up to 20~mg/cm2 of air, in a 0.5-m target chamber. One good feature of using air is that it can be inexhaustible for our use. The stripper was stably operated in user runs performed in June 2013. The service rate reached 91\%. The maximum beam intensity reached 38~pnA and the average intensity provided to users becomes approximately four times higher than it was in 2012. The down-time free gas strippers greatly contributed to these improvements. We also discuss the applicability of the air stripper to 50-MeV/u 238U beams.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-THPME067
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)
THPME068	Optics Design of the High-power Proton Synchrotron for LAGUNA-LBNO	3391
	Y. Papaphilippou, J. Alabau-Gonzalvo, A. Alekoupresenter, F. Antoniou, I. Efthymiopoulos, R. Steerenberg CERN, Geneva, Switzerland
	Funding: Work supported by EC/FP7 grant 284518 The prospects for future high-power proton beams for producing neutrinos at CERN within the LAGUNA-LBNO study, include the design of a 2 MW High-Power Pro- ton Synchrotron (HP-PS). In this paper, the optics design of the ring is reviewed, comprising Negative Momentum Compaction (NMC) arc cells and quadrupole triplet long straight sections, flexible enough to achieve the constraints imposed mainly by different beam transfer equipment and processes. A global tunability study is undertaken includ- ing aperture and magnet parameter considerations. Basic correction systems are specified and their impact to beam dynamics including dynamic aperture is finally evaluated.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-THPME068
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)
THPME069	Performance Studies of the SPS Beam Dump System for HL-LHC Beams	3394
	F.M. Velotti, O. Aberle, C. Braccopresenter, E. Carlier, F. Cerutti, K. Cornelis, L. Ducimetière, B. Goddard, V. Kain, R. Losito, C. Maglioni, M. Meddahi, F. Pasdeloup, V. Senaj, G.E. Steele CERN, Geneva, Switzerland
	The Super Proton Synchrotron (SPS) beam dump system is a concern for the planned High Luminosity LHC (HL-LHC) operation. The system has initially been designed for very different beam parameters compared to those which will reign after the completion of the LHC injectors upgrade, when the SPS will have to operate with unprecedented beam brightness. This paper describes the relevant operational and failure modes of the dump system together with the expected beam loading levels. Tracking studies are presented, considering both normal operation and failure scenarios, with particular attention on the location and level of proton losses. First FLUKA investigations and thermo-mechanical analysis of the high-energy absorber block are described
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-THPME069
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)
THPME070	Status of the LIU Project at CERN	3397
	K. Hanke, H. Damerau, A. Deleu, A. Funken, R. Garoby, S.S. Gilardoni, N. Gilbert, B. Goddard, E.B. Holzer, A.M. Lombardi, D. Manglunki, M. Meddahi, B. Mikulec, E.N. Shaposhnikova, M. Vretenar CERN, Geneva, Switzerland
	CERN has put in place an ambitious improvement programme to make the injector chain of the LHC capable of supplying the high intensity and high brightness beams requested by the High-Luminosity LHC (HL-LHC) project. The LHC Injectors Upgrade (LIU) project comprises a new Linac (Linac4) as well as major upgrades and renovations of the PSB, PS and SPS synchrotrons. The heavy ion injector chain is also included, adding Linac3 and LEIR to the list of accelerators concerned. This paper reports on the work completed during the first long LHC shutdown, and outlines the further upgrade path.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-THPME070
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)
THPME071	Injection and Extraction Systems for a High-Power Proton Synchrotron at CERN	3400
	W. Bartmann, V. Fedosseev, B. Goddard, T. Kramerpresenter CERN, Geneva, Switzerland
	A new High-Power Proton Synchrotron (HP-PS) is being studied at CERN for the second phase of the Long Baseline Neutrino facility (LAGUNA-LBNO) where a 2 MW beam power shall impinge onto a target. A 4 GeV H− injection based on foil stripping and extendable to laser-assisted magnet stripping is described. The proposed laser-assisted stripping is assessed with regard to the laser power requirements. The feasibility of a fast extraction system at 75 GeV is presented.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-THPME071
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)
THPME072	Delivery of Special Magnets for the MedAustron Project	3403
	T. Kramer, M.G. Atanasov, R.A. Barlow, M.J. Barnes, J. Borburgh, L. Ducimetière, T. Fowler, M. Hourican, V. Mertens, A. Prost CERN, Geneva, Switzerland T. Stadlbauer EBG MedAustron, Wr. Neustadt, Austria
	Ten different types of kickers, bumpers, and electrostatic and magnetic septa, along with certain power supplies and associated control system components, have been designed in a collaboration between CERN and MedAustron for an ion therapy centre in Wr. Neustadt (Austria). This paper focuses on the status of the special magnets work package and the improvements applied during the production. The design parameters are compared with data from measurements, hardware tests and initial commissioning. The major factors contributing to the successful completion of the work package are highlighted.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-THPME072
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)
THPME073	Performance of the Low Energy Beam Transport at the RAL Front End Test Stand	3406
	J.J. Back University of Warwick, Coventry, United Kingdom D.C. Faircloth, A.P. Letchford STFC/RAL, Chilton, Didcot, Oxon, United Kingdom C. Gabor STFC/RAL/ASTeC, Chilton, Didcot, Oxon, United Kingdom S.R. Lawriepresenter STFC/RAL/ISIS, Chilton, Didcot, Oxon, United Kingdom J.K. Pozimski Imperial College of Science and Technology, Department of Physics, London, United Kingdom
	The Front End Test Stand (FETS) at the Rutherford Appleton Laboratory (RAL) is intended to demonstrate the early stages of acceleration (0-3 MeV) and beam chopping required for high power proton accelerators, including proton drivers for pulsed neutron spallation sources and neutrino factories. A Low Energy Beam Transport (LEBT), consisting of three solenoids and four drift sections, is used to transport the H− beam from the ion source to the Radio Frequency Quadrupole (RFQ). We present the current performance of the LEBT with regards to beam alignment, transmission and focusing into the acceptance of the RFQ.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-THPME073
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)
THPME075	FNAL - The Proton Improvement Plan (PIP)	3409
	W. Pellico, K.A. Domann, F.G. Garcia, K. E. Gollwitzer, K. Seiyapresenter, R.M. Zwaska Fermilab, Batavia, Illinois, USA
	Funding: The United States Department of Energy The FNAL Proton Source is currently undergoing a major improvement effort. A plan has been developed and is underway to increase Proton Source throughput while maintaining good availability and acceptable residual activation. The plan addresses hardware modifications to increase repetition rate and improve beam loss while ensuring viable operation of the proton source through 2025. The PIP goals will enable Linac/Booster to: Deliver 2.25·1017 protons per hour with a 15 HZ cycle rate Availability greater than 85% Maintain residual activation at acceptable levels. The work has been progressing on schedule and is expected to finished by 2018.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-THPME075
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)
THPME076	Oscillating Wire as a “Resonant Target” for Beam Transversal Gradient Investigation	3412
	S.G. Arutunian, A.V. Margaryan ANSL, Yerevan, Armenia
	Measurements of reflected/generated on oscillating wire secondary particles/photons in synchronism with oscillating wire frequency are proposed to done. The differential signal on wire maximal deviations at oscillation process can provide a fast signal proportional to beam profile gradient. Idea of usage of such “Resonant Target” for beam transversal gradient investigation was tested with lightening the oscillating wire by a laser.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-THPME076
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)
THPME077	Complex Beam Profile Reconstruction, A Novel Rotating Array of Vibrating Wires	3415
	S.G. Arutunian ANSL, Yerevan, Armenia J.R. Alonso LBNL, Berkeley, California, USA
	Proton/ion beams of multiple charge/mass ratio can be very complex. Orthogonal X-Y projections are often inappropriate to represent these profiles. An array of vibrating wires, rotating around the beam axis is under development. The mechanical implementation is described. An algorithm to reconstruct the profile is proposed. The tradeoffs between the number of wires, the rotation angles, the response time and the profile resolution are discussed.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-THPME077
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)
THPME079	Beam Diagnostics and Control for the AREAL RF Photogun Linac	3418
	G.A. Amatuni, B. Grigoryan, A. Lorsabyan, N. Martirosyan, V. Sahakyan, A. Sargsyan, A.V. Tsakanian, A. Vardanyan, G.S. Zanyanpresenter CANDLE SRI, Yerevan, Armenia K. Manukyan YSU, Yerevan, Armenia
	Advanced Research Electron Accelerator Laboratory (AREAL) based on photo cathode RF gun is under construction at CANDLE. In current stage the gun section is under commissioning (phase 1). This paper presents the main characteristics of gun section beam diagnostics and the architecture of AREAL control system. The diagnostic system includes the measurements of the beam main parameters and its longitudinal and transverse phase space characteristics. The results of the facility first phase commissioning are summarized from the beam diagnostic and control point of view.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-THPME079
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)
THPME080	Reflective Streak Camera Bunch Length Measurements at the Australian Synchrotron	3421
	M.J. Boland, Y.E. Tan SLSA, Clayton, Australia T.M. Mitsuhashi KEK, Ibaraki, Japan
	The bunch length of the 3 GeV electron storage ring at the Australian Synchrotron has been measured using reflective input optics feeding a streak camera. An Offner optical design was employed to reduce the chromatic broadening of the input optics of the streak camera. Using the reflective input optics the bunch length is measured to be 15% shorter than with the refractive input optics. The measured bunch length is now in good agreement with the model of the storage ring and the values are being used for calibration, monitoring and optimisation of the machine. The results of studies to characterise the streak camera shall also be presented.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-THPME080
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)
THPME081	Plans for an Australian XFEL Using a CLIC X-band Linac	3424
	M.J. Boland, T.K. Charles, R.T. Dowd, G. LeBlanc, Y.E. Tan, K.P. Wootton, D. Zhu SLSA, Clayton, Australia R. Corsini, A. Grudiev, A. Latina, D. Schulte, S. Stapnes, I. Syratchev, W. Wuensch CERN, Geneva, Switzerland
	Preliminary plans are presented for a sub-Angstrom wavelength XFEL at the Australian Synchrotron light source site. The design is based around a 6 GeV x-band linac from the CLIC Project. One of the motivations for the design is to have an XFEL co-located on the site with existing storage ring based synchrotron light source. The desire and ability of the Australian photon science community to win beamtime on existing XFELs has lead to this design study to plan for a future machine in Australia. The technology choice is also driven by the Australian participation in the CLIC Collaboration and the local HEP community.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-THPME081
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)
THPME082	Sirius Diagnostic Beamlines	3427
	N. Milas, L. Liu, A.R.D. Rodrigues LNLS, Campinas, Brazil
	Sirius is a 3 GeV synchrotron light source that is being built by the Brazilian Synchrotron Light Laboratory (LNLS). It will be part of a novel class of light sources with emittances in the sub-nm level. Both horizontal and vertical beam sizes at the dipoles will be of the order of or below 10μm, creating difficulties for measuring them using conventional techniques. This paper proposes a series of beamlines using different techniques that, combined, will be able not only to resolve beam sizes, but also measure energy spread and local transverse coupling in the storage ring.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-THPME082
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)
THPME083	BPM Data Correction at SOLEIL	3430
	N. Hubert, B. Béranger, L.S. Nadolskipresenter SOLEIL, Gif-sur-Yvette, France
	In a synchrotron light source like SOLEIL, Beam Position Monitors (BPM) are optimized to have the highest sensitivity for an electron beam passing nearby their mechanical center. Nevertheless, this optimization is done to the detriment of the response linearity when the beam is off-centered for dedicated machine physic studies. To correct for the geometric non-linearity of the BPM, we have applied an algorithm using boundary element method. Moreover the BPM electronics is able to provide position data at a turn-by-turn rate. Unfortunately the filtering process in this electronics mixes the information from one turn to the neighboring turns. An additional demixing algorithm has been set-up to correct for this artefact. The paper reports on performance and limitations of those two algorithms that are used at SOLEIL to correct the BPM data.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-THPME083
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)
THPME086	Optical Fiber Beam Loss Monitor for the PHIL and ThomX Facilities	3433
	I. Chaikovska, L. Burmistrov, N. Delerue, A. Variola LAL, Orsay, France
	Fiber beam loss monitor (FBLM) is an attractive solution to measure intensity and position of the beam losses in the real time. It is a very useful tool, especially, for the commissioning and beam alignment. In this article we report on the development of the FBLM at PHIL (PHotoinjector at LAL, Orsay, France) as a prototype of the beam loss monitor for the ThomX machine, the compact Compton based X-ray source being in the construction phase in Orsay.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-THPME086
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)
THPME088	Study of Phase Reconstruction Techniques applied to Smith-Purcell Radiation Measurements	3436
	N. Delerue, J. Barros, M. Vieille Grosjean LAL, Orsay, France O.A. Bezshyyko, V. Khodnevych National Taras Shevchenko University of Kyiv, The Faculty of Physics, Kyiv, Ukraine
	Funding: Work supported by the France-Ukraine high energy physics laboratory and by the Université Paris-Sud (programme “attractivité") and the French ANR (contract ANR-12-JS05-0003-01). Measurements of coherent radiation at accelerators typically give the absolute value of the beam profile Fourier transform but not its phase. Phase reconstruction techniques such as Hilbert transform or Kramers Kronig reconstruction are used to recover such phase. We report a study of the performances of these methods and how to optimize the reconstructed profiles.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-THPME088
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)
THPME089	On the Suitability of Longitudinal Profile Measurements using Smith-Purcell Radiation for Short High Current Proton Beams	3439
	J. Barros, N. Delerue, M. Vieille Grosjean LAL, Orsay, France I. Dolenc Kittelmann ESS, Lund, Sweden C.A. Thomas Lund University, Lund, Sweden
	Funding: Financially supported by the Université Paris-Sud (programme "attractivité") and the French ANR (contract ANR-12-JS05-0003-01). The use of Smith-Purcell radiation to measure electrons longitudinal profiles has been demonstrated at several facilities in the picosecond and sub-picosecond range. There is a strong interest for the development of non intercepting longitudinal profile diagnostics for high current proton beams. We present here results of simulations on the expected yield of longitudinal profile monitors using Smith-Purcell radiation for such proton beams.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-THPME089
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)
THPME090	Fast Luminosity Monitoring using Diamond Sensors for the Super Flavor Factory SuperKEKB	3442
	D. El Khechen, P. Bambade, D. Jehanno, C. Rimbault LAL, Orsay, France
	Super luminous flavor factories, as SuperKEKB in Japan, aim to achieve very high luminosity thanks to a newly employed concept, the nano-beam scheme, where ultra-low emittance beams collide at very large crossing angle . Luminosity optimisation and dynamic imperfections require fast luminosity measurements. The aimed precision, 10-3 in 10 ms, can be achieved thanks to the very large cross-section of the radiative Bhabha process at zero-photon scattering angle. As a result of huge particle fluxes, diamond sensors are chosen to be placed just outside the beam-pipe, downstream of the interaction point, at locations with event rates consistent with the aimed precision and small enough contamination by backgrounds from single-beam particle losses . We will present the results concerning the investigation of the optimal positioning of our diamond sensors, taking into account the rate of Bhabha particles, their interactions with the beam pipe material.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-THPME090
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)
THPME091	Beam Halo Measurements using Wire Scanners at ATF2	3445
	S. Liu, P. Bambade LAL, Orsay, France S. Bai, J. Gao, D. Wang IHEP, Beijing, People's Republic of China A. Faus-Golfe, N. Fuster-Martínez IFIC, Valencia, Spain T. Tauchi, N. Terunuma KEK, Ibaraki, Japan
	Funding: Chinese Scholarship Council, FPA2010-21456-C02-01 and i-link 0704 Beam halo hitting on the beam pipe after the Interaction Point (IP) can generate a large amount of background for the measurements of the nano meter beam size using the laser interferometer beam size monitor (Shintake monitor) at ATF2. In order to investigate the beam halo transverse distribution, a diamond detector will be installed downstream of the IP. A feasibility study of a transverse halo collimation system to reduce the background for these measurements is also in progress. Prior to the diamond detector installation, a first attempt of beam halo measurements have been performed in 2013 using the currently installed wire scanners. Modeling of the beam halo distribution in the extraction (EXT) line was done and compared with the old modeling for ATF. Beam halo measurements were also done using the post-IP wire scanner to investigate the beam halo distribution at post-IP. Work supported by Chinese Scholarship Council, FPA2010-21456-C02-01 and i-link 0704
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-THPME091
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)
THPME092	Status of Diamond Detector Development for Beam Halo Investigation at ATF2	3449
SUSPSNE070	use link to see paper's listing under its alternate paper code
	S. Liu, P. Bambade, F. Bogard, J-N. Cayla, H. Monard, C. Sylvia, T. Vinatier LAL, Orsay, France N. Fuster-Martínez IFIC, Valencia, Spain I. Khvastunov National Taras Shevchenko University of Kyiv, The Faculty of Physics, Kyiv, Ukraine T. Tauchi, N. Terunuma KEK, Ibaraki, Japan
	Funding: Chinese Scholarship Council We are developing a diamond detector for beam halo and Compton spectrum diagnostics after the interaction point (IP) of ATF2, a low energy (1.3 GeV) prototype of the final focus system for ILC and CLIC linear collider projects. Tests of a 500 μm thick sCVD diamond detector with a dimension of 4.5 mm×4.5 mm have been carried out with radioactive sources and with electron beam from PHIL low energy (<10 MeV) photo-injector at LAL. The tests at PHIL were done with different beam intensities in air, just after the exit window at the end of the beam line, to test the response of the diamond detector and the readout electronics. We have successfully detected signals from single electrons, using a 40 dB amplifier, and from an electron beam of 108 electrons, using a 24 dB attenuator. A diamond sensor with 4 strips has been designed and fabricated for installation in the vacuum chambers of ATF2 and PHIL, with the aim to scan both the beam halo (with 2 strips of 1.5 mm×4 mm) and the beam core (with 2 strips of 0.1 mm×4 mm) transverse distributions.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-THPME092
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)
THPME093	Reconstruction of Longitudinal Electrons Bunch Profiles at FACET, SLAC	3453
SUSPSNE079	use link to see paper's listing under its alternate paper code
	M. Vieille Grosjean, J. Barros, N. Delerue, S. Jenzer LAL, Orsay, France F. Bakkali Taheri, G. Doucas, I.V. Konoplev, A. Reichold JAI, Oxford, United Kingdom C.I. Clarke SLAC, Menlo Park, California, USA
	The E-203 collaboration is testing a device on FACET at SLAC to measure the longitudinal profile of electron bunches using Smith-Purcell radiation. At FACET the electron bunches have an energy of 20GeV and a duration of a few hundred femtoseconds. Smith-Purcell radiation is emitted when a charged particle passes close to the surface of a metallic grating. The set-up installed in FACET consists in four targets (three gratings and a blank) on a carrousel on one side and eleven pyroelectric detectors on the opposite side, the beam passing between. At the moment, the measurement is averaged over a hundred pulses or more. We have studied the stability of the measurement from pulse to pulse and the resolution of the measure depending on the number of grating used.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-THPME093
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)
THPME094	Measurement of Low-charged Electron Beam with a scintillator Screen	3456
	T. Vinatier, P. Bambade, C. Bruni, S. Liu LAL, Orsay, France
	Measuring electron beam charge lower than 1pC is very challenging since the traditional diagnostics, like Faraday Cup and ICT, are limited in resolution to a few pC. A way to simply measure lower charge would be to use the linear relation, existing before saturation regime, between the incident charge and the total light intensity emitted by a YAG screen. Measurement has been performed on PHIL accelerator at LAL, with charge lower than 50pC, with a YAG screen located just in front of a Faraday Cup. It shows a very good linear response of the YAG screen up to the Faraday Cup resolution limit (2pC) and therefore allows calibrating the YAG screen for lower charge measurement with an estimated precision of 4%. A noise analysis allows estimating the YAG screen resolution limit around 40fC. Results of low charge measurement on PHIL will be shown and compared to those coming from a diamond detector installed on PHIL, in order to validate the measurement principle and to determine its precision and resolution limit. Such simple measurement may thereafter be used as single-shot charge diagnostic for electron beam generated and accelerated by laser-plasma interaction.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-THPME094
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)
THPME095	Length Measurement of High-brightness Electron Beam thanks to the 3-Phase Method	3459
SUSPSNE080	use link to see paper's listing under its alternate paper code
	T. Vinatier, C. Bruni, S. Chancé, P.M. Puzo LAL, Orsay, France
	The goal of 3-phase method is to determine the length of an electron beam without dedicated diagnostics by varying the measurement conditions of its energy spread, through a change in the RF phase of an accelerating structure. The originality here comes from the fact that it is applied on high-brightness electron beams of few MeV generated by RF photo-injectors. It allows testing the accuracy of 3-phase method, since the length to reconstruct is known as being that of the laser pulse generating the beam. It requires establishing the longitudinal transfer matrix of a RF photo-injector, which is difficult since the electron velocity vary from 0 to relativistic during its path*. The 3-phase method in RF photo-injector has been simulated by ASTRA and PARMELA codes, validating the principle of the method. First measurement has been done on PHIL accelerator at LAL, showing a good agreement with the expected length. I will then show results obtained at PITZ with a standing wave booster and a comparison with those coming from a Cerenkov detector. Finally, measurements at higher energy performed on the SOLEIL LINAC with travelling wave accelerating structures will be exposed. * : K-J. Kim, “RF and Space Charge Effects in Laser-Driven RF Electron Guns”, Nucl. Instr. Meth., A275, 201 (1989)
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-THPME095
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)
THPME096	Goubau Line Beam Instrumentation Testing, The Benefits	3462
	F. Stulle, J.F. Bergoz BERGOZ Instrumentation, Saint Genis Pouilly, France J. Musson JLab, Newport News, Virginia, USA
	At JLab and Bergoz Instrumentation Goubau lines are used for beam instrumentation testing. A Goubau line differs fundamentally from standard bench testing techniques in the way it produces the electromagnetic fields which interact with the DUT. This allows to acquire complementary information about DUT characteristics. Consequently, we improve our knowledge about the DUT. At JLab BPM responses have been successfully mapped and at Bergoz Instrumentation high frequency behavior of current transformers is under study. We present results, highlight benefits and outline ideas for future studies of additional accelerator components.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-THPME096
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)
THPME097	Schottky Diode Detectors for Monitoring Coherent THz Synchrotron Radiation Pulses	3465
	A. Semenov, H.-W. Hübers, A. Pohl DLR, Berlin, Germany O. Cojocari, M. Sobornytskyy ACST GmbH, Hanau, Germany A. Hoehl, R. Müllerpresenter PTB, Berlin, Germany M. Ries, G. Wüstefeld HZB, Berlin, Germany
	Coherent synchrotron radiation (CSR) in the terahertz frequency range is a powerful tool for the diagnostics of the electron-beam relying on the fact that the emission spectrum of THz CSR depends on the shape of the electron bunch from which the radiation is emitted. Among available direct THz detectors only superconducting microbolometers and Schottky diodes are capable to resolve single CSR pulses. Here we present recent photoresponse measurements of CSR with a quasioptical zero-bias Schottky diode detector which was produced at ACST GmbH. The rise-time of the recorded real-time transient was limited to approximately 20 ps by the 18-GHz bandwidth of interconnecting cables. Non-saturated responsivity of the detector, that is the amplitude of the voltage transient referred to the total CSR pulse energy in the detector quasioptical mode, was approximately 1.5 mV/fJ. The dynamic range of the detector spans almost three orders of magnitude from 3 fJ to 1 pJ. The intrinsic jitter of the detector was less than 2 ps thus not affecting the effective time resolution and allowing us to measure the arrival-time jitter of CSR pulses for different settings of the storage ring parameters.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-THPME097
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)
THPME098	Set up of a Synchrotron Light Monitor at the 2.5 GeV Booster Synchrotron at ELSA	3468
	T. Schiffer Uni Bonn, Bonn, Germany P. Hänisch, W. Hillert, M.T. Switka ELSA, Bonn, Germany
	For the upgrade of the accelerator facility ELSA towards higher stored beam currents, a non-destructive beam analysis is being implemented at the 2.5 GeV booster synchrotron. It is a fast ramping combined function synchrotron with an extraction repetition rate of 50 Hz. Typically, beam currents of 10 mA are accelerated from 20 MeV to the extraction energy of 1.2 GeV within 8.6 ms, hence the magnetic field is increased by up to 85 T/s. A synchrotron light monitor as the primary diagnostic tool will be utilized for measuring the transversal position and intensity distribution of the beam. Its dynamics on the fast energy ramp is of distinct interest. The proposed set-up of the synchrotron light monitor and the current development are presented.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-THPME098
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)
THPME099	Synchrotron Radiation Diagnostics Performance at ELSA	3471
	M.T. Switka, F. Frommberger, P. Hänisch, W. Hillert, D. Proft, M. Schedlerpresenter, S. Zander ELSA, Bonn, Germany
	Funding: Work funded by the DFG within SFB/TRR16. The pulse stretcher ring ELSA delivers polarized and non-polarized electrons with an adjustable beam energy of 0.5 - 3.5 GeV to external experimental stations. To meet the growing demands of the user community regarding beam intensity and quality, the upgrade of vital accelerator components is an ongoing process. This includes the improvement of the beam diagnostics in order to resolve and monitor intensity and quality limiting effects. ELSA has recently been equipped with a diagnostic synchrotron radiation beamline housing a streak camera as main beam imaging device. It extends the diagnostics capabilities into the picosecond temporal resolution regime and captures fast longitudinal and transverse beam dynamics. The obtained measurements provide crucial feedback for further machine optimization. The overall performance of the streak camera system and machine relevant measurements are presented.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-THPME099
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)
THPME100	The Mechanical Design of the BPM Inter-tank Section for P-linac at FAIR	3474
	M.H. Almalki, R. M. Brodhage, P. Forck, W. Kaufmann, O.K. Kester, P. Kowina, T. Sieber GSI, Darmstadt, Germany M.H. Almalki, R. M. Brodhage, O.K. Kester IAP, Frankfurt am Main, Germany M.H. Almalki KACST, Riyadh, Kingdom of Saudi Arabia J. Balaguer CEA/IRFU, Gif-sur-Yvette, France P. Girardot, C.S. Simon CEA/DSM/IRFU, France
	At the planned Proton LINAC at the FAIR facility, four-fold button Beam Position Monitor (BPM) will be installed at 14 locations along the 30 m long FAIR p-LINAC. The LINAC comprises of crossbar H-mode (CH) cavity to accelerate a 70 mA proton beam up to 70 MeV at frequency of 325 MHz. At four locations, the BPMs will be an integral part of the inter-tank section between the CCH and CH cavities within an evacuated housing. As the BPM centre is only 48 mm apart from the upstream cavity boundary, the rf-background at the BPM position, generated by the cavity must be evaluated. In this paper the mechanical design of the BPM for the inter-tank section is presented and the rf-noise at the BPM location is discussed.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-THPME100
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)
THPME101	Considerations for a Cavity-Based Position-Sensitive Heavy Ion Detector for the CR at FAIR	3477
	X. Chen, P. Hülsmann, Yu.A. Litvinov, F. Nolden, M.S. Sanjari, M. Steck, T. Stöhlker GSI, Darmstadt, Germany X. Chen Heidelberg University, Heidelberg, Germany Yu.A. Litvinov MPI-K, Heidelberg, Germany J. Piotrowski AGH University of Science and Technology, Kraków, Poland T. Stöhlker HIJ, Jena, Germany
	Funding: Work funded by the European Commission (PITN-GA-2011-289485), the Alliance Program of the Helmholtz Association (HA216/EMMI), the Helmholtz-CAS Joint Research Group (HCJRG-108), the BMBF (05E12CD2). The Facility for Antiproton and Ion Research (FAIR) is a complex yet ongoing project which will allow for a broad range of experimental physics programs as well as a variety of material and medical applications. Being a heavy ion storage ring at FAIR, the Collector Ring (CR) is perfectly suitable for scientific investigations on fundamental properties – such as masses and lifetimes – of short-lived radioactive nuclei when it operates in isochronous mode. To fulfill stringent experimental requirements, a compatible heavy ion detector sensitive to beam intensities and positions is highly demanded. In this paper we present a conceptual design of cavity-based Schottky noise pickup to achieve non-destructive detections of stored particles. Computer-aided simulations follow immediately to justify the feasibility of such a design.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-THPME101
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)
THPME102	Beam-based Tests of Intercepting Transverse Profile Diagnostics for FAIR	3480
	P. Forck, C.A. Andre, C. Dorn, R. Haseitl, S. Lederer, A. Lieberwirth, S. Löchner, A. Reiter, M. Schwickert, T. Sieber, B. Walasek-Höhne, M. Witthaus GSI, Darmstadt, Germany W. Ensinger, S. Lederer, A. Lieberwirth TU Darmstadt, Darmstadt, Germany
	Funding: Partly funded by German Ministry of Science (BMBF), contract number 05P12RDRBJ. The FAIR facility will serve as a versatile accelerator for ions of energies between 100 MeV/u and 29 GeV/u with an intensity variation over more than 6 orders of magnitude. In the transport lines the transverse profile determination will be based mainly on intersecting methods: Scintillations screens, SEM-Grids, Multi-Wire-Proportional Chambers and possibly Optical Transition Radiation screens. The devices are tested at the existing SIS18 at GSI where ions are ex-tracted either in a fast mode (about 1 mus) or resonant mode within about typically 0.3 s. The imaging properties of scintillation screens of different materials (ceramics, phosphor screens and single crystals) with ion beams with energies above 300 MeV/u were investigated. Over intensities 105 to 109 particles per pulse the light yield for the screens is linear with respect to the ion intensity. Moreover, the radiation resistance of the screens was tested. The applicability of optical transition radiation for beams of velocities below 90%c was investigated systematically with heavy ions. The experimental results are compared to wire-based methods obtained with SEM-Grids and MWPCs.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-THPME102
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)
THPME103	Beam Current Monitors for FAIR	3483
	M. Schwickert, H. Bräuning, F. Kurian, H. Reeg, A. Reiter GSI, Darmstadt, Germany R. Geithner, W. Vodel HIJ, Jena, Germany R. Neubert FSU Jena, Jena, Germany
	The FAIR (Facility for Antiproton and Ion Research) accelerator facility presently under construction at GSI will supply a wide range of beam intensities for physics experiments. Design beam intensities range from 2.5·1013 protons/cycle to be delivered to the pBar-target and separator for production of antiprotons, to beams of e.g. 109 ions/s in the case of slowly extracted beams. The large intensity range demands for dedicated beam current monitors for precise, non-destructive beam intensity measurements in the synchrotrons, transport lines and storage rings of the FAIR facility. This report describes GSI developments of purpose-built beam current monitors for the SIS100 synchrotron and high-energy beam transport lines (HEBT) of FAIR. Prototype measurements with a SQUID-based Cryogenic Current Comparator and a resonant beam charge transformer are presented, and possibilities for further upgrades are discussed.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-THPME103
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)
THPME104	Investigation of Beam Instabilities at DELTA using Bunch-by-bunch Feedback Systems	3486
	M. Höner, S. Hilbrich, H. Huck, M. Huck, S. Khan, C. Mai, A. Meyer auf der Heide, R. Molo, H. Rast, M. Sommer, P. Ungelenk DELTA, Dortmund, Germany
	Funding: Work supported by the BMBF (05K13PEC). At the 1.5-GeV electron storage ring DELTA operated by the TU Dortmund University as a synchrotron radiation user facility, bunch-by-bunch feedback systems are in use for electron beam diagnostics and for the suppression of multibunch instabilities. An automatic readout of bunch position data allows a real-time modal analysis during machine operation. An excitation of particular multibunch modes enables the determination of growth and damping times for all modes independently. Further investigations of beam stability and natural damping times of all modes even below the instability threshold have been performed. In addition, first bunch-by-bunch data taken from the booster synchrotron are shown.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-THPME104
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)
THPME106	Compact Integrated THz Spectrometer in GaAs Technology for Electron Bunch Compression Monitor Applications	3489
	N. Neumann, M. Laabs, D. Plettemeier, M. Schiselski TU Dresden, Dresden, Germany M. Gensch, B.W. Green, S. Kovalev HZDR, Dresden, Germany
	Funding: BMBF 05K13ODB Bunch compression monitors are essential for the efficient operation of linear accelerators. The spectral distribution of coherently generated THz radiation is a favorable measure for the shape of the electron bunches. Today, THz spectrometers are bulky and costly. Here, the concept of an integrated on-chip semiconductor spectrometer being developed in a joint effort by HZDR and TU Dresden within the scope of the BMBF project InSEl is presented. This potentially low-cost and compact solution based on Schottky diode detectors, integrated on-chip THz antennas and filters fabricated in a commercial GaAs process will not exceed 5 mm in size replacing current single element THz detectors in the bunch compression monitors in the ELBE accelerator at HZDR. Covering the frequency range from 0.1 to 1.5 THz (and more in the future) with a resolution of 5 to 20 points, it could also be of interest for the longitudinal electron bunch diagnostic at other electron linacs such as FLUTE, BERLinPro, FLASH or the European X-FEL. Furthermore, the detector bandwidth in the GHz range supports the high repetition rates of superconducting radio frequency accelerators.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-THPME106
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)
THPME109	EOS at CW Beam Operation at ELBE	3492
	Ch. Schneider, M. Gensch, M. Kuntzsch, P. Michel, W. Seidel HZDR, Dresden, Germany P.E. Evtushenko JLab, Newport News, Virginia, USA Ç. Kaya Ankara University, Accelerator Technologies Institute, Golbasi / Ankara, Turkey A. Shemmary, N. Stojanovic DESY, Hamburg, Germany
	The ELBE accelerator is a super conduction electron cw machine located at the Helmholtz Center Dresden Rossendorf Germany with 1 mA current, now tested for up to 2 mA. Besides other important diagnostics for setting up the machine for user beam time and further improvement of the machine – a THz source is momentary under commissioning – a EOS measuring station for bunch length measurements is locate right behind the second super conducting Linac. Measuring with a crystal in the vicinity of an up to 2 mA cw beam implies higher beam loss and also higher radiation exposure of the crystal and hence also a safety risk for the UHV conditions of the super conducting cavities in the case of crystal damage. Therefore the EOS measuring principle is adapted to larger measuring distances and also for beam requirements with lower bunch charge at ELBE. A description of the setup, considerations of special boundary conditions and as well results for 13 MHz cw beam operation are presented.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-THPME109
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)
THPME112	Design of a Compact Setup to Measure Beam Energy by Detection of Compton Backscattered Photons at ANKA	3494
	C. Chang, D. Batchelor, E. Hertle, E. Huttel, V. Judin, A.-S. Müller, A.-S. Müller, A.-S. Müller, M.J. Nasse, M. Schuh, J.L. Steinmann KIT, Eggenstein-Leopoldshafen, Germany
	Funding: This work is funded by the European Union under contract PITN-GA-2011-289191 One of the most important parameters of accelerators is their beam energy. So far, the method of resonant depolarization was used to accurately determine the energy at 2.5 GeV of the ANKA electron storage ring, which, however, becomes cumbersome for lower energies. A good alternative is the detection of Compton backscattered photons, generated by laser light scattered off the relativistic electron beam. To achieve compactness and integration into the storage ring, the setup of transverse scattering is proposed instead of conventional head-on collision. The feasibility has been studied by comparison between simulations of Compton backscattered photons by AT and CAIN 2.35 and actual measurement of background radiation with an HPGe (High Purity Germanium) spectrometer. The layout of the setup is also included in the paper.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-THPME112
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)
THPME113	Commissioning of an Ultra-fast Data Acquisition System for Coherent Synchrotron Radiation Detection	3497
	C.M. Caselle, M. Brosi, S.A. Chilingaryan, T. Dritschler, E. Hertle, V. Judinpresenter, A. Kopmann, A.-S. Müller, J. Raasch, M. Schleicher, M. Siegel, N.J. Smale, J.L. Steinmann, M. Vogelgesang, M. Weber, S. Wuensch KIT, Eggenstein-Leopoldshafen, Germany
	The commissioning of a new real-time and high-accuracy data acquisition system suitable for recording individual ultra-short coherent pulses detected by fast terahertz detectors will be presented. The system is able to monitor turn-by-turn all buckets in streaming mode. The main board consists of a direct sampling board operating with a minimum sampling time of 3 psec and a time jitter less than 1.7 psec. The very low noise layout design combined with a wide dynamic range and bandwidth of the analog front-end allows to sample pulse signals generated by various GHz/THz detectors, like NbN and YBCO superconductor film detectors or zero biased Schottky Diode detectors. The digitized data is transmitted to the DAQ system by an FPGA readout board with a data transfer rate of 4 GByte/s. The setup is accomplished by a real-time data processing unit based on high-end graphics processors (GPUs) for on-line analysis of the frequency behaviour of the coherent synchrotron emissions. The system has been successfully used to study the beam properties of the ANKA synchrotron radiation source located at the Karlsruhe Institute of Technology and operating in the energy range between 0.5-2.5 GeV
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-THPME113
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)
THPME114	Commissioning and First Beam Measurements with a New Beam Diagnostics for Medical Electron Accelerators	3500
	D. Vlad Siemens AG Healthcare, H CP CV - Components and Vacuum, Erlangen, Germany G. Fischer Friedrich-Alexander Universität Erlangen-Nuernberg, University Erlangen-Nuernberg LFTE, Erlangen, Germany M. Hänel Siemens Healthcare, Erlangen, Germany
	A new beam diagnostics system was developed and built at the Siemens Healthcare Sector facility in Rudolstadt, Germany. The project goal was to develop, commission and operate a complete beam diagnostics system to fully characterize the compact medical linear electron accelerators. An overview of the whole system including the beam diagnostics, linear accelerator and control and supply unit is given. The system was successfully commissioned in July 2013. We report on initial experiences and first experimental results on current measurements, transverse beam size, transverse emittance and momentum and momentum distribution gained during the commissioning phase.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-THPME114
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)
THPME115	EUV Radiation Generated by a 5.7 MeV Electron Beam in Multilayer Periodical Structure	3503
	S.R. Uglov, A. Potylitsyn, L.G. Sukhikh, A.V. Vukolov TPU, Tomsk, Russia G. Kubepresenter DESY, Hamburg, Germany
	Funding: This work was partly supported by the by the Ministry of Education Science of the Russian Federation, contract 2.1799.2011. Recent experience from linac based FELs like LCLS or FLASH shows that transverse beam imaging based on optical transition radiation (OTR) might fail due to coherence effects in the OTR emission process. In order to overcome the problem it was proposed to use transition radiation (TR) in the EUV region*. For a reliable beam diagnostics however, an increase of the light output in the EUV region is required. One possibility to increase the radiation yield in the geometry of interest (target tilt angles 22.5 or 45 degrees) is to exchange the conventional monolayer target by a multilayer structure which acts as a multilayer X-ray mirror for EUV radiation. In this case, two radiation components are expected to contribute to the measured signal, diffracted transition radiation (DTR) and parametric radiation (PR)**. In this report we present results of an experimental investigation of EUV TR generated by a 5.7 MeV electron beam at monolayer and multilayer targets. The angular characteristics of the radiation was investigated and compared with theoretical models. * L.G. Sukhikh, S. Bajt, G. Kube et al., in Proc. IPAC'12, MOPPR019, New Orleans, Louisiana, USA, p.819 (2012) ** N.Nasonov, V.Kaplin, S.Uglov, e al., Phys. Rev. E 68 (2003) 036504
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-THPME115
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)
THPME116	Studies on a Diagnostic Pulse for FLASH	3506
	F. Mayet, R.W. Aßmann, S. Schreiber, M. Vogt DESY, Hamburg, Germany
	The long-term stability of the beam optics at FLASH is crucial for all connected experiments and the operation of the new second beamline FLASH2. It is therefore desirable to have a simple procedure to monitor the beam optics routinely and at the same time minimally invasive. This way user operation is not disturbed. An automated procedure, which has been successfully employed at the SLAC linac is presented in the context of FLASH. The betatron oscillations of selectively kicked pulses are recorded using BPMs at a fixed time interval. An online algorithm is then used to extract the betatron phase advance, as well as potential growth of the betatron oscillation amplitude and the Twiss parameters beta and alpha. Using this method, the long-term beam optics stability can be monitored in order to identify potential sources of drifts.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-THPME116
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)
THPME117	First Tests with the Self-triggered Mode of the New MicroTCA-based Low-charge Electronics for Button and Stripline BPMs at FLASH	3509
	F. Schmidt-Föhre, N. Baboi, G. Kuehn, B. Lorbeer, D. Nölle, K. Wittenburg DESY, Hamburg, Germany
	The FLASH facility at DESY is currently enhanced by a second beamline (FLASH2) to extend the capacity for user experiments. In addition, certain support systems like the timing system and the BPM system at the existing FLASH accelerator have been partly renewed and are now under commissioning. New button BPM electronics based on the MTCA.4 for physics standard is provided for the FLASH2 beamline and is foreseen as a replacement of the old BPM electronics at FLASH. Compared to the predecessor of the FLASH button BPM electronics, the new system has been specifically designed for low charge operation exceeding a wide dynamical charge range between 100pC and 3nC. Special provisions have been made to enable single bunch measurements in a self-triggered mode, enabling timing-system-independent measurements during commissioning and at fallback during normal operation.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-THPME117
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)
THPME118	A Freon-filled Bubble Chamber for Gamma-ray Detection in Strong Laser-plasma Interaction	3512
	W.B. Zhao, J.E. Chen, C. Lin, L.H.Y. Lu, X.Q. Yan, Y.Y. Zhao, B.Y. Zou PKU, Beijing, People's Republic of China
	When a laser pulse with focused intensity exceeding 1018W/cm2 interacts with a solid target, electrons in the focal spot are accelerated to relativistic velocity and where they generate inner-shell vacancies and hard x-ray(>10 keV) spectral line and Bremsstrahlung radiation. In laser plasma interactions, the resonance between betatron motion of electrons and ultraintense laser pulses is an interesting phenomenon in both electron acceleration and gamma photon production. Even though the gamma-ray synchrotron is micron scale, the energy ranges from ~1 MeV to ~102MeV. To detect the energy of the gamma-ray accurately is particularly significant. Owing to a lot of various energy of gamma-ray are emitted in femtosecond scale, which are impossible distinguished from each other on the time. A small freon-filled bubble chamber is being built to measure the energy spectrum of high-energy photons. After that, we can calculate the electron’s energy and then offer the data for various of electron acceleration theories. It combines a good spatial resolution with a large depth of field, allowing a large number of tracks. This improves the statistical quality of the photon spectrum.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-THPME118
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)
THPME119	Transverse emittance measurement at REGAE	3515
	S. Bayesteh Uni HH, Hamburg, Germany H. Delsim-Hashemi, K. Flöttmann DESY, Hamburg, Germany
	A new linac, named REGAE (Relativistic Electron Gun for Atomic Exploration) has been built at DESY and operates as an electron source for ultra-fast electron diffraction. An RF photocathode gun provides electron bunches of high coherence, sub-pC charge and energies of 2-5 MeV. In order to film time-resolved structural changes of excited specimens, bunch lengths of several femtoseconds need to be created. Taking into account these critical parameters, beam diagnostics at REGAE is very challenging. The existing diagnostics consists of energy, energy spread, beam profile, beam charge and emittance measurements. For transversal diagnostics, specific approaches have to be considered to overcome complications associated with the low charge and to carry out the beam diagnostics in single shot. In this paper, the contribution of the transversal diagnostics to the measurement of the transverse emittance is presented.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-THPME119
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)
THPME120	An Intensity Measurement Method based on Inorganic Scintillators and Optoelectronic Sensors	3518
SUSPSNE069	use link to see paper's listing under its alternate paper code
	A. Kechler, E. Feldmeier, Th. Haberer, A. Peters, C. Schömers HIT, Heidelberg, Germany
	The Heidelberg Ion Therapy Center (HIT) is a heavy ion accelerator facility located at the Heidelberg university hospital and intended for cancer treatment with heavy ions and protons. Currently ionization chambers with highly sensitive charge amplifiers are regularly used for intensity measurements of the high-energy ion beams. A new intensity measuring method will be presented based on the combination of fluorescent light from inorganic scintillators and an optoelectronic sensor with adjacent electronics as an alternative to the ionization chambers. A special measurement set-up with a large-area Si PIN-diode and adapted optics was investigated with respect to signal dynamics, resolution and linearity. The experimental results with proton and carbon beams will be presented in detail. Worth mentioning is a variation in sensitivity relating to the position of the beam spot, which could be reduced to some percent only.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-THPME120
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)
THPME121	The Status of the Diagnostic System at the Cryogenic Storage Ring CSR	3521
	M. Grieser, A. Becker, K. Blaum, S. George, C. Krantz, S. Vogel, A. Wolf, R. von Hahn MPI-K, Heidelberg, Germany
	The cryogenic storage ring (CSR) at MPI für Kernphysik is an electrostatic storage ring for low velocity phase space cooled ion beams. Among other experiments cooling and storage of molecular ions in their rotational ground state is projected. The stored beam current will be in the range of 1 nA - 1 μA. The resulting low signal strengths on the beam position pickups, current monitors and Schottky monitor put strong demands on these diagnostics tools. Methods and systems were developed to measure the profile of the ion beam. In the paper a summary of the CSR diagnostics tools and diagnosis of the first stored ion beam will be given.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-THPME121
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)
THPME122	A SQUID-based Beam Current Monitor for FAIR	3524
	R. Geithner, T. Stöhlker, W. Vodel HIJ, Jena, Germany R. Geithner, R. Neubert, P. Seidel FSU Jena, Jena, Germany F. Kurian, H. Reeg, M. Schwickert GSI, Darmstadt, Germany T. Stöhlker IOQ, Jena, Germany
	A Cryogenic Current Comparator (CCC) was developed for the upcoming FAIR-Project, providing a non-destructive online monitoring of the beam current in the nA-range. The CCC was optimized for a lowest possible noise-limited current resolution together with a high system bandwidth. Therefore, the low temperature properties of ferromagnetic core materials used in the pick-up coil were investigated and different SQUID-systems were tested. In this contribution we present results of the completed Cryogenic Current Comparator for FAIR working in a laboratory environment, regarding the improvements in resolution and bandwidth due to the use of suitable ferromagnetic core materials and optimized SQUID-system components.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-THPME122
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)
THPME123	Electro-optical Bunch Length Monitor for FLUTE: Layout and Simulations	3527
	A. Borysenko, E. Hertle, N. Hiller, V. Judin, B. Kehrer, S. Marsching, A.-S. Müller, M.J. Nasse, R. Rossmanith, R. Ruprecht, M. Schuh, M. Schwarz, P. Wesolowski KIT, Karlsruhe, Germany B. Steffen DESY, Hamburg, Germany
	Funding: This work is funded by the European Union under contract PITN-GA-2011-289191 A new compact linear accelerator FLUTE is currently under construction at Karlsruhe Institute of Technology (KIT) in collaboration with DESY and PSI. It aims at obtaining femtosecond electron bunches (~1fs - 300 fs) with a wide charge range (1 pC - 3 nC) and requires a precise bunch length diagnostic system. Here we present the layout of a bunch length monitor based on the electro-optic technique of spectral decoding using an Yb-doped fiber laser system (central wavelength 1030 nm) and a GaP crystal. Simulations of the electro-optic signal for different operation modes of FLUTE were performed and main challenges are discussed in this talk. This work is funded by the European Union under contract PITN-GA-2011-289191
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-THPME123
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)
THPME124	Spectral Analysis of Micro-Bunching Instabilities using Fast THz Detectors	3530
	J.L. Steinmann, E. Hertle, N. Hiller, V. Judinpresenter, A.-S. Müller, M. Schuh, P. Schönfeldt, P. Schütze KIT, Karlsruhe, Germany E. Bründermann Ruhr-Universität Bochum, Bochum, Germany
	Micro-bunching instabilities occur at synchrotron light sources when the particle density rises due to compression of the electron bunches. They lead to powerful bursts of coherent synchrotron radiation (CSR) in the THz range at the cost of very unstable intensity and spectral properties, highly fluctuating on a millisecond time scale. For interferometry this changing source demands a long averaging time to achieve a reasonably high signal-to-noise ratio or balancing by the use of an additional reference detector. In this study we present measurements taken by a Martin-Puplett-interferometer in the bursting regime with ultra-fast THz-detectors.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-THPME124
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)
THPME125	Electrical Field Sensitive High-Tc YBCO Detector for Real-time Observation of CSR	3533
	J. Raasch, K.S. Ilin, Y.-L. Mathis, A.-S. Müller, A. Scheuring, M. Siegel, N.J. Smale, P. Thoma KIT, Karlsruhe, Germany S. Bielawski, C. Evain, E. Roussel, C. Szwaj PhLAM/CERCLA, Villeneuve d'Ascq Cedex, France B. Holzapfel Karlsruhe Institute of Technology, Eggenstein-Leopoldshafen, Germany M. Hosaka, N. Yamamoto Nagoya University, Nagoya, Japan K. Iida Leibniz Institute for Solid State and Materials Research Dresden, Dresden, Germany M. Katoh, S.I. Kimura, T. Konomi UVSOR, Okazaki, Japan H. Zen Kyoto University, Kyoto, Japan
	Funding: We thank Agilent Technologies & Tektronix for supplying oscilloscopes. The work was supported by BMBF (05K2010), ANR (2010 blanc 042301), MEXT (Quantum Beam Tech. Prog.), IMS (Int. Collab. Prog.). High-Tc thin-film YBa2Cu3O7-x (YBCO) detectors were deployed for the real-time observation of Coherent Synchrotron Radiation (CSR). Due to enhanced fabrication techniques enabling the patterning of sub-μm sized detector areas responsivity values as high as 1V/pJ for pulsed THz excitations have been achieved at the ANKA synchrotron facility at the Karlsruhe Institute of Technology (KIT). Response of the detectors is linear over the whole dynamic range of the IR1 beamline. Combining the picosecond scaled response mechanism of the high-temperature superconductor YBa2Cu3O7-x (YBCO) to THz excitations with broad-band readout a temporal resolution of 15 ps full width at half maximum (FWHM) was reached. Real-time resolution of CSR single shots was observed at ANKA and UVSOR-III, the synchrotron facility of the Institute of Molecular Science in Okazaki, Japan.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-THPME125
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)
THPME126	General Consideration for Button-BPM Design	3537
SUSPSNE071	use link to see paper's listing under its alternate paper code
	A.R. Molaee, M.Sh. Shafiee ILSF, Tehran, Iran M. Mohammadzadeh Shahid Beheshti University, Evin, Tehran, Iran M. Samadfam Sharif University of Technology (SUT), Tehran, Iran
	In order to design Button Beam Position Monitors (BPMs) for synchrotron facilities, one algorithm by C# have been developed which can calculate all required parameters to analyze optimal design based on vacuum chamber and button dimensions. Beam position monitors are required to get beam stabilities on submicron levels. For this purpose, different parameters such as capacitance, sensitivity versus bandwidth, intrinsic resolution, induced charge and voltage on buttons are calculated. Less intrinsic resolution and high sensitivity and capacitance are desired. To calculate induced charge and voltage on each button, Poisson's equation has been solved by Green method. For sensitivities calibration, two-dimensional map of BPM response is obtained theoretically and compared with the CST simulation map. Results show a good agreement where as their difference is less than 5%.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-THPME126
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)
THPME128	Fast Beam Diagnostics for Third-Generation Synchrotrons by Means of Novel Diamond-based Photon BPMs	3541
	M. Antonelli, G. Cautero, I. Cudin, D.M. Eichert, D. Giuressi, W.H. Jark, E. Karantzoulis, S. Lizzit, R.H. Menk Elettra-Sincrotrone Trieste S.C.p.A., Basovizza, Italy A. De Sio, E. Pace Università degli Studi di Firenze, Firenze, Italy M. Di Fraia Università degli Studi di Trieste, Trieste, Italy
	In the past years electron beam stability has been intensively addressed In new-generation Synchrotron Radiation (SR) sources. Many SR machines have been equipped with a Fast Orbit Feedback (FOFB) based on electron Beam-Position Monitors (eBPMs). Also photon Beam-Position Monitors (pBPMs) are a useful tool for keeping the electron beam under control by simultaneously monitoring position and intensity of the delivered radiation; the machine control system can take advantage of this information in order to improving the electron beam stability. At Elettra, a diagnostic beamline, which utilizes a couple of single-crystal CVD diamond detectors as fast pBPMs, has been built and inserted into a bending-magnet front end. Preliminary tests carried out during normal machine operations show that this system allows to monitor the beam position with sub-micrometric precision at the demanding readout rates required by the FOFB. Therefore, this diagnostic line represents a demonstrator for future implementation of pBPMs at several bending-magnet front ends of Elettra.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-THPME128
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)
THPME129	Application of Libera Brilliance+ to Special Purpose BPMs in SuperKEKB	3544
	S. Kanaeda, H. Fukuma, H. Ishii, K. Mori, M. Tobiyama KEK, Ibaraki, Japan
	The KEKB accelerator at KEK is being upgraded to SuperKEKB, and will be starting operation in 2015. SuperKEKB will have 444 Beam Position Monitors (BPMs) in the positron ring (LER), and 466 in the electron ring (HER). Two BPMs in each ring will be newly introduced for measuring fast beam orbit oscillations, and another two BPMs in each ring will be introduced for the fast beam orbit interlock at SuperKEKB. The required resolution is below several μm for fast beam orbit oscillation monitoring, and the requirement for the response time is less than 100 μs for the fast beam orbit interlock. We plan to use the Libera Brilliance+ from Instrumentation Technologies as signal processors for these special purpose BPMs. This paper discusses the application of the Libera Brilliance+ to these special purpose BPMs.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-THPME129
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)
THPME130	Development of New Data-taking System for Beam Loss Monitors of J-PARC MR	3547
	K. Satou, N. Kamikubota, T. Toyama J-PARC, KEK & JAEA, Ibaraki-ken, Japan S.Y. Yoshida Kanto Information Service (KIS), Accelerator Group, Ibaraki, Japan
	A new data acquisition system has been developed to improve band-width and dynamic range of the beam loss monitor systems. It consists of isolation current amplifiers with the gain of 1M and the band-width of DC-100kHz, and VME-based 24bit ADCs with the band-width of DC-300kHz and the noise level of 100uV peak to peak. The waveform data of 1MS/s and 1KS/s, and the charge count which is the integrated waveform data are generated and these are compared with alarm levels for the machine protection system. Long-term ground-level stability is essential to monitor residual dose activities. Some beam loss signals include effect of radiations from activated devices, and thus its fractions should be excluded. If the residual dose activities just before the beam injections can be monitored, these fractions would be roughly estimated. Furthermore, on-line monitoring of the residual dose activities after a beam operation will be useful for activation control of the devices at the high level activation area like the collimator and the slow-extraction area. A shot by shot DC offset cancellation is adopted to ensure high ground level stability.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-THPME130
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)
THPME131	A Multi-conductor Transmission Line Model for the BPMs	3550
	T. Toyama J-PARC, KEK & JAEA, Ibaraki-ken, Japan
	We have developed an accurate and efficient analysis method with a multi-conductor transmission line model for beam position monitors (BPMs). This method combines the two-dimensional electrostatic analysis including beams in the transverse plane and the transmission line analysis in the longitudinal direction. The loads are also included in the boundary condition of the transmission line analysis. Calculation of 2D electrostatic fields can be easily performed with the boundary element method. The BPM response to a beam is compared with that to a stretched wire.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-THPME131
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)
THPME132	Generation and Diagnosis of Ultrashort Electron Bunches from a Photocathode RF Gun Linac	3553
SUSPSNE072	use link to see paper's listing under its alternate paper code
	I. Nozawa, M. Gohdo, K. Kan, T. Kondoh, K. Norizawa, A. Ogata, J. Yang, Y. Yoshida ISIR, Osaka, Japan H. Kobayashi KEK, Ibaraki, Japan
	Ultrashort electron bunches are essential for time-resolved measurement methods such as pulse radiolysis* from the viewpoint of time resolutions. On the other hand, generation of electro-magnetic wave in the THz range using short electron bunches has been investigated**. Frequency spectra of coherent transition radiation (CTR) emitted by an electron bunch depend on bunch form factor (BFF), which is expressed by Fourier coefficients of longitudinal distribution in the electron bunch. In this study, the bunch length measurement was demonstrated by analyzing THz-waves generated by CTR. Femtosecond electron bunches were generated by a laser photocathode RF gun linac and magnetic bunch compressor. THz-waves generated by CTR, which was emitted on an interface of an aluminum mirror along the beam trajectory, were transported to a Michelson interferometer. The bunch length was measured by analyzing interferogram, which was an infrared detector output as a function of a moving mirror position. Finally, the bunch length was measured according to fitting curves for the interferogram near the centerburst***. Minimum bunch length of 1.3 fs was obtained at a bunch charge of ~1 pC. *J. Yang et al., Nucl. Instrum. Meth. A 556, 52 (2006). **K. Kan et al., Appl. Phys. Lett. 99, 231503 (2011). ***A. Murokh et al., Nucl. Instrum. Meth. A 410 (1998).
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-THPME132
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)
THPME133	Bunch Length Measurement with 2-Cell RF-Deflector at Waseda University	3556
	T. Takahashi, Y. Nishimura, M. Nishiyama, K. Sakaue, M. Washio Waseda University, Tokyo, Japan T. Takatomi, J. Urakawa KEK, Ibaraki, Japan
	We have been studying on a system to measure the length of electron bunch generated by a photocathode rf electron gun at Waseda University. We adopted the rf-deflector system which can convert the longitudinal distribution to transverse by sweeping the electron bunch. By using HFSS, we optimized the design of the 2 cell rf-deflector which is operating on π-mode, dipole (TM110-like) mode at 2856 MHz. The fabrication and the tuning of the rf deflector have successfully processed. We have installed the rf-deflector in the accelerator system of Waseda University, and performed the measurement of the bunch length. It is confirmed that this rf-deflector has the temporal resolution of 167fs with 700kW supply when the beam energy is 4.8MeV. This means that our rf-deflector system has possibility to measure the ultra-short bunch length. In this conference, the rf-deflector system in Waseda University, the result of the bunch length measurement, the performance of the rf-deflector and the future plan will be reported. Work supported by JSPS Grant-in-Aid for Scientific Research (A) 10001690 and the Quantum Beam Technology Program of MEXT.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-THPME133
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)
THPME134	Experimental Results of a Gas Jet Based Beam Profile Monitor	3559
SUSPSNE078	use link to see paper's listing under its alternate paper code
	V. Tzoganis RIKEN Nishina Center, Wako, Japan A. Jeff, V. Tzoganis, C.P. Welsch The University of Liverpool, Liverpool, United Kingdom A. Jeff, V. Tzoganis, C.P. Welsch Cockcroft Institute, Warrington, Cheshire, United Kingdom A. Jeff CERN, Geneva, Switzerland
	Funding: Work supported by the EU under grant agreement 215080, HGF and GSI under contract number VH-NG-328, the STFC Cockcroft Institute Core Grant Mo.ST/G008248/1, and a RIKEN-Liverpool studentship. A novel, least invasive beam profile monitor based on a supersonic gas jet has been developed by the QUASAR Group at the Cockcroft Institute, UK. It allows the measurement of beam profiles for various particle beams across a range of energies and vacuum levels to be made. A finely collimated neutral gas jet, produced by a nozzle and several skimmers, is injected into a vacuum chamber perpendicular to the main particle beam. Ionization by the primary beam produces ions which are extracted from the interaction region and directed towards an imaging detector. This contribution presents the design of the monitor and first experimental results obtained with a low energy electron beam. It also discusses solutions of previous alignment problems and challenges in the realization of a versatile control and data acquisition system
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-THPME134
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)
THPME135	Simulations of the Ion Spatial Distribution in a Gas-Curtain Based Beam Profile Monitor	3563
	B.B.D. Lomberg, A. Jeff, V. Tzoganispresenter, C.P. Welsch Cockcroft Institute, Warrington, Cheshire, United Kingdom A. Jeff, B.B.D. Lomberg, V. Tzoganispresenter, C.P. Welsch The University of Liverpool, Liverpool, United Kingdom A. Jeff CERN, Geneva, Switzerland V. Tzoganispresenter RIKEN Nishina Center, Wako, Japan
	Funding: Work supported by the EU under grant agreement 215080 and 289485, HGF and GSI under contract VH-HG-328, the STFC Cockcroft Institute Core Grant No. ST/G008248/1, and a RIKEN-Liverpool studentship. A gas-jet monitor has been developed and commissioned by the QUASAR Group at the Cockcroft Institute, UK. It is designed to measure the transverse profile of a beam by crossing it with a neutral supersonic gas-jet. An array of high voltage electrodes is used to extract ions from the region where the beam and gas-jet interact. These ions first hit a micro-channel plate (MCP) and are then imaged through a phosphor screen and a CCD camera. It is important to understand and characterise the measured ion distribution in order to extract the beam profile. Therefore, numerical investigations using the commercial COMSOL and OPERA codes were carried out benchmarking profile measurements obtained from a low energy electron beam. This paper presents results from these studies. It compares measurements based on the interaction of the primary beam with the residual gas or the ultra-cold gas curtain, and discusses the comparisons of simulated profiles and extraction field configurations on the measured profile.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-THPME135
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)
THPME136	Beam Energy and Longitudinal Beam Profile Measurement System at RIBF	3566
	T. Watanabe, M. Fujimaki, N. Fukunishi, H. Imao, O. Kamigaito, M. Kase, M. Komiyama, N. Sakamoto, K. Suda, M. Wakasugi, K. Yamada RIKEN Nishina Center, Wako, Japan
	Monitors that use plastic scintillator (scintillation monitors) were fabricated to measure the energy and longitudinal profiles of heavy-ion beams at the RIKEN RI beam factory (RIBF).Six pairs of scintillation monitors (12 monitors) installed in the transport lines were used to measure the particle time-of-flight (TOF) to determine the acceleration energy of the heavy-ion beams. In addition, five scintillation monitors were installed to optimize the phase between the rebuncher cavities and the beam for the beam injection to the cyclotrons. Longitudinal beam profiles were obtained by using a time-to-digital converter (TDC), which digitizes the detected signals from the scintillator and the RF clock. The energy of the beam can be calculated from the measured TOF of the beam by using a scintillation monitor pair. Recently, to help users operate the system more easily, a new embedded processor with a higher-performance CPU was introduced, and LabVIEW programs were newly written or greatly improved. Development of the scintillation monitor system and results of experimental measurements of heavy-ion beams are reported.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-THPME136
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)
THPME137	Preliminary Study of Non-invasive Beam Profile Measurements for Proton Beams	3569
	H. He, J.S. Cao, Q.Y. Dengpresenter, J.H. Junhui, Y.F. Sui, J. Yue, Y. Zhao IHEP, People's Republic of China J. Chen NSRRC, Hsinchu, Taiwan
	Funding: This work was supported by NSFC under grant NO.11305186 and No.11205172 Two non-invasive beam profile measurement methods were developed for China high intensity proton beams projects, including CSNS and ADS. The first consists in an IPM (ionization beam profile monitor) system which detect the ionized products from a collision of the beam particle with residual gas atoms or molecules present in the vacuum pipe. The second is an electron beam scanner which using a low energy electron beam instead of a metal wire to sweep through the beam. The deflection of electron beam by the collective field of the high intensity beam is measured. The charge density in the high intensity beam can be restored under certain conditions or estimated by various mathematical techniques. Here we present the design parameters of the IPM system, the signal intensity of ionization products, optimization of the electric field, machine designs of electrode, tracking of the ionization products and so on. The principle of the electron beam scanner and the test results which is based on a commercial electron gun from Kimball Physics are also introduced in details.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-THPME137
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)
THPME138	Dynamic Comparison With XAL and Tracewin Based on the Injector-I of China ADS Test Stand	3572
	Y.L. Zhao, P. Cheng, H. Geng, C. Meng, S. Pei, B. Sun, H.J. Wangpresenter, B. Xu, F. Yan IHEP, Beijing, People's Republic of China
	The injector scheme I (injector-I) of China ADS test stand is a superconducting Linac which accelerates 10mA beam to 3.2MeV, 5MeV, 10MeV, and then transports it to the dump. The dump line is designed to meet the requirement of beam expansion at the three different energies. The XAL from SNS was selected for the commissioning of China ADS. Because the beam current is so high, the nonlinear space charge force cannot be omitted. As we know, XAL calculates the space charge force with linear resolver. So, whether it could display the beam exactly enough is an important issue to consider. As a preparation for beam commissioning, the virtual accelerator in XAL frame was built and tested. Here in this paper, the envelopes of the 5MeV and 10MeV lattices from general XAL mpx application are shown and compared with the multiparticle tracking code TraceWin.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-THPME138
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)
THPME139	Emittance Measurement with Wire Scanners at CADS MEBT1	3575
	H. Geng, P. Cheng, C. Meng, S. Pei, B. Sun, H.J. Wangpresenter, B. Xu, F. Yan, Y.L. Zhao IHEP, Beijing, People's Republic of China
	The C-ADS project has started beam commissioning. The ion source and LEBT has been commissioned successfully, while the RFQ is under conditioning. The Medium Energy Beam Transport line-1 (MEBT) is the place where extensive beam parameter measurement will be carried out. Beam emittance is one of the most critical parameters which have to characterized. In the C-ADS injector-I, the MEBT-1 has installed three wire scanners to measure the beam sizes. The transverse emittance measurement method using the wire scanners will be discussed in detail in this paper.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-THPME139
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)
THPME140	New Beam Diagnostics and Related Study on HLS Photo-Injector and HLS II	3578
	Q. Luo, H.T. Li, P. Lu, B.G. Sun, K. Tang, J.J. Zhengpresenter, Z.R. Zhou USTC/NSRL, Hefei, Anhui, People's Republic of China
	Funding: Work supported by Natural Science Foundation of China 11005105, 11005106, 11205156 and 11375178. A team in NSRL is now doing research about small model accelerators and carrying out series of related experiments on HLS photo-injector and HLS II storage ring. Cavity beam multi-parameter monitor system designed for the HLS photocathode RF electron gun consists of a beam position monitor, a beam quadrupole moment monitor and a beam density and bunch length monitor. TM0n0 modes of cavity can be used to work out beam density and bunch length simultaneously. Miniaturization of FEL facilities is now being studied based on results of experiments and theoretical work before. The team also participate in commissioning of HLS II, i.e. measured work points of the new storage ring and did some research on longitudinal bunch-by-bunch feedback system.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-THPME140
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)
THPME141	Design of Beam Intensity Measurement System in Injector for HLS II	3581
	C. Cheng, P. Lu, B.G. Sun, K. Tangpresenter, J. Xu, Y.L. Yang, Z.R. Zhou, J.Y. Zou USTC/NSRL, Hefei, Anhui, People's Republic of China
	A new beam intensity measurement (BIM) system has been developed and has been used in the upgrade project of HLS II. After the upgrading is accomplished, electron energy in Injector endpoint will increase from 200MeV to 800MeV to achieve the goal of top-off injector. Meanwhile, macro pulse width changes from 1us to 1ns and peak intensity from 50mA to 1A approximately. So three fast current transformers (FCTs) and two integrating current transformer (ICTs) are installed in Linac and Transport Line to measure single pass beam parameters. In this article, off-line calibration of beam transformer is elaborated. Since the fast pulse signals from beam transformer will be hugely distorted after they transmit from Injector vacuum chamber to the Injector beam diagnostic centre room after hundreds of meters long LMR-400 cable, signal recovery algorithm based on FFT/IFFT is used to re-appear the true original signal and calculate the calibration efficient. In the end, resolution and measurement result of the BIM system is presented.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-THPME141
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)
THPME142	Design of the Beam Profile Monitors for THz Source Based FEL	3584
	J. Liu, P. Lu, B.G. Sun, K. Tangpresenter, J.G. Wang, J. Xu, Y.L. Yang, Z.R. Zhou USTC/NSRL, Hefei, Anhui, People's Republic of China
	Design of the Beam Profile Monitors for THz Source Based FEL* J. Liu, P. Lu, B. G. Sun#, Y. J. Pei, Y. L. Yang, Z.R. Zhou, J. G. Wang, K. Tang, J. Xu NSRL, School of Nuclear Science and Technology, University of Science and Technology of China, Hefei 230029, P. R. China Abstract To meet requirements of high performance THz-FEL, a compact FEL facility was proposed. In order to characterize the beam, some beam profile monitors were designed. There are four flags for beam profiles in Linac，one pop-in monitor for high precision beam profile inside a small-gap undulator, and two screens to measure the beam energy spread and emittance of Linac. On one hand, we need to use software to control the position of these profile monitors, on the other hand, we need screens to display the results. This paper describes how to design and control these monitors, as well as how to measure the beam parameter.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-THPME142
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)
THPME143	Measuring Energy Spread Using Beam Screen Monitor and Four Strip-Line Electrodes for Hls II Injector*	3587
SUSPSNE076	use link to see paper's listing under its alternate paper code
	K. Tang, J. Liu, P. Lu, Q. Luo, B.G. Sun, H. Xu, J. Xu, Y.L. Yang, Z.R. Zhou, J.Y. Zou USTC/NSRL, Hefei, Anhui, People's Republic of China
	In order to nondestructively measure the beam energy spread with a beam energy of 0.8GeV in the injector at the upgrade project of Hefei Light Source (HLS II) in real time, a beam energy spread monitor (BESM) using beam position monitor (BPM) with four stripline electrodes has been developed. And a screen monitor (SM) near the BESM is used to measure beam energy spread destructively. This paper introduces in brief the beam position measurement system and beam transverse profile measurement system. The relationship between the transverse size at the BESM and at the SM (Flag3) is discussed in detail in this report. The result shows that energy spread measuring result of BESM and SM is 0.19% and 0.18% respectively. So we can draw a conclusion that the BESM is capable of nondestructively measuring the beam energy spread.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-THPME143
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)
THPME144	Stripline Beam Position Monitor for THz Source Based FEL	3590
	J. Xu, L. Li, J. Liu, P. Lu, Y.J. Pei, B.G. Sun, K. Tangpresenter, J.G. Wang, F.F. Wu, H. Xu, Y.L. Yang, Z.R. Zhou, J.Y. Zou USTC/NSRL, Hefei, Anhui, People's Republic of China
	A 14MeV Linac with both the micro-pulse repetition rate 2856MHz and the macro-pulse width 6us for the THz Source Based FEL was proposed. In order to measure the beam position, a stripline beam position monitor (BPM) was designed, and a commercial BPM electronics Libera Brilliance Single Pass was adopted. As the input carrier frequency of the BPM electrode signal is 2856MHz, but the operating frequency of the Libera Brilliance Single Pass is 500MHz, so a front-end electronics was needed before the electrode signals feed into Libera Brilliance Single Pass. The front-end electronics was designed to make the BPM electrode signals of 2856MHz convert to 500MHz.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-THPME144
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)
THPME145	BPM Signal Channel Characterization Test based on TDR for HLS II Storage Ring	3593
	J.J. Zheng, C. Cheng, P. Lu, Q. Luo, B.G. Sun, Y.L. Yang, Z.R. Zhou USTC/NSRL, Hefei, Anhui, People's Republic of China
	A new BPM system on the upgraded Hefei light source (HLSII) storage ring is installed. Before the machine commissioning, the BPM system should be carefully tested, such as the conductivity and integrity of BPM signal channels from button electrodes to digital beam position processors (pickups, cables and connectors). This paper presents an experience of signal channel test based on time domain reflection (TDR) for HLS II storage ring BPM system. Basing on the wave propagation method, an analytic expression for the signal from TDR on BPM signal channel is briefly introduced. The conductivity and integrity of the BPM signal channels can be verified by comparing the TDR waveform to theory signal. All the BPM signal channels are tested by the TDR in order to verify electronic characteristic and the usability. And some breakdowns are analysed and handled.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-THPME145
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)
THPME146	Bunch Length Measurement by Using a 2-Cell Superconducting RF Cavity in cERL Injector at KEK	3596
	J.G. Hwang, E.-S. Kim Kyungpook National University, Daegu, Republic of Korea T. Miyajima KEK, Ibaraki, Japan
	The development of future light source and linear colliders require high quality electron beams with short bunch length. The measurement of the bunch length is important technique for future electron machine. In general, the bunch length was measured by using deflecting cavity which has the time dependent transverse electromagnetic field. However, the transverse electric field of 2-cell superconducting RF (SRF) cavity can also provide the correlation between the bunch length and beam size as like the role of the deflecting cavity in bunch length measurement. The deflection strength was calibrated by changing the RF phase and the beam offset because the strength of transverse electric field of RF cavity depends on the phase of RF field and the beam offset in the cavity. We will present new way to measure the bunch length by using 2-cell SRF cavity, which has the acceleration field of 15 MV/m, and the measured result with the bunch length of 3 ps in cERL injector.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-THPME146
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)
THPME147	The High Position Resolution Cavity BPM Developments and Measurement for ILC Final Focus System	3599
	S.W. Jang, J.G. Hwangpresenter, E.-S. Kim, L. Lee KNU, Deagu, Republic of Korea P. Bambade, O.R. Blanco-García, F. Bogard, S. Wallon LAL, Orsay, France Y. Honda, T. Okugi, T. Tauchi, N. Terunuma KEK, Ibaraki, Japan
	An ultra high position resolution cavity BPM was developed for the final focus system of ATF2, which is a accelerator test facility for ILC final focus system. The main purpose of ATF2 are achievement of 37 nm beam size and nano-meter beam orbit stability at IP(Interaction Point). For these purposes, a few nano meter beam position resolution was required for this cavity BPM, which is called the IP-BPM. The IP-BPM was fabricated 2 blocks of IP-BPM, the first block consists of two cavities in one block and second block consists of single cavity. IP-BPM can measure beam position in vertical and horizontal independently by using rectangular shape single cavity. Three IP-BPMs were installed at ATF IP region inside IP-chamber, and its position resolution was measured. We will present the detailed results on the beam tests.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-THPME147
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)
THPME148	Beam Dynamics Issues for a Superconducting Linear Accelerator-based High Power Heavy Ion Machine	3602
SUSPSNE038	use link to see paper's listing under its alternate paper code
	J.G. Hwang, E.-S. Kim Kyungpook National University, Daegu, Republic of Korea H. Jang, D. Jeon, H.J. Kim, H.J. Kim IBS, Daejeon, Republic of Korea
	The driver linac of RAON heavy ion accelerator based on the superconducting technology, which consists of a 28 GHz ECR ion source, a low energy beam transport line, a RFQ accelerator, a medium energy beam transport line, a low energy linac(SCL1), a charge stripping section and a high energy linac(SCL2), will produce the stable ion beam from proton with 600 MeV to uranium with 200 MeV/u. Many beam dynamics issues such as beam steering effect due to QWR cavities with the peak electric field of 35 MV/m, emittance growth in charge stripper due to the straggling effect, parametric resonance and envelope instability were verified to design the high power heavy ion machine which can produce the high quality beam. In this presentation, we explain our study results for achieving longitudinal acceptance larger than 27 keV/u-ns for the stable operation and minimizing the emittance growth less than 30 % in the superconducting linac for high quality beam at the in-flight target.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-THPME148
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)
THPME149	Beam Dynamics Issues in the Post Accelerator for the Rare Isotope Ion Beams from ISOL System in RISP	3605
	J.G. Hwang, S.W. Jang, E.-S. Kim Kyungpook National University, Daegu, Republic of Korea B.H. Choi, D. Jeon, H.J. Kim, H.J. Kim, I. Shin IBS, Daejeon, Republic of Korea L. Lee KNU, Deagu, Republic of Korea
	The accelerator for RISP, which is the superconducting technology based heavy ion linear accelerator construction project, is composed mainly of the driver linac for stable ion beam from an ECR ion source and post linac for unstable ion from an ISOL system. The post accelerator can accelerate the unstable ion beams up to 16.5 MeV/u for 132Sn and 16.0 MeV/u for 58Ni, which has the ratio of mass to charge, A/q, of 8.3. The unstable ion beam such as 132Sn from an ISOL system has the large transverse and longitudinal emittances. Hence acceptance and envelope of the post accelerator should optimize for stable operation. The beam was transported by the post-to-driver transport (P2DT) line which consists of a charge stripper, two charge selection sections and a telescope section with the bunching cavities. In this presentation, we will show the criteria for the design of the post accelerator and result of beam tracking simulation from the low energy transport line to the end of post linac. The initial coordinates of the particles were acquired by the tracking simulation from the low energy beam transport (LEBT) line to the medium energy beam transport (MEBT) line.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-THPME149
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)
THPME150	Spectrometer for SRF Gun	3608
	I.Yu. Vladimirov, V.I. Shvedunov MSU, Moscow, Russia T. Kamps, J. Völker HZB, Berlin, Germany
	We report about the design of a spectrometer for energy spectrum measurements of an electron beam generated by a superconducting radio-frequency photoelectron gun (SRF gun), which is under construction at HZB for BERLinPro. The spectrometer shall provide absolute accuracy of energy measurements of about 0.1% and energy resolution about 0.1%. The spectrometer will be also used for single shot phase space measurements in combination with a transverse deflecting cavity.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-THPME150
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)
THPME151	New Station for Optical Observation of Electron Beam Parameters at Electron Storage Ring SIBERIA-2	3611
	Stirin, A.I. Stirin, V. Korchuganov, G.A. Kovachev, D.G. Odintsov, Yu.F. Tarasov, A.V. Zabelin NRC, Moscow, Russia V.L. Dorohov, A.D. Khilchenko, A.L. Scheglov, L.M. Schegolev, A.N. Zhuravlev, E.I. Zinin BINP SB RAS, Novosibirsk, Russia
	The paper is dedicated to a new station for optical observation of electron beam parameters which was built at the synchrotron radiation (SR) storage ring SIBERIA-2 at Kurchatov Institute. The station serves for the automatic measurement of electron bunches transverse and longitudinal sizes with the use of SR visible spectrum in one-bunch and multi-bunch modes; the study of individual electron bunches behaviour in time with changing different accelerator parameters, the precise measurement of betatron and synchrotron oscillations frequency. The station with its diagnostic systems on the optical table is located outside the shielding wall of the storage ring. The paper contains an outline scheme of SR beam line and a block-scheme of optical measurement part, describes the principle of operation and technical characteristics of main system elements (dissector tube, 16-element avalanche photodiode array, CCD-matrix, etc.) as well as results of electron beam optical diagnostics and an estimation of accuracy of the bunches parameters measurements.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-THPME151
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)
THPME152	Application of the Optical Diagnostics during the Commissioning of the Booster of NSLS-II	3614
	O.I. Meshkov, S.M. Gurov BINP SB RAS, Novosibirsk, Russia V.V. Smaluk DLS, Oxfordshire, United Kingdom X. Yang BNL, Upton, Long Island, New York, USA
	We describe the experience obtained with several types of diagnostics during commissioning of the booster of NSLS-II. The set includes fluorescent screens, synchrotron light monitors and beam loss monitors. The information that was useful for commissioning as well as advantages and disadvantages of each diagnostics are discussed.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-THPME152
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)
THPME153	The New Optical Device for Turn-to-turn Beam Profile Measurement	3617
	O.I. Meshkov, V.L. Dorohov, A.A. Ivanova, A.D. Khilchenko, A.I. Kotelnikov, A.N. Kvashnin, P.V. Zubarev BINP SB RAS, Novosibirsk, Russia S.V. Ivanenko, E.A. Puryga Budker Institute of Nuclear Physics, Novosibirsk, Russia V. Korchuganov RRC, Moscow, Russia Stirin, A.I. Stirin NRC, Moscow, Russia
	The linear avalanche photodiodes array is applied for turn-to-turn beam profile measurement at Siberia-2 synchrotron light source. The apparatus is able to record a transversal profile of selected bunch and analyze the dynamics of beam during 220 turns. The first experience with application of new diagnostics for routine use at the installation is described.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-THPME153
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)
THPME154	Turn-by-turn Beam Profile Study at VEPP-4M	3620
	O.I. Meshkov, E.B. Levichev, P.A. Piminov, A.N. Zhuravlev BINP SB RAS, Novosibirsk, Russia
	The beam dynamics during crossing of dynamical aperture border was studied. We controlled the beam losses and beam transversal profile during high-amplitude betatron oscillations caused by the electrostatic kick. The beam transversal profile was recorded by the Multi Anode Photomultiplier with turn-to turn temporal resolution. The experimental data are compared with numerical simulation.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-THPME154
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)
THPME155	Beam Phase Space Reconstruction for Monitoring the Luminosity in the VEPP-2000 Collider	3623
	A.L. Romanov, I. Koop, E. Perevedentsev, D.B. Shwartz BINP SB RAS, Novosibirsk, Russia
	16 synchrotron light imaging monitors available in VEPP-2000 can be used for evaluation of dynamic betas and emittances at collision. Tomographic techniques are useful for reconstruction of non-gaussian beam phase space at the IPs at high intensities of colliding bunches. The output is applied for prompt luminosity monitoring.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-THPME155
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)
THPME156	Convergent Cherenkov Radiation from Dielectric Targets	3626
	S.N. Galyamin, E.S. Belonogaya, A.V. Tyukhtin, V.V. Vorobevpresenter Saint-Petersburg State University, Saint-Petersburg, Russia E.S. Belonogaya LETI, Saint-Petersburg, Russia
	Funding: Work was supported by the Grant of the President of Russian Federation (No. 273.2013.2). Cherenkov radiation is a convenient tool for charged particle detection and bunch diagnostics. However, due to the complexity of real radiator geometry, different approximate techniques are elaborated for investigation of excited radiation*. Here we develop recently reported** approximate method for calculating Cherenkov radiation of a charge flying near a dielectric target having two main boundaries (the first interacts with a charge field and the second mainly refracts a generated radiation). We focus on cases where the radiation outside the target is convergent and use two methods for field investigation: ray optical technique and aperture integration technique. First, we deal with the case of a conical target with a vacuum channel. Under certain conditions, this radiation is concentrated near the line being the symmetry axis of the target. Second, we find the specific shape of the target that concentrates radiation in a small vicinity of given point (focus). Such targets can be used for improvement of detectors and bunch diagnostics systems based on Cherenkov effect. *A.P. Potylitsyn et al., Diffraction Radiation from Relativistic Particles, STMP 239 (Springer, 2010). **E.S. Belonogaya, A.V. Tyukhtin, S.N. Galyamin, Phys. Rev. E, 87, 043201 (2013).
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-THPME156
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)
THPME157	Radiation of a Charged Particle Bunch Moving in the Presence of Planar Wire Structure	3629
SUSPSNE081	use link to see paper's listing under its alternate paper code
	V.V. Vorobev, S.N. Galyamin, A.V. Tyukhtin Saint-Petersburg State University, Saint-Petersburg, Russia
	Funding: Work was supported by "Dynasty" Foundation, the Grant of the President of Russian Federation (No. 273.2013.2) and the Russian Foundation for Basic Research (Grant No. 12-02-31258). The structure under consideration represents a set of long thin parallel wires which are placed in a plane with fixed spacing. The wires can exhibit a limited conductivity. If the period of the structure is much less than the typical wavelength, the structure’s influence can be described with help of the averaged boundary conditions*. The main attention is given to the case when the bunch flies through the grid in the orthogonal direction. Radiation of charged particle bunch which have small transversal size and limited longitudinal one is studied. Analytical expressions for volume and surface waves are given for the bunches with arbitrary longitudinal profile. A separate analysis is performed for the particular case of the plane which is ideally conducting in only one direction. It is shown that the surface wave is similar, in some way, to the radiation field of the bunch moving in a wire metamaterial**. It is demonstrated that the detection of surface waves can be used to estimate the longitudinal sizes of bunches. Typical numerical results for bunches of different shapes and structures with different parameters are given. * M.I. Kontorovich et al, Electrodynamics of Grid Structures (Moscow, 1987). ** V.V. Vorobev, A.V. Tyukhtin, Phys. Rev. Let., 108, 184801 (2012).
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-THPME157
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)
THPME158	Coherent Diffraction and Cherenkov Radiation from Short Electron Bunches in Fibers	3632
	G.A. Naumenko, V.V. Bleko, A. Potylitsynpresenter, V.V. Soboleva TPU, Tomsk, Russia
	Funding: This work is particularly supported by grant of Russian MES Program "Nauka" number 2456 The ability to use a radiation of relativistic electrons in optical fibers for beam diagnostics was proposed by X. Artu recently *. In the cited work the properties of different types of radiation, such as diffraction and Cherenkov radiation in the visible region, induced in fibers by relativistic electron were considered. In our report we present the results of experimental investigation of such a phenomenon for millimeter wavelength radiation. The origin and properties of radiation in fibers were investigated for different geometries of fiber position in respect to the electron beam. The spectral characteristics and dependence on the orientation angle of fibers relative to the electron beam were investigated. One of the useful properties of fibers is the fiber flexibility. The characteristics of radiation accepted by flexible fiber with diameter D=11 mm and length L=600 mm were investigated as a function of curvature radius of the fiber R. The experimental results show the allowable transport factor of radiation for the condition L>R>>D. We believe that fibers for mm and submm range can be used for beam diagnostics also. * X Artru and C. Ray, Nucl. Inst. Meth. B 309 (2013)
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-THPME158
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)
THPME159	Double Diffraction Radiation Target Interferometry for Micro-train Beam Diagnostics	3635
SUSPSNE073	use link to see paper's listing under its alternate paper code
	D.A. Shkitov, A. Potylitsynpresenter TPU, Tomsk, Russia A.S. Aryshev, J. Urakawa KEK, Ibaraki, Japan
	Funding: This work was supported by grant of Russian Ministry of Education and Science program “Nauka” number 2.1799.2011. Recently our group starts to investigate a feasibility of double diffraction radiation (DR) target interferometry for non-invasive micro-train beam diagnostics at KEK: LUCX facility. Double DR target consists of two metal plates and one of them can be moved relative to another along the beam trajectory. Micro-train beam is a sequence of short electron bunches with sub-ps spacing. As it was shown* double DR target can be used for such a beam diagnostics measuring DR yield versus plates displacement. The obtained tuning curve (interferogram) allows to determine a number of bunches within the micro-train and spacing between them. In order to design a reliable device for this aim we have to take into account different double DR target interferometer plate’s adjustment inaccuracies. These inaccuracies can be as follows: inaccuracies in the mutual adjustment of plates tilt angles to the beam trajectory, outer plate edge shift along the beam trajectory and other. The influence of the bunch form-factor shape is also considered. We investigated double DR target preparation accuracy requirements in order to minimize measurements uncertainties and increase interferometer resolution. * Skitov D.A. et. al., J. Phys.: Conf. Ser. 517, 012024 (2014).
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-THPME159
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)
THPME160	Design, Implementation and Preliminary Test Results of the ESS Beam Current Monitor System	3638
	H. Hassanzadegan, A. Jansson, C.A. Thomas ESS, Lund, Sweden J.L. Crisp FRIB, East Lansing, Michigan, USA U. Legatpresenter, K. Strniša Cosylab, Ljubljana, Slovenia M. Werner DESY, Hamburg, Germany
	The Beam Current Monitor system of the ESS linac will be mainly based on AC Current Transformers. The BCM system will be used to monitor the beam current and charge in absolute and differential modes. The differential current measurement is also intended for detecting large and sudden beam losses and acting on the Machine Interlock System (MIS), especially in areas where Beam Loss Monitors cannot be reliably used. A demo BCM based on a Bergoz ACCT and MTCA.4 electronics has been procured and integrated into EPICS. A VHDL code has been developed and successfully tested for the required FPGA signal processing including droop compensation, filtering, DC level correction and interfacing to the MIS. This paper gives an overview of the current status of the BCM system design and implementation as well as some preliminary test results in absolute and differential modes.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-THPME160
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)
THPME161	Integration of Beam Diagnostics Devices for a Therapy Accelerator	3641
	S. Tuma, J. Dedič, M. Klun, L. Šepetavc Cosylab, Ljubljana, Slovenia A. Kerschbaum, F. Osmić, M. Repovž, J. Sanchez Arias EBG MedAustron, Wr. Neustadt, Austria
	MedAustron is a synchrotron based accelerator complex, used for cancer treatment as well as for non-clinical research, and is situated in Wiener Neustadt, Austria. Cosylab has been working closely with MedAustron to develop the core accelerator control system and is now also working on on-site integration of beam diagnostics (BD) devices. These devices are critical for commissioning of the accelerator as well as later during regular operation to ensure high up-time of the machine. Beam instrumentation devices are fully integrated into the Front End Controller Operating System (FECOS) of the accelerator. FECOS is a custom designed control system framework implemented in LabVIEW, which provides unified interfaces and core services to all software components in the system. The Master Timing System component provides configurable real-time events distribution (triggers), essential for measurement and control in sections where the beam is bunched and device actions need to be synchronized. Both companies, MedAustron and Cosylab also developed user interfaces that are designed to be intuitive, while maintaining a level of flexibility for physics research.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-THPME161
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)
THPME162	Filling Pattern Measurements at ALBA using Time Correlated Single Photon Counting	3644
	L. Torino, U. Iriso CELLS-ALBA Synchrotron, Cerdanyola del Vallès, Spain
	At the ALBA synchrotron light source, the filling pattern is measured using a Fast Current Transformer (FCT). Applying a data analysis the filling pattern is measured with a dynamic range in the order of 102, limited by the electronic noise in the device. A new experimental set-up for filling pattern measurements was implemented using the Time Correlated Single Photon Counting. The technique consists in the measurements of the temporal distribution of the produced synchrotron radiation using Electro-Optical devices, from where the filling pattern is inferred. Two different photomultipliers are used to perform the measurement and results are compared. A further comparison between results from the photomultipliers and the FCT is performed to verify the accuracy of the results.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-THPME162
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)
THPME163	Beam Size and Emittance Reconstruction in the RMTL of Future Linear Colliders	3647
	A. Faus-Golfe, J. Resta-López IFIC, Valencia, Spain
	Funding: Work supported by FPA2010-21456-C02-01 Precise and fast beam size measurement and emittance reconstruction in the different subsystems and transfer lines of the Future Linear Colliders (ILC and CLIC) will be essential for beam tuning in order to achieve the required luminosity. In this paper we investigate the feasibility of using a multi-Optical Transition Radiation (m-OTR) system for fast transverse beam size measurement, emittance reconstruction and coupling correction in the Ring to Main Linac (RTML) of the FLCs. Diagnostic sections of the RTML have been matched to the optimum optical conditions for emittance reconstruction. The necessary requirements for the OTR monitors to be placed in the RTML are discussed.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-THPME163
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)
THPME165	Studies into Beam Loss Patterns at European Spallation Source	3650
	M. Jarosz, A. Jansson, L. Tchelidze ESS, Lund, Sweden
	Funding: This project is funded by the European Union under contract PITN-GA-2011-289485. The linear accelerator of European Spallation Source will produce 5 MW proton beam. Beam of this power will likely generate significant losses along the beamline. To study these losses, a coherent model of the whole machine is being made using custom generator. This model is used to perform Monte Carlo simulations of the propagation of the accelerated beam and the losses in the MARS code system. Preliminary simulations utilizing the uniform beam loss distribution were done. More detailed simulations based on the various different loss patterns focused around hot spots in magnets were also performed and their results compared. This confirmed the limit of 0.5 W/m average heat load on accelerating cavities foreseen by the cooling requirements. Additional studies investigated the dose absorbed by fragile cooling system’s elements during the normal operation of the facility defining their radiation resistance to the levels of few kGy/y. Further simulations will also give the information about the expected beam loss detectors signal at possible locations. These data will be further analysed using custom algorithms.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-THPME165
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)
THPME166	System Overview and Current Status of the ESS Beam Position Monitors	3653
	H. Hassanzadegan, A. Jansson, C.A. Thomaspresenter ESS, Lund, Sweden D. Lipka, M. Werner DESY, Hamburg, Germany A. Young SLAC, Menlo Park, California, USA
	It is planned to install more than 140 button BPMs along the ESS linac. The BPMs will be used to measure the beam position and phase in all foreseen beam modes and to provide input to the Machine Interlock System. The phase measurement is mainly intended for cavity tuning and Time-Of-Flight energy measurements. A customized BPM detector based on the European XFEL button style has been designed for the cold linac through a collaboration with DESY. Large buttons with diameters up to 40 mm are foreseen to provide enough S/N ratio not only with the nominal beam, but also with a low-current or a de-bunched beam. A demo MTCA.4 system has been procured and successfully integrated into EPICS. Also, a customized Rear Transition Module for down-mixing the BPM signals will be developed with SLAC. Electronics tests with a BPM test bench are currently going on at ESS. BPM installation in the linac is foreseen for 2017 and afterwards.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-THPME166
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)
THPME167	Development of Non-invasive Transverse Profile Monitors for the ESS Linac	3656
	C. Roose, C. Böhme, I. Dolenc Kittelmann, A. Jansson, C.A. Thomaspresenter ESS, Lund, Sweden A. Källberg Stockholm University, Stockholm, Sweden
	The European Spallation Source (ESS) consists of a partly superconducting linac which will deliver a 2 GeV proton beam to a rotating tungsten target. In this way, the ESS will be the world's most powerful neutron source. To measure the proton beams transverse profile at high intensity, the ESS develops two types of non-invasive profile devices. The first monitor is based on luminescence of the residual gas, the second one on ionization of the same gas. The latest developments of these profile monitors will be presented.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-THPME167
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)
THPME168	Proton Beam Imaging Options for the ESS Target	3659
	C.A. Thomas, T.J. Grandsaert, M. Göhran, R. Linander, T.J. Shea ESS, Lund, Sweden
	Conceptual design of an imaging system for the ESS proton beam current density on target is presented. The window separating the linac HV from the 1bar He-filled target station will be used as a source for imaging by means of either OTR or luminescence. The system presents many challenges to be addressed. The window and the primary optics will be exposed to extremely high radiation doses, providing heat cycles and mechanical stresses near the engineering limits, but also may change the surface properties of the window and the optics. The window lifetime expected to be less than 1 year will have to be replace bi-annually, imposing remote handling design for the window but also for part of the optics. In addition, the imaging system should be able to form an image from low to high current beam operations, in order to retrieve beam profile distribution and power density distribution of both static and raster beam, imposing a large numerical aperture (NA), but also to transport the image at more than 15m distance where radiation level is compatible with camera and pc stable operation and human access during commissioning and neutron production.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-THPME168
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)
THPME169	Status of the New Beam Size Monitor at SLS	3662
	J. Breunlin, Å. Andersson MAX-lab, Lund, Sweden N. Milas LNLS, Campinas, Brazil M. Rohrer, Á. Saá Hernández, V. Schlott, A. Streun PSI, Villigen PSI, Switzerland
	The Swiss Light Source (SLS) campaign on vertical emittance minimization and measurement required a beam size monitor with the ability to verify a sub-pmrad vertical emittance. This corresponds to a beam height of less than 4 μm. Within the TIARA Work Package ‘SLS Vertical Emittance Tuning’ a new beam size monitor was designed and built. The monitor is based on the imaging of the pi-polarized synchrotron radiation (SR) in the visible and UV spectral ranges. Besides imaging the monitor provides interferometric methods using vertically or horizontally polarized SR. With these complementary methods the consistency of beam size measurements is verified. An intermediate configuration of the monitor beamline using a lens as the focusing element has been commissioned in 2013. With this setup a vertical beam size of 4.8±0.5 μm, corresponding to a vertical emittance of 1.7±0.4 pmrad has been measured. During 2014 the monitor was commissioned in its final configuration with a toroidal mirror. The use of reflective optics allows wider bandwidth imaging and thus higher intensity. We report on challenges during commissioning and present first images of SR taken with the toroidal mirror.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-THPME169
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)
THPME170	Prospects for Longitudinal Phase-space Measurements at the MAX IV Linac	3665
	F. Curbis, O. Karlberg, S. Thorin, S. Werin MAX-lab, Lund, Sweden
	Knowing the longitudinal phase space of an electron beam is one of the most important and crucial issues in short-pulses linacs. To achieve this task expensive and rather complicated setups (like transverse deflecting cavities) are usually implemented. The MAX IV 3 GeV linac will be used to inject into two rings and to drive a short pulse facility. Nevertheless, a more deep understanding of the beam quality would be useful especially in view of an upgrade as FEL driver. Another interesting aspect is to evaluate how the double-achromat bunch compressors are performing. We are studying how to implement off-phase acceleration: last part of the linac will be set at zero-crossing phase and the transfer line to the 3 GeV ring could be used as energy spectrometer to retrieve the bunch profile. In the present configuration of the MAX IV linac this procedure will allow to check the bunch length after the first bunch compressor. Since it is work in progress, in this contribution we present a sketch of the measurement and the feasibility of the method will be explored by means of simulations.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-THPME170
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)
THPME171	General-purpose Spectrometer for Vacuum Breakdown Diagnostics for the 12 GHz Test Stand at CERN	3668
	M. Jacewicz, Ch. Borgmann, J. Ögren, R.J.M.Y. Ruber, V.G. Ziemann Uppsala University, Uppsala, Sweden
	Funding: This work is supported by the grants from the the Swedish Research Council DNR-2011-6305 and DNR-2009-6234. We discuss a spectrometer to analyze the electrons and ions ejected from a high-gradient CLIC accelerating structure that is installed in the klystron-driven 12 GHz test-stand at CERN. The charged particles escaping the structure provide useful information about the physics of the vacuum breakdown within a single RF pulse. The spectrometer consists of a dipole magnet, a pepper-pot collimator, a fluorescent screen and a fast camera. This enables us to detect both transverse parameters such as the emittance and longitudinal parameters such as the energy distribution of the ejected beams. We can correlate these measurements with e.g. the location of the breakdown inside the structure, by using information from the measured RF powers, giving in that way a complete picture of the vacuum breakdown phenomenon. The spectrometer was installed during Spring 2014 and will be commissioned during Summer 2014.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-THPME171
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)
THPME172	Experimental Results from the Characterization of Diamond Particle Detectors with a High Intensity Electron Beam	3671
	F. Burkart, R. Schmidtpresenter, O. Stein, D. Wollmann CERN, Geneva, Switzerland E. Griesmayer CIVIDEC Instrumentation, Wien, Austria
	Understanding the sources of ultra-fast failures, with durations of less than 3 LHC turns, is important for a safe operation of the LHC, as only passive protection is possible in these time scales. Diamond particle detectors with bunch-by-bunch resolution and high dynamic range have been successfully used to improve the understanding of some new ultra-fast loss mechanisms discovered in the LHC. To fully exploit their potential, diamond detectors were characterized with a high-intensity electron beam (105 to 1010 electrons per shot). For the first time their efficiency and linearity has been measured in such a wide range of intensities. In this paper the experimental setup will be described and the signals of the different detectors will be discussed. Finally, future applications of these detectors in high-radiation applications will be discussed.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-THPME172
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)
THPME173	Beam-based Measurements of the CPS Wire Scanner Precision and Accuracy	3674
	G. Sterbini, B. Dehningpresenter, S.S. Gilardoni, A. Guerrero CERN, Geneva, Switzerland
	During 2013 run a systematic campaign of beam-based measurement on the CERN Proton Synchrotron wire scanners has been performed. In this work we report the conditions of the measurements, we describe the results and their interpretation. The observations are compatible with an emittance relative precision and accuracy respectively better than 2 % and 5 % in the vertical plane for nTOF beams. The present limitations of the system are discussed and possible solutions are presented.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-THPME173
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)
THPME174	High-accuracy Diagnostic Tool for Electron Cloud Observation in the LHC based on Synchronous Phase Measurements	3677
SUSPSNE068	use link to see paper's listing under its alternate paper code
	J.F. Esteban Müller, P. Baudrenghien, T. Mastoridis, E.N. Shaposhnikova, D. Valuch CERN, Geneva, Switzerland
	Electron cloud effects such as heat load in the cryogenic system, pressure rise and beam instabilities are among the main limitations for the LHC operation with 25 ns spaced bunches. A new observation tool was developed to monitor the e-cloud activity and has been successfully used in the LHC during Run 1 (2010-2012). The power loss of each bunch due to the e-cloud can be estimated using very precise bunch-by-bunch measurement of the synchronous phase shift. In order to achieve the required accuracy, corrections for reflection in the cables and some systematic errors need to be applied followed by a post-processing of the measurements. Results show clearly the e-cloud build-up along the bunch trains and its evolution during each LHC fill as well as from fill to fill. Measurements during the 2012 LHC scrubbing run reveal a progressive reduction in the e-cloud activity and therefore a decrease in the secondary electron yield (SEY). The total beam power loss can be computed as a sum of the contributions from all bunches and compared with the heat load deposited in the cryogenic system. The plan to use this method in the LHC operation is also presented.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-THPME174
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)
THPME175	A Beam Gas Vertex Detector for Beam Size Measurement in the LHC	3680
	P. Hopchev, V. Baglin, C. Barschel, E. Bravin, G. Bregliozzi, N. Chritin, B. Dehning, M. Ferro-Luzzi, C. Gaspar, M. Giovannozzi, R. Jacobsson, L.K. Jensen, O.R. Jones, N.J. Jurado, V. Kain, M. Kuhn, B. Luthi, P. Magagnin, R. Matev, N. Neufeld, J. Panman, M.N. Rihl, V. Salustino Guimaraes, B. Salvant, R. Veness, E. van Herwijnen CERN, Geneva, Switzerland A. Bay, F. Blanc, S. Gianì, G.J. Haefeli, T. Nakada, B. Rakotomiaramanana, O. Schneider, M. Tobin, Q.D. Veyrat, Z. Xu EPFL, Lausanne, Switzerland R. Greim, W. Karpinski, T. Kirn, S. Schael, G. Schwering, M. Wlochal, A. von Dratzig RWTH, Aachen, Germany R. Matev Sofia University St. Kliment Ohridski, Faculty of Physics, Sofia, Bulgaria
	The Beam Gas Vertex (BGV) detector is foreseen as a possible non-invasive beam size measurement instrument for the LHC and its luminosity upgrade. This technique is based on the reconstruction of beam gas interaction vertices, where the charged particles produced in inelastic beam gas interactions are measured with high-precision tracking detectors. The design studies and expected performance of the currently developed BGV prototype will be presented with an overview given of the associated vacuum, detector, and readout systems. A brief description will be given of the BGV Monte Carlo simulation application, which is based on the LHCb computing framework (Gaudi) and allows simulation studies to be performed and online event reconstruction algorithms to be developed.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-THPME175
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)
THPME176	CERN Antiproton Decelerator Beam Instrumentation for the ELENA Era	3684
	M. Ludwig, L. Bojtár, M.F. Fernandes, M. Gąsior, L. Søby, G. Tranquille CERN, Geneva, Switzerland
	CERN is currently constructing an Extra Low ENergy Antiproton ring (ELENA), which will allow the further deceleration of antiprotons from the currently exploited Antiproton Decelerator (AD). In order to meet the challenges of ELENA the beam instrumentation systems of the CERN AD are being consolidated and upgraded. An updated controls architecture with a more flexible timing system needs to be adopted and obsolete systems must be replaced. This paper presents the status and plans for improved performance and measurement availability of the AD beam instrumentation with a decreased risk of failure.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-THPME176
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)
THPME177	A Novel Approach to Synchrotron Radiation Simulation	3687
SUSPSNE077	use link to see paper's listing under its alternate paper code
	G. Trad, E. Bravin, A. Goldblatt, S. Mazzoni, F. Roncarolo CERN, Geneva, Switzerland G. Trad LPSC, Grenoble Cedex, France
	At the Large Hadron Collider (LHC) at CERN, synchrotron radiation (SR) is used to continuously monitor the transverse properties of the beams. Unfortunately the machine and beam parameters are such that the useful radiation emitted inside a separation dipole, chosen as source, is diffraction limited affecting heavily the accuracy of the measurement. In order to deconvolve the diffraction effects from the acquired beam images and in order to design an alternative monitor based on a double slit interferometer an extensive study of the synchrotron light source and of the optical propagation has been made. This study is based on simulations combining together several existing tools: SRW for the source, ZEMAX for the transport and MATLAB for the "glue" and analysis of the results. The resulting tool is very powerful and can be easily adapted to other synchrotron radiation problems. In this paper the simulation package and the way it is used will be described as well as the results obtained for the LHC and SPS cases.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-THPME177
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)
THPME178	Status of the CLIC/CTF Beam Instrumentation R&D	3690
	M. Wendt, A. Benot-Morell, B.P. Bielawski, L.M. Bobb, E. Bravin, T. Lefèvre, F. Locci, S. Magnoni, S. Mazzoni, R. Pan, J.R. Towler, E.N. del Busto CERN, Geneva, Switzerland T. Aumeyr, S.T. Boogert, P. Karataev Royal Holloway, University of London, Surrey, United Kingdom W.A. Gillespie, D.A. Walsh University of Dundee, Nethergate, Dundee, Scotland, United Kingdom S.P. Jamison STFC/DL/ASTeC, Daresbury, Warrington, Cheshire, United Kingdom A. Lyapin, J. Snuverink JAI, Egham, Surrey, United Kingdom J.M. Nappa, S. Vilalte IN2P3-LAPP, Annecy-le-Vieux, France
	The Compact Linear Collider (CLIC) is an e+/e− collider based on the two-beam acceleration principle, proposed to support precision high-energy physics experiments in the energy range 0.5-3 TeV. To achieve a high luminosity of up to 6e34cm-2s−1, the transport and preservation of a low emittance beam is mandatory. A large number and great variety of beam diagnostics instruments is foreseen to verify and guarantee the required beam quality. We present the status of the beam diagnostics developments and experimental results accomplished at the CLIC Test Facility (CTF), including new ideas for simplification and cost reduction of the CLIC beam instrumentation.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-THPME178
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)
THPME179	Beam Diagnostics Measurements at 3MeV of the LINAC4 H− Beam at CERN	3694
	F. Zocca, J.C. Allica Santamaria, M. Duraffourg, G.J. Focker, D. Gerard, B. Kolad, L. Lenardon, M. Ludwig, U. Raich, F. Roncarolo, M. Sordet, J. Tan, J. Tassan-Viol, C. Vuitton CERN, Geneva, Switzerland A. Feschenko MIPT, Dolgoprudniy, Moscow Region, Russia A. Feschenko RAS/INR, Moscow, Russia
	As part of the CERN LHC injector chain upgrade, LINAC4 will accelerate H− ions to 160 MeV, replacing the old 50 MeV proton linac. The ion source, the Low Energy Beam Transfer (LEBT) line, the 3 MeV Radio Frequency Quadrupole and the Medium Energy Beam Transfer (MEBT) line hosting a chopper, have been first commissioned in a dedicated test stand and are now tested in the LINAC4 tunnel. Diagnostics devices are installed in the LEBT and MEBT line and in a movable diagnostics test bench which is temporarily added to the MEBT exit. The paper gives an overview of all the instruments used, including beam current transformers, beam position monitors, wire scanners and wire grids for transverse profile measurements, a longitudinal bunch shape monitor and a slit-and-grid emittance meter. The movable test bench also includes a spectrometer that allows measuring the beam energy spread in conjunction with a wire grid. The present understanding of the instrumentation performance is discussed and the measurement results that allowed characterizing the 3 MeV beam in the LINAC4 tunnel are summarized.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-THPME179
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)
THPME180	Vibration Measurement Experiment at TLS	3697
	C.C. Liang, C.K. Chou, S. Fann, C.K. Kuan, D. Lin, T.F. Lin, Y.-C. Liu, T.-C. Yupresenter NSRRC, Hsinchu, Taiwan Y.-C. Liu NTHU, Hsinchu, Taiwan
	The oncoming completion of Taiwan Photon Source is closely constructed beside Taiwan Light Source (TLS). Few civil works are continuously under construction. Building the measurement, recording and analysis platform of software and hardware is the one of the main directions of operation group. To diagnose the instability problem of the light source, the external influence must be eliminated. One of the factors causing the instability is the physical vibration. Vibration measurement helps to evaluate if newly installed equipments are suited for adding on or the influence of the earthquake to the stability of TLS and to improve the light source quality for users. Software has been developed to provide assistance to do some preliminary diagnoses at TLS. In this article, some actual cases in routine operation are also presented.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-THPME180
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)
THPME181	Progress on Beam Measurement and Control Systems for the ISIS Synchrotron	3700
	B. Jones, D.J. Adams, B.G. Pine, H. V. Smith, C.M. Warsop STFC/RAL/ISIS, Chilton, Didcot, Oxon, United Kingdom
	The ISIS Facility at the Rutherford Appleton Laboratory in the UK produces intense neutron and muon beams for condensed matter research. Its 50 Hz, 800 MeV proton synchrotron delivers a mean beam power of 0.2 MW to two spallation targets. Recent developments to beam control and measurement systems at ISIS are described. New PXI-based digitising hardware and custom software developed with LabVIEW have increased the capability to study beam behaviour. New, more flexible power supplies for steering and trim quadrupole correction magnets have been commissioned allowing greater control of beam orbits and envelopes. This paper looks at recent linear lattice measurements and attempts to identify the source of lattice errors.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-THPME181
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)
THPME182	Precise Instruments for Bunch Charge Measurement	3703
	A. Kalinin STFC/DL/ASTeC, Daresbury, Warrington, Cheshire, United Kingdom
	For the pulse charge q injected into a capacitor of a parallel resonating circuit, the oscillation voltage V on a series resistor R is V=qwRexp(—wt/2Q)sin(wt–1/2Q), t>τ, where w is the resonance frequency, Q>>1 is the quality factor and τ<<1/w is the pulse length. Of the two main parameters, R is known, and w can be found directly from the signal above. The quality factor contribution is low, and its rough estimation is sufficient to retain voltage accuracy. The observations above open a possibility of precise bunch charge measurement. We describe a bunch charge monitor that is a cavity with a lump capacitor as a low impedance coaxial line connected to a gap in the vacuum pipe. An LC electronic circuit is also presented. It integrates the single bunch current delivered by a Faraday Cup, or a Wall Current Monitor, or a Fast Current Transformer. The circuit has w~30MHz, Q~20, and with a Faraday Cup, the lower range is 10pC/V and the noise floor is about 20fC. Several such circuits are in use on the VELA injector in Daresbury Laboratory.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-THPME182
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)
THPME183	Longitudinal Beam Profile Measurements of the Microbunching Instability	3706
SUSPSNE075	use link to see paper's listing under its alternate paper code
	W. Shields, A. Finn, P. Karataev JAI, Egham, Surrey, United Kingdom R. Bartolini, I.P.S. Martin, G. Rehm DLS, Oxfordshire, United Kingdom
	The microbunching instability is a phenomenon characterized by the onset of radiation bursts above a threshold bunch current. These bursts consist of coherent emissions with wavelengths comparable to the bunch length and shorter. The instability has recently been observed at Diamond Light Source, a 3rd generation synchrotron. The operating conditions for triggering the instability at Diamond Light Source are well known, however measuring the spectral content of the resulting emissions is a more challenging investigation. A Michelson interferometer has been installed with the aim of recording the coherent spectrum from the bunches, using ultra-fast response Schottky Barrier Diode detectors. The longitudinal profile of the bunches can be estimated with subsequent analysis.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-THPME183
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)
THPME184	Improvement of Beam Imaging Systems through Optics Propagation Simulations	3709
	B. Bolzon, T. Lefèvre, S. Mazzoni CERN, Geneva, Switzerland A.S. Aryshev KEK, Ibaraki, Japan B. Bolzon, C.P. Welschpresenter The University of Liverpool, Liverpool, United Kingdom B. Bolzon, C.P. Welschpresenter Cockcroft Institute, Warrington, Cheshire, United Kingdom P. Karataev, K.O. Kruchinin Royal Holloway, University of London, Surrey, United Kingdom P. Karataev, K.O. Kruchinin JAI, Egham, Surrey, United Kingdom
	Optical Transition Radiation (OTR) is emitted when a charged particle crosses the interface between two media with different dielectric properties. It has become a wide-spread method for beam profile measurements. However, there are no tools to simulate the propagation of the OTR electric field through an optical system. Simulations using ZEMAX have been performed in order to quantify optical errors, such as aberrations, diffraction, depth of field and misalignment. This paper focuses on simulations of vertically polarized OTR photons with the aim of understanding what limits the resolution of realistic beam imaging systems.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-THPME184
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)
THPME185	Design and First Operation of a Silicon-based Non–invasive Beam Monitor	3712
	T. Cybulski, L.J. Devlinpresenter, C.P. Welsch Cockcroft Institute, Warrington, Cheshire, United Kingdom T. Cybulski, L.J. Devlinpresenter, K.P. Hennessy, C.P. Welsch The University of Liverpool, Liverpool, United Kingdom T.J. Jones STFC/DL, Daresbury, Warrington, Cheshire, United Kingdom A. Kacperek, B. Marsland, I. Taylor, A. Wray The Douglas Cyclotron, The Clatterbridge Cancer Centre NHS Foundation Trust, Wirral, United Kingdom
	Funding: Work supported by the EU under contract PITN-GA-2008-215080 and the STFC Cockcroft Institute Core Grant No. ST/G008248/1. Non–invasive, highly accurate and reliable beam monitors are a desired aim of any beam diagnostics design. Knowledge of beam parameters is essential in fundamental research, industry or medical applications with varying demands. It is critical for the optimization of ion beams used for cancer treatment. Ocular tumor treatment at the Clatterbridge Cancer Center (CCC) uses a 60 MeV proton beam. Disturbances introduced to a beam by intercepting devices risk affecting its energy and energy spread, thereby limiting its effectiveness for treatment. The advantageous semi-circular structure of the LHCb Vertex Locator (VELO) detector has been investigated in the QUASAR Group. It is an interesting option for a non-invasive online beam monitor relying on beam ‘halo’ measurements without disturbing the part of the beam used for treatment. This contribution discusses the measurement method, setup design and integration within the CCC treatment beam line.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-THPME185
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)
THPME186	Development of a BPM System using a Commercial FPGA Card and Digitizer Adaptor Module for FETS	3716
	G.E. Boorman, S.M. Gibson Royal Holloway, University of London, Surrey, United Kingdom R.T.P. D'Arcy, S. Jollypresenter UCL, London, United Kingdom S.R. Lawrie, A.P. Letchford STFC/RAL/ISIS, Chilton, Didcot, Oxon, United Kingdom
	A series of beam position monitors (BPMs) will be installed at the Front End Test Stand (FETS) at RAL as part of the 3 MeV Medium Energy Beam Transport (MEBT). The BPMs analyse 2 ms long, 60 mA beam pulses delivered to the MEBT by a 324 MHz Radio Frequency Quadrupole (RFQ). Initial linearity and resolution measurements from the prototype button BPMs are shown. The development of the algorithm for the processing of the BPM signals using a commercial PXI-based FPGA card is discussed and initial measurements of the electronics and signal processing are presented. The test-rig used to characterise each BPM and further develop the processing algorithm is described. The position and phase are measured several times throughout the duration of each pulse, and the measurements are made available via an EPICS server.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-THPME186
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)
THPME188	Using Principal Component Analysis to Find Correlations and Patterns at Diamond Light Source	3719
	C. Bloomer, G. Rehm DLS, Oxfordshire, United Kingdom
	Principal component analysis is a powerful data analysis tool, capable of reducing large complex data sets containing many variables. Examination of the principal components set allows the user to spot underlying trends and patterns that might otherwise be masked in a very large volume of data, or hidden in noise. Diamond Light Source archives many gigabytes of machine data every day, far more than any one human could effectively search through for correlations. Presented in this paper are some of the results from running principal component analysis on years of archived data in order to find underlying correlations that may otherwise have gone unnoticed. The advantages and limitations of the technique are discussed.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-THPME188
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)
THPME189	Simulation Studies of Diffraction Radiation	3722
	T. Aumeyr, R. Ainsworth, P. Karataev Royal Holloway, University of London, Surrey, United Kingdom M.G. Billing Cornell University (CLASSE), Cornell Laboratory for Accelerator-Based Sciences and Education, Ithaca, New York, USA L.M. Bobb, B. Bolzon, T. Lefèvre, S. Mazzoni CERN, Geneva, Switzerland
	Transition Radiation (TR) and Diffraction Radiation (DR) are produced when a relativistic charged particle moves through a medium or in the vicinity of a medium respectively. The target atoms are polarised by the electric field of the charged particle, which then oscillate thus emitting radiation with a very broad spectrum. The spatial-spectral properties of TR/DR are sensitive to various electron beam parameters. Several projects aim to measure the transverse (vertical) beam size using TR or DR. This paper reports on recent studies using Zemax, presenting studies on finite beam sizes and the orientation of the beam ellipse.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-THPME189
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)
THPME190	A Fibre Coupled, Low Power Laserwire Emittance Scanner at CERN LINAC4	3725
	S.M. Gibson, G.E. Boorman, A. Bosco, K.O. Kruchinin Royal Holloway, University of London, Surrey, United Kingdom C. Gabor STFC/RAL/ASTeC, Chilton, Didcot, Oxon, United Kingdom T. Hofmann, F. Roncarolo CERN, Geneva, Switzerland A.P. Letchford STFC/RAL/ISIS, Chilton, Didcot, Oxon, United Kingdom J.K. Pozimski, P. Savage Imperial College of Science and Technology, Department of Physics, London, United Kingdom
	The new LINAC4 will accelerate H− ions to 160 MeV and ultimately replace the existing 50 MeV LINAC2 in the injector chain for the LHC upgrade. During commissioning in 2013, a laserwire scanner and diamond strip detector were installed for non-invasive emittance measurements of the 3 MeV H− beam. Synergy with the 3 MeV H− Front End Test Stand at RAL, has stimulated collaborative development of a novel laserwire system. A low peak power (8kW) pulsed laser is fibre-coupled for remote installation and alignment free operation. Motorized focusing optics enable remote control of the thickness and position of the laserwire delivered to the vacuum chamber, in which the laser light neutralises a small fraction of H− ions. Undeflected by a dipole magnet, these H atoms drift downstream, where their spatial profile is recorded by a highly sensitive diamond strip detector with ns-time resolution. We present first tests of the laserwire emittance scanner, including measurements of the photo detachment signal with respect to the background from residual gas interactions. The first laserwire transverse beam profile and emittance measurements are compared with conventional slit-grid diagnostics.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-THPME190
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)
THPME191	Simulation Results of the FETS Laserwire Emittance Scanner	3729
	K.O. Kruchinin, A. Bosco, S.M. Gibson, P. Karataev Royal Holloway, University of London, Surrey, United Kingdom D.C. Faircloth STFC/RAL, Chilton, Didcot, Oxon, United Kingdom C. Gabor STFC/RAL/ASTeC, Chilton, Didcot, Oxon, United Kingdom S.R. Lawrie STFC/RAL/ISIS, Chilton, Didcot, Oxon, United Kingdom J.K. Pozimski Imperial College of Science and Technology, Department of Physics, London, United Kingdom
	The Front End Test Stand (FETS) at Rutherford Appleton Laboratory (RAL) has been developed to demonstrate a high current (60 mA) H− beam with the energy of 3 MeV that will be required for future proton drivers. At such high power beam machine a non-invasive diagnostics is required. To measure the emittance of the ion beam a laserwire scanner is being developed. A high power laser will scan across the H− ion beam. The H− particles will be neutralized via a photo-detachment process producing a stream of fast neutral hydrogen atoms bearing information about the phase space distribution of the initial H− beam. To design an effective detection system and optimize its parameters a simulation of the processes at the interaction point is required. We present recent simulation results of theц FETS laserwire system. Simulations were performed using measured data of the laser propagation and ion beam distribution, obtained with General Particle Tracer code.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-THPME191
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)
THPME192	Assembly and Installation of Beam Instrumentation for the ASTA Front-end Diagnostic Table	3732
	D.J. Crawford, R. Andrews, B.J. Fellenz, D. Franck, T.W. Hamerla, J. Ruanpresenter, D. Snee Fermilab, Batavia, Illinois, USA
	Funding: This work was supported by the Fermi Research Alliance, LLC under Contract No. DE-AC02-07CH11359 with the U.S. Department of Energy. Early stages of commissioning the Advanced Superconducting Test Accelerator (ASTA) at Fermilab have begun. The Front-end consists of a 1.5 cell normal conducting RF gun resonating at 1.3 GHz with a gradient of up to 40 MV/m, a cesium telluride cathode for photoelectron production, a pulsed 264 nm ultra-violet (UV) laser delivery system, and a Diagnostic Table upon which instrumentation is mounted for measuring the characteristics of the photoelectron beam. We report on the design, construction, and early experience with the Diagnostic Table.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-THPME192
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)
THPME193	GUI Development for the Drive Laser at Fermilab's ASTA Facility	3735
	D.R. Edstrom, E.R. Harms, T.R. Johnson, A.H. Lumpkin, J. Ruanpresenter, J.K. Santucci Fermilab, Batavia, Illinois, USA
	A comprehensive set of graphical user interfaces is being developed for the drive laser of the Advanced Superconducting Test Accelerator (ASTA) facility at Fermilab. These interfaces have been designed in Synoptic, a Java-based GUI development platform with credential-dependent access to the Fermilab accelerator controls network. Such implementation facilitates the user's ability to monitor and control many aspects of the drive laser system in an intuitive environment, as well as timely updates on the part of the developers made necessary by the evolving drive laser system. Furthermore, the current interface hierarchy readily allows integration into the larger pool of Synoptic applications being developed for other subsystems at ASTA.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-THPME193
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)
THPME195	Nondestructive Beam Current Monitor for the 88-inch Cyclotron	3738
	M. Kireeff Covo LBNL, Berkeley, California, USA
	Funding: This work was supported by the Director, Office of Science, Office of Nuclear Physics, Division of Nuclear Physics, US Department of Energy under Contract No. DE-AC02-05CH11231. A fast current transformer is mounted in the staging line of the Berkeley 88-inch isochronous cyclotron. The measured signal is amplified and connected to the input of a lock-in amplifier. The lock-in amplifier detects the signal vector from the input signal at the RF reference frequency of the cyclotron second harmonic. The magnitude of the signal detected is calibrated against a Faraday cup and shows the beam current leaving the cyclotron.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-THPME195
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)
THPME196	Low Energy Coded Aperture Performance at the CesrTA x-Ray Beam Size Monitor	3741
	D.P. Peterson, J.P. Alexander, A. Chatterjee, M. P. Ehrlichman, B.K. Heltsley, A. Lyndaker, N.T. Rider, D. L. Rubin, R.D. Seeley, J.P. Shankspresenter Cornell University (CLASSE), Cornell Laboratory for Accelerator-Based Sciences and Education, Ithaca, New York, USA J.W. Flanagan KEK, Ibaraki, Japan
	Funding: U.S. National Science Foundation PHY-0734867, PHY-1002467, PHYS-1068662, U.S. Department of Energy DE-FC02-08ER41538, DE-SC0006505 We report on the design and performance of coded aperture optics elements in the CesrTA x-ray beam size monitor (xBSM). Resolution must be sufficient to allow single-turn measurements of vertical beam sizes of order 10um by imaging synchrotron radiation photons onto a one-dimensional photodiode array. Measurements with beam energies above 2.1GeV and current above 0.1mA can be performed with a single-slit (pinhole) optic. At lower energy or current, small beam size measurements are limited by the diffractive width of a pinhole image and counting statistics. A coded aperture is a multi-slit mask that can improve on the resolution of a pinhole in two ways: higher average transparency improves counting statistics; and the slit pattern and masking transparency can be designed to obtain a diffractive image with narrower features. We have previously implemented coded apertures that are uniform redundant arrays (URA). A new coded aperture design is optimized for imaging with 1.8 GeV beam energy (1.9keV average x-ray energy) and with beam sizes below 20um. Resolution measurements were made in December 2013. Performance of the new coded aperture is compared to the pinhole and the URA.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-THPME196
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)
THPME197	Power Saving Status in the NSRRC	3744
	J.-C. Chang, Y.C. Chang, Y.F. Chiu, Y.-C. Chung, C.W. Hsu, Y.-C. Lin, C.Y. Liu, Y.-H. Liupresenter, Z.-D. Tsai, T.-S. Ueng NSRRC, Hsinchu, Taiwan
	National Synchrotron Radiation Research Center (NSRRC), Taiwan has completed the construction of the civil and utility system engineering of the Taiwan Photon Source (TPS) in 2013 and 2014, respectively. The contract power capacities of the Taiwan Light Source (TLS) and the TPS with the Taiwan Power Company (TPC) are 5.5MW and 3MW currently, respectively. The ultimate power consumption of the TPS is estimated about 12.5MW. To cope with increasing power requirement in the near future, we have been conducting several power saving schemes for years. They include power consumption control, optimization of chillers operation, air conditioning system improvement, power factor improvement, application of heat pump, and promotion for power saving.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-THPME197
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)
THPME198	TPS Storage and Booster Ring Cable Tray Installation Status and CIA Design Arrangement	3748
	Y.-H. Liu, J.-R. Chen NSRRC, Hsinchu, Taiwan
	The TPS infrastructure and the whole subsystems for the accelerator are now approach to finish. The cable trays for booster and storage ring in tunnel are almost finished. The 3 layers cable trays for booster ring are for dipole, quaturpole power supply cable and IC/VA signal cable respectively. The designed for limited space for cooling water below the cable tray and the magnet girder above. The storage ring cable tray also designed for different subsystems, and separate the power and signal layer. The power racks for all subsystem are located in control and instrument area (CIA). The magnet and ID power supply are placed in the 1st floor and the IC, VA, MP and FE control racks are placed in the 2nd floor. The separation between the power and signal cable tray are noticed for the whole path inside tunnel and CIA. Now the subsystem is under installation, although it is hard to cabling but it would not be the problem.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-THPME198
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)
THPME200	Status of the Utility System Construction for the 3 GeV TPS Storage Ring	3751
	J.-C. Chang, W.S. Chan, C.S. Chen, J.-R. Chen, Y.-C. Chung, C.W. Hsu, K.C. Kuo, Y.-C. Lin, C.Y. Liu, Y.-H. Liupresenter, Z.-D. Tsai, T.-S. Ueng NSRRC, Hsinchu, Taiwan
	The construction of the utility system for the 3.0 GeV Taiwan Photon Source (TPS) was started in the end of 2009. The utility building for the TPS ring had been completed in the end of 2013. The building use license had been approved in Sep. 2013. The whole construction engineering has been completed. The acceptance test is scheduled on July 2014. Total budget of this construction is about four million dollars. This utility system presented in this paper includes the cooling water, air conditioning, electrical power, and compressed air systems.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-THPME200
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)
THPME201	Survey Network of NESTOR Facility	3754
SUSPSNE105	use link to see paper's listing under its alternate paper code
	O. Bezditko, V.E. Ivashchenko, I.M. Karnaukhov, A. Mytsykov, O.V. Ryezayev, A.Y. Zelinsky NSC/KIPT, Kharkov, Ukraine
	For successful operation of X-ray source NESTOR it is necessary that all the focusing elements should be installed in design position according to the designed lattice, which should provide a low emittance value and small beam size at the interaction point . Accuracies of NESTOR electromagnetic elements installation are 100 mkm in the transverse coordinate, 200 mkm in the longitudinal coordinate and 200 mrad for all three rotation freedom. To achieve these objectives coordinate net, which allows us to align the elements, was designed and developed in the hall of the NESTOR storage ring. The whole process is controlled by means of optical instruments and theodolite 3T2KP with angular accuracy of 2" and laser meter system LMS - 100, which measure the distance with micron accuracy. The final errors budget consists of the accuracy of the measuring instruments, the quality of elements manufacture and assembling. A well-planned methodology allows to realize the design parameters of the X-ray generator "NESTOR " and was proved by experiments of the facility.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-THPME201
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)