IBIC2014 - List of Keywords (diagnostics)

Paper	Title	Other Keywords	Page
MOIXB1	Welcome to the 2014 International Beam Instrumentation Conference	instrumentation, beam-diagnostic	1
	S.R. Smith SLAC, Menlo Park, California, USA
	The chairperson welcomes participants to Monterey for the 3rd IBIC and opens the conference.
	Slides MOIXB1 [1.462 MB]
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MOIZB1	NSLS2 Diagnostic Systems Commissioning and Measurements	storage-ring, booster, injection, electronics	16
	W.X. Cheng, B. Bacha, K. Ha, Y. Hu, M.A. Maggipinto, J. Mead, D. Padrazo, O. Singh, H. Xu BNL, Upton, Long Island, New York, USA
	As the newest and most advanced third generation light source, NSLS2 commissioning has started recently. A total of 50mA stored beam was achieved in the storage ring. Most of the diagnostic systems have been commissioned with beams and proved to be critical to the success of machine commissioning. This paper will present beam commissioning results of various diagnostic systems in the NSLS2 injector and storage ring, including profile monitors, current monitors, and position monitors. We will discuss some preliminary machine measurements as well, such as beam current and lifetime, tune, beam stability, filling pattern etc.
	Slides MOIZB1 [6.187 MB]
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MOPF19	Design of a Profile Monitor with 12 Inches of Actuation for FRIB	alignment, interface, vacuum, feedback	97
	S. Rodriguez Esparza, G. Kiupel, I.N. Nesterenko FRIB, East Lansing, Michigan, USA
	Funding: FACILITY FOR RARE ISOTOPE BEAMS Actuated diagnostics present additional challenges that static diagnostics devices do not such as alignment, stability, and incorporating an appropriate drive mechanism. These challenges become even more apparent as the actuaded length increases. At the Facility for Rare Isotope Beams (FRIB) we plan on using a number of actuated diagnostics devices including a Profile Monitor (AKA: Wire Scanner) with 12 inches of actuation. The Profile Monitor uses tungsten wires to traverse the beam pipe aperture to measure the beam intensity with respect to it’s location in the X-Y plane. This paper will detail the design of the 12 inch Profile Monitor and how it is able to overcome the stability, alignment, and drive issues that come with the 12 inches of actuation.
	Poster MOPF19 [1.128 MB]
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MOPF20	Diagnosing NSLS-II: A New Advanced Synchrotron Light Source	storage-ring, controls, booster, linac	100
	Y. Hu, L.R. Dalesio, O. Singh, H. Xu BNL, Upton, Long Island, New York, USA
	NSLS-II, the successor to NSLS (National Synchrotron Light Source) at Brookhaven National Lab, is scheduled to be open to users worldwide by 2015 as a world-class advanced synchrotron light source because of its unique features: its half-mile-circumference (792 m) Storage Ring provides the highest beam intensity (500 mA) at medium-energy (3 GeV) with sub-nm-rad horizontal emittance (down to 0.5 nm -rad) and diffraction-limited vertical emittance at a wavelength of 1 Å (<8 pm-rad). As the eyes of NSLS-II accelerators to observe fascinating particle beams, beam diagnostics and controls systems are designed to monitor and diagnose the electron beam quality so that NSLS-II could be tuned up to reach its highest performance. The design and implementation of NSLS-II diagnostics and controls are described. Preliminary commissioning results of NSLS-II accelerators, including Linac, Booster, and Storage Ring, are presented.
	Poster MOPF20 [1.105 MB]
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MOPD05	Dual Transverse and Longitudinal Streak Camera Imaging at ELSA	damping, cavity, synchrotron, electron	144
	M.T. Switka, F. Frommberger, P. Hänisch, W. Hillert, M. Schedler ELSA, Bonn, Germany
	Funding: Funded by the German Research Foundation (DFG) within Colaborative Research Center (SFB/TRR) 16 The electron pulse stretcher ring ELSA located at Bonn University provides 0.5 – 3.5 GeV polarized and non-polarized electron beams for external experimental stations. A streak camera system has been installed to capture time resolved images of beam dynamics ranging from nanoseconds to several milliseconds. Particular attention was drawn to the capability of simultaneous imaging of both transverse beam dimensions, hence providing information of all spatial dimensions in one synchroscan or slow sweep measurement. Incoherent and coherent beam instabilities, especially at high stored beam currents, are subject of analysis due to the planned intensity upgrade towards 200 mA for standard operation. The current resolution performance of the imaging system and machine relevant measurements are presented.
	Poster MOPD05 [6.133 MB]
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MOPD06	Electron Beam Diagnostics for Short Pulse FEL Schemes at CLARA	electron, laser, FEL, simulation	147
	S. Spampinati, D. Newton Cockcroft Institute, Warrington, Cheshire, United Kingdom D. Newton The University of Liverpool, Liverpool, United Kingdom
	CLARA (Compact Linear Accelerator for Research and Applications) [1] is a proposed 250 MeV, 100-400 nm FEL test facility at Daresbury Laboratory. The purpose of CLARA is to test and validate new FEL schemes in areas such as ultra-short pulse generation, temporal coherence and pulse-tailoring. Some of the schemes that can be tested at CLARA depend on a manipulation of the electron beam properties with characteristic scales shorter than the electron beam and require a 30 - 50 μm modulation of the beam energy acquired via the interaction with an infrared laser beam in a short undulator. In this article we describe the electron beam diagnostics required to carry on these experiments.
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MOPD08	A Double-Prism Spectrometer for the Longitudinal Diagnosis of Femtosecond Electron Bunches with Mid-Infrared Transition Radiation	radiation, electron, detector, FEL	157
	S. Wunderlich, E. Hass, B. Schmidt, M. Yan DESY, Hamburg, Germany
	Funding: The project has been supported by the BMBF under contract 05K10GU2 & FS FLASH 301. Electron bunch lengths in the sub-10 fs regime and charges of a few tens of picocoulombs are parameters required for free-electron lasers [] and are also a consequence from the intrinsic process in laser-driven plasma wake field acceleration []. Since the coherent spectrum of transition radiation of these bunches carries the information on the longitudinal bunch profile in the form factor, the spectroscopy of transition radiation is an attractive method to determine the electron bunch length. A double-prism spectrometer has been developed and demonstrated for the single-stage measurement of mid-infrared transition radiation between 2 μm and 18 μm. The spectrometer facilitates single-shot spectral measurements with high signal-to-noise ratio utilising a line array of mercury cadmium telluride detectors. In this contribution, we present the spectrometer and measurements of electron bunches of the Free-Electron Laser in Hamburg (FLASH) at DESY. The results are compared to established bunch length monitors which are a multi-stage grating spectrometer for transition radiation and a transverse deflecting structure accessing the longitudinal phase space of the electron bunches directly. J. Rönsch-Schulenburg et al., Proceedings of FEL 2014, TUB04 (2014), to be published **O. Lundh et al., Nature Physics 7, 219–222 (2011)
	Poster MOPD08 [1.346 MB]
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MOPD10	New Results Of FERMI FEL1 EOS Diagnostics With Full Optical Synchronization	laser, FEL, electron, electronics	165
	M. Veronese, E. Allaria, P. Cinquegrana, E. Ferrari, F. Rossi, P. Sigalotti, C. Spezzani Elettra-Sincrotrone Trieste S.C.p.A., Basovizza, Italy E. Ferrari Università degli Studi di Trieste, Trieste, Italy
	The Electro Optical Sampling diagnostics (EOS) of the FERMI FEL has been recently upgraded with a full optical synchronization of its dedicated femtosecond fiber laser to the ultra-stable optical pulsed timing system of FERMI. For this purpose a dual synchronization electronics has been developed and installed. It exploits a mixed error signal derived from both optical to electrical conversion and from a second harmonic generation based optical phase detection. For this second part a new optical setup including a cross correlator has been installed. The operation of the EOS has greatly benefited from the upgrade. The arrival time measurements have been compared with the ones from the bunch arrival monitor diagnostics (BAM) showing very good agreement. This new setup has also allowed to improve the bunch profile measurement. Some examples of measurement with ZnTe and GaP are presented. Finally, usability and operator friendliness of the new setup are also discussed.
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MOPD15	CW Beam Stability Analysis in Time and Frequency Domain	electron, high-voltage, radiation, laser	179
	M. Kuntzsch, M. Gensch, B.W. Green, S. Kovalev, U. Lehnert, P. Michel, R. Schurig, J. Teichert HZDR, Dresden, Germany
	The superconducting quasi CW Linac ELBE has been characterized in terms of energy and timing stability. The measurement results presented show a combination of a laser-based bunch arrival-time measurements (BAM), a fast beam position monitor (BPM) readout with single bunch resolution and a compression monitor (BCM) based on a fast pyro-electric detector. By changing the bunch compression factor a separation and identification of jitter sources has been achieved. The quasi CW mode of operation enables frequency domain data analysis with high dynamic range, which gives a better understanding of the main sources of jitter. Experimental results for both injectors (thermionic DC, superconducting RF) are presented.
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MOPD26	A Bunch Extension Monitor for the Spiral2 LINAC	linac, ion, detector, photon	212
	J.L. Vignet, R.V. Revenko GANIL, Caen, France
	Measurements of the longitudinal shape of bunched beam particles are crucial for optimization and control of LINAC beam parameters and maximization of its integrated luminosity. The non-interceptive bunch extension monitor for the LINAC at the SPIRAL2 facility is being developed at GANIL. Five bunch extension monitors will be installed at the beginning of the LINAC between superconducting cavities. The principle of operation is based on the registration of x-rays induced by ions of accelerator beam interacting with a thin tungsten wire positioned on the beam path. The monitor consists of two parts: a system for wire insertion and positioning, and an x-ray detector based on microchannel plates (MCPs). A detector prototype has been developed over the past three years and was tested using both protons and heavy ions beams.
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TUIZB1	Radiation Sources and Their Application for Beam Profile Diagnostics	radiation, photon, electron, optics	263
	G. Kube DESY, Hamburg, Germany
	Radiation generated by high-energy particle beams is widely used for beam diagnostic purposes. Depending on the mechanism of radiation generation, the emitted wavelength range extends from the THz up to the X-ray region, thus allowing the measurement of beam profiles in the longitudinal and the transverse plane over a wide range. In this talk, basic considerations for radiation based profile measurements will be discussed with special emphasis on the mechanism of radiation generation and the impact on beam diagnostic measurements.
	Slides TUIZB1 [4.803 MB]
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TUCZB1	Novel Emittance Diagnostics for Diffraction Limited Light Sources Based on X-ray Fresnel Diffractometry	emittance, electron, radiation, betatron	274
	M. Masaki, Y. Shimosaki, S. Takano, M. Takao JASRI/SPring-8, Hyogo-ken, Japan
	A novel emittance diagnostics technique with high sensitivity using X-ray Fresnel diffraction by a single slit has been developed to measure micron-order electron beam sizes at insertion devices (IDs) of photon beamlines. The X-ray Fresnel diffractometry (XFD)* is promising for diagnostics especially of a so-called diffraction limited storage ring (DLSR) with ultra-low emittance. In the DLSR, due to inevitable field errors of strong quadrupole and sextupole magnets, unwanted distortion of lattice functions and local betatron coupling will result in a different light source size at each beamline. Therefore, measurements of electron beam sizes at the ID source points will be essential to ensure the absence of degradation of brilliance and transverse coherence of radiation at the beamlines. The XFD observes a double-lobed diffraction pattern that emerges by optimizing the single slit width. The principle is based on a correlation between the depth of a median dip in the double-lobed pattern and the light source size at the ID. The validity of the new technique was theoretically and experimentally studied. The achievable resolution of the XFD will be also discussed. * M. Masaki, et al.,"X-ray Fresnel Diffractometry for Ultra-Low Emittance Diagnostics of Next Generation Synchrotron Light Sources", submitted to Phys. Rev.ST-AB.
	Slides TUCZB1 [5.456 MB]
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TUPF13	Diamond-Based Photon BPMs for Fast Electron-Beam Diagnostics in Synchrotron Radiation Sources	electron, photon, radiation, detector	342
	M. Antonelli, G. Cautero, D. Giuressi, 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
	Electron-beam stability is amongst the primary concerns in current Synchrotron Radiation (SR) sources; in particular, in third-generation SR facilities high-brightness beamlines using undulator radiation are extremely sensitive to electron-beam oscillations. Orbit stabilization has been intensively addressed in the past years and many SR machines have been equipped with a Fast Orbit Feedback (FOFB) based on electron Beam-Position Monitors (eBPMs). On the other hand, photon Beam-Position Monitors (pBPMs), besides providing beamline users with crucial calibration data, are also a useful tool for keeping the electron beam under control, by monitoring position and intensity of the delivered radiation. The machine control system can take advantage of this information in order to improve the stability of the electron-beam. A diagnostic beamline, utilizing a couple of fast pBPMs based on single-crystal CVD diamond detectors, has been built and inserted into the central dead-end outlet of one of Elettra’s bending-magnets. Tests have been carried out both during normal machine operations and by deliberately moving the orbit during dedicated shifts. Owing to the outstanding properties of diamond in terms of speed and radiation hardness, the results show how the aforementioned system allows the beam position to be monitored with sub-micrometric precision at the demanding readout rates required by the FOFB. The radiation hardness of the sensors allows the operation over extended periods of time without special maintenance. Therefore, this system is particularly suited for storage-ring sections lacking in electron-beam monitoring and the tested diagnostic line represents a demonstrator for future implementation of pBPMs at several bending-magnet front ends of Elettra.
	Poster TUPF13 [3.409 MB]
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TUPF18	Development of a Button BPM for the LCLS-II project	wakefield, electron, feedback, HOM	361
	A. Lunin, T.N. Khabiboulline, N. Solyak, V.P. Yakovlev Fermilab, Batavia, Illinois, USA
	A high sensitivity button BPM is under development for a linac section of the LCLS-II project. Since the LCLS-II linac will operate with bunch charge as low as 10 pC, we analyse various options for pickup button and feedthrough in order to maximize the BPM output signal at low charge regime. As a result the conceptual BPM design is proposed including an analytical estimation of the BPM performance as well as numerical simulation with CST Particle Studio and ANSYS HFSS. Both numerical methods show a good agreement of BPM output signals for various design parameters. Finally we describe the signal processing scheme and the electronics we are going to use.
	Poster TUPF18 [0.846 MB]
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TUPD16	Development of the Transverse Beam Profile Monitors for the PAL-XFEL	electron, radiation, vacuum, target	452
	I.Y. Kim, J.Y. Choi, H. Heo, H.-S. Kang, C. Kim, G. Mun, B.G. Oh, S.J. Park PAL, Pohang, Kyungbuk, Republic of Korea
	The PAL-XFEL is an X-ray free electron laser under construnction at the Pohang Accelerator Laboratory (PAL), Korea. In the PAL-XFEL, the electron beam can make coherent optical transition radiation (COTR) due to the microbunching instability in the compressed electron beam. In order to obtain transverse beam profiles without the COTR problem, we are developing scintillating screen monitors (with the geometric suppress method) and wire scanners. In this paper, we report test results at the test facility and progress in the development of the screen monitor and the wire scanner for the PAL-XFEL.
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WEIXB1	LCLS Beam Diagnostics	electron, undulator, cavity, laser	475
	H. Loos SLAC, Menlo Park, California, USA
	Funding: Work supported by DOE contract DE-AC03-76SF00515 An extensive set of beam diagnostics has been one of the factors in the successful commissioning and operation of the Linac Coherent Light Source (LCLS) x-ray FEL over the last seven years. The originally developed and installed diagnostics were geared towards measuring the electron beam parameters of the LCLS design specifications. Since then, a number of improved and new diagnostics have been implemented to accommodate a much wider range of beam parameters and to overcome the challenges of diagnostics for a high brightness electron beam. Plans for the diagnostics of the LCLS-II project with its high repetition rate and high beam power and ongoing developments will also be discussed.
	Slides WEIXB1 [4.408 MB]
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WECYB2	NSLS-II RF Beam Position Monitor Comissioning Update	timing, electronics, storage-ring, booster	500
	J. Mead, A. Caracappa, W.X. Cheng, C. Danneil, J.H. De Long, A.J. Della Penna, K. Ha, B.N. Kosciuk, M.A. Maggipinto, D. Padrazo, B. Podobedov, O. Singh, Y. Tian, K. Vetter BNL, Upton, Long Island, New York, USA
	The National Synchrotron Light Source II (NSLS-II) is a third generation light source currently in the commissioning stage at Brookhaven National Laboratory. The project includes a highly optimized, ultra-low emittance, 3GeV electron storage ring, linac pre-injector and full energy booster synchrotron. Successful commissioning of the booster began in November 2012, followed by the ongoing commissioning of the NSLS-II 3GeV electron storage ring which began in March 2014. With those particles first injected, came a value realization of the in-house developed RF Beam Position Monitor (RF BPM). This in-house design knowledge proved to be extremely valuable to match BPM configurations and requirements quickly when needed with various injected beam conditions. The RF BPM system was envisioned and undertaken to meet or exceed the demanding applications of a third generation light source. This internal R&D project has since matured to become a fully realized diagnostic system with over 250 modules currently operational. Initial BPM performance and applications will be discussed.
	Slides WECYB2 [3.041 MB]
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WEPF02	A Toroid Based Bunch Charge Monitor System with Machine Protection Features for FLASH and XFEL	timing, operation, controls, FPGA	521
	M. Werner, T. Lensch, J. Lund-Nielsen, Re. Neumann, D. Nölle, N. Wentowski DESY, Hamburg, Germany
	For the superconducting linear accelerators FLASH and XFEL, a new toroid based charge measurement system has been designed as a standard diagnostic tool. It is also a sensor for the bunch charge stabilization feedback and for machine protection. The system is based on MTCA.4 technology and will offer a high dynamic range and high sensitivity. The machine protection features will cover recognition of poor transmission between adjacent toroid sensors, bunch pattern consistency checks, and protection of the beam dumps. The concept, an overview of the algorithms, and the implementation will be described. A summary of first operation experience at FLASH will be presented.
	Poster WEPF02 [1.113 MB]
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WEPF07	Optimization of a Short Faraday Cup for Low-Energy Ions Using Numerical Simulations	electron, ion, simulation, linac	544
	A.G. Sosa, E. Bravin, E.D. Cantero CERN, Geneva, Switzerland C.P. Welsch Cockcroft Institute, Warrington, Cheshire, United Kingdom C.P. Welsch The University of Liverpool, Liverpool, United Kingdom
	Funding: CATHI is a Marie Curie Initial Training Network funded by the European Commission under Grant Agreement Number PITN-GA-2010-264330. ISOLDE, the heavy-ion facility at CERN is undergoing a major upgrade with the installation of a superconducting LINAC that will allow post-acceleration of ion beams up to 10 MeV/u. In this framework, customized beam diagnostics are being developed in order to fulfill the design requirements as well as to fit in the compact diagnostic boxes foreseen. The main detector of this system is a compact Faraday cup that will measure beam intensities in the range of 1 pA to 1 nA. In this contribution, simulation results of electrostatic fields and particle tracking are detailed for different Faraday cup prototypes taking into account the energy spectrum and angle of emission of the ion-induced secondary electrons.
	Poster WEPF07 [1.282 MB]
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WEPF09	Introduction to the Test Result of Turbo-ICT in PAL-ITF	monitoring, laser, electron, pick-up	553
	H. J. Choi, M.S. Chae, H.-S. Kang, S.J. Park PAL, Pohang, Kyungbuk, Republic of Korea
	Pohang Accelerator Laboratory (PAL) built a PAL-ITF (Injector Test Facility) at the end of 2012 to successfully complete PAL-XFEL (X-ray Free Electron Laser) in 2015. The PAL-ITF is equipped with various kinds of diagnostic equipment to produce high-quality electron bunches. The three main parameters that an injection testing facility should measure are charge, energy and emittance. Although ICT and Faraday Cup were installed to measure beam charge, the noise generated in a klystron modulator not only interrupted accurate measurement but prevented low charges under tens of pC from being measured. Due to the changes in the overall voltage level of ITF, integration of ICT measured value failed to maintain perfect accuracy in terms of methodology (measured value continuously changed by ± 5pC). Accordingly, to solve the noise problems and accurately measure the quantity of electron beam charge, Turbo-ICT was installed. This paper focuses on the processes and test result of electric bunch charge quantity measurements using Turbo-ICT.
	Poster WEPF09 [2.807 MB]
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WEPF12	A Diagnostics of Ion Beam from 28 GHz Electron Cyclotron Resonance Ion Source	ion, ECR, ion-source, emittance	561
	J.W. Ok, S. Choi, J.G. Hong, S.J. Kim, B.S. Lee, J.Y. Park, C.S. Shin, M. Won, J.H. Yoon Korea Basic Science Institute, Busan, Republic of Korea J. Bahng Kyungpook National University, Daegu, Republic of Korea
	A neutron radiography facility utilizing a 28 GHz superconducting electron cyclotron resonance (ECR) ion source and a heavy ion accelerator is now under construction at Korea Basic Science Institute (KSBI). In order to generate a proper energy distribution of neutron, a lithium ion beam is considered. It will be accelerated up to the energy of 2.7 MeV/u by using a radio frequency quadrupole (RFQ) and drift tube linear (DTL) accelerator. The 28 GHz superconducting ECR ion source, which is the state of the art of an ion injector, has been built to produce the lithium ion beam. The ion beam of 12 keV/u would be extracted to low energy beam transport (LEBT) system, which is comprised of several types of electromagnets to focus and deliver the beam, effectively. After transporting an ion beam through LEBT, RFQ once accelerates the ion beam from 12 to 500 keV/u. Finally, we can achieve the final beam energy at the DTL. Before the ion beam is delivered to accelerator, the requirements should be satisfied to confirm the status of beam. For this, we developed the instruments in the diagnostic chamber in the middle of LEBT system to observe the beam dynamics. An analyzing electromagnet, slits, wire scanners and faraday cup will be used to perform a diagnosis of ion beam characteristics. We will present and discuss the experimental results of ion beam profile and the current after selecting a required charge state.
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WEPF13	The Status of Beam Diagnostics for the Hie-Isolde Linac at Cern	emittance, detector, TRIUMF, simulation	565
	E.D. Cantero, W. Andreazza, E. Bravin, A.G. Sosa CERN, Geneva, Switzerland A.G. Sosa Cockcroft Institute, Warrington, Cheshire, United Kingdom A.G. Sosa The University of Liverpool, Liverpool, United Kingdom
	Funding: CATHI is a Marie Curie Initial Training Network funded by the European Commission under Grant Agreement Number PITN-GA-2010-264330. The HIE-ISOLDE project aims at upgrading the CERN ISOLDE radioactive ion beam facility for higher beam intensities and higher beam energies. New beam diagnostic devices have to be developed as part of this upgrade, in particular for the measurement of intensity, energy, transverse and longitudinal profiles, and transverse emittance. The beam energy ranges from 300 keV/u to 10 MeV/u and beam intensities are between 1 pA and 1 nA. Faraday cups will be used for the measurement of the beam intensity while silicon detectors will be used for the energy and longitudinal profile measurements. The transverse profiles will be measured by moving a V-shaped slit in front of a Faraday cup and the beam position will be calculated from the profiles. The transverse emittance can be measured using the existing REX-ISOLDE slit and grid system, or by the combined use of two scanning slits and a Faraday cup. The final design of the mentioned devices will be presented in this contribution, including the results of the experimental validation tests performed on prototypes during the last two years.
	Poster WEPF13 [4.263 MB]
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WEPF15	Status of the Standard Diagnostic Systems of the European XFEL	cavity, electronics, undulator, gun	569
	D. Nölle DESY, Hamburg, Germany
	The European XFEL, an X-ray free-electron-laser user facility based on a 17.5 GeV superconducting LINAC, is currently under construction close to the DESY site at Hamburg. DESY is in charge of the construction of the accelerator. This contribution will report the status of the standard diagnostic systems of this facility. The design phase has finished for all main systems; most of the components are in production or are already produced. This paper will show details of the main systems, their installation issues and will report on the further time schedule. Furthermore, the experience from the commissioning of the RF gun with beam will be reported.
	Poster WEPF15 [5.427 MB]
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WEPF17	Error Analysis for Pepperpot Emittance Measurements Redux: Correlated Phase Spaces	emittance, background, target, ion	579
	S.M. Lidia FRIB, East Lansing, Michigan, USA K. Murphy LBNL, Berkeley, California, USA
	Funding: This work was supported by the Director, Office of Science, Office of Fusion Energy Sciences, of the U.S. Department of Energy under Contract No. DE-AC02-05CH11231. Recently, Jolly et al. presented an analysis of the rms emittance measurement errors from a first principles approach [1]. Their approach demonstrated the propagation of errors in the single-plane rms emittance determination from several instrument and beam related sources. We have extended the analysis of error propagation and estimation to the fully correlated 4-D phase space emittances obtained from pepperpot measurements. We present the calculation of the variances using a Cholesky decomposition approach. Pepperpot data from recent experiments on the NDCX-II beamline are described, and estimates of the emittances and measurement errors for the 4-D as well as the projected rms emittances in this coupled system are presented. [1] S. Jolly, et al., “Data Acquisition and Error Analysis for Pepperpot Emittance Measurements”, Proceedings of DIPAC ’09, WEOA03.
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WEPF28	Failure Mode and Effects Analysis of the Beam Intensity Control for the SPIRAL2 Accelerator	controls, linac, proton, ion	613
	C. Jamet, T.A. Andre, B. Ducoudret, G. Ledu, S.L. Leloir, S. Loret, C. Potier de courcy GANIL, Caen, France
	The first phase of the SPIRAL2 project includes a driver and its associated new experimental areas (S3 and NFS caves). The accelerator, located in Caen (France), is based on a linear solution composed of a normal conducting RFQ and a superconducting linac. Intense primary stable beams (deuterons, protons, light and heavy ions) will be accelerated at various energies for nuclear physics. The beam intensity monitoring is a part of the operating range control of the facility. A high level of requirements is imposed on the intensity control system. In 2013, a failure mode and effects analysis (FMEA) was performed by a specialized company helped by the GANIL’s Electronic group. This paper presents the analysis and evolutions of the electronic chain of measurement and control.
	Poster WEPF28 [1.130 MB]
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THIXB1	Commissioning of the FLASH2 Electron Beam Diagnostics in Respect to its use at the European XFEL	electronics, undulator, electron, vacuum	712
	N. Baboi, D. Nölle DESY, Hamburg, Germany
	This report presents the first operation experience of the electron beam diagnostics at FLASH2. FLASH2 is a new undulator line at the FLASH linac at DESY. Most electron beam diagnostics installed, like the beam loss monitors, cavity beam position monitors, toroids, beam halo monitors, have been designed for the European XFEL, and will provide operational experience beforehand. A few systems, as for example the button beam position monitors and the ionization chambers, have been developed for FLASH. The controls use the new MTCA.4 standard. Both linacs, FLASH and the European XFEL, require similar performance of the diagnostics systems. Many beam parameters are similar: bunch charge of 0.1 to 1 nC, pulse repetition frequency of 10 Hz, while others will be more critical at the XFEL than the ones currently used at FLASH, like the bunch frequency of up to 4.5 MHz. versus 1 MHz. The commissioning of FLASH2 and its diagnostics is ongoing. The beam monitors have accompanied the first beam through the linac, fine tuning for some systems is still to be done. The achieved performance will be presented in view of their use at the European XFEL.
	Slides THIXB1 [3.875 MB]
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Paper

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Other Keywords

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MOIXB1

Welcome to the 2014 International Beam Instrumentation Conference

instrumentation, beam-diagnostic

1

S.R. Smith
SLAC, Menlo Park, California, USA

The chairperson welcomes participants to Monterey for the 3rd IBIC and opens the conference.

Slides MOIXB1 [1.462 MB]

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MOIZB1

NSLS2 Diagnostic Systems Commissioning and Measurements

storage-ring, booster, injection, electronics

16

W.X. Cheng, B. Bacha, K. Ha, Y. Hu, M.A. Maggipinto, J. Mead, D. Padrazo, O. Singh, H. Xu
BNL, Upton, Long Island, New York, USA

As the newest and most advanced third generation light source, NSLS2 commissioning has started recently. A total of 50mA stored beam was achieved in the storage ring. Most of the diagnostic systems have been commissioned with beams and proved to be critical to the success of machine commissioning. This paper will present beam commissioning results of various diagnostic systems in the NSLS2 injector and storage ring, including profile monitors, current monitors, and position monitors. We will discuss some preliminary machine measurements as well, such as beam current and lifetime, tune, beam stability, filling pattern etc.

Slides MOIZB1 [6.187 MB]

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MOPF19

Design of a Profile Monitor with 12 Inches of Actuation for FRIB

alignment, interface, vacuum, feedback

97

S. Rodriguez Esparza, G. Kiupel, I.N. Nesterenko
FRIB, East Lansing, Michigan, USA

Funding: FACILITY FOR RARE ISOTOPE BEAMS
Actuated diagnostics present additional challenges that static diagnostics devices do not such as alignment, stability, and incorporating an appropriate drive mechanism. These challenges become even more apparent as the actuaded length increases. At the Facility for Rare Isotope Beams (FRIB) we plan on using a number of actuated diagnostics devices including a Profile Monitor (AKA: Wire Scanner) with 12 inches of actuation. The Profile Monitor uses tungsten wires to traverse the beam pipe aperture to measure the beam intensity with respect to it’s location in the X-Y plane. This paper will detail the design of the 12 inch Profile Monitor and how it is able to overcome the stability, alignment, and drive issues that come with the 12 inches of actuation.

Poster MOPF19 [1.128 MB]

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MOPF20

Diagnosing NSLS-II: A New Advanced Synchrotron Light Source

storage-ring, controls, booster, linac

100

Y. Hu, L.R. Dalesio, O. Singh, H. Xu
BNL, Upton, Long Island, New York, USA

NSLS-II, the successor to NSLS (National Synchrotron Light Source) at Brookhaven National Lab, is scheduled to be open to users worldwide by 2015 as a world-class advanced synchrotron light source because of its unique features: its half-mile-circumference (792 m) Storage Ring provides the highest beam intensity (500 mA) at medium-energy (3 GeV) with sub-nm-rad horizontal emittance (down to 0.5 nm -rad) and diffraction-limited vertical emittance at a wavelength of 1 Å (<8 pm-rad). As the eyes of NSLS-II accelerators to observe fascinating particle beams, beam diagnostics and controls systems are designed to monitor and diagnose the electron beam quality so that NSLS-II could be tuned up to reach its highest performance. The design and implementation of NSLS-II diagnostics and controls are described. Preliminary commissioning results of NSLS-II accelerators, including Linac, Booster, and Storage Ring, are presented.

Poster MOPF20 [1.105 MB]

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MOPD05

Dual Transverse and Longitudinal Streak Camera Imaging at ELSA

damping, cavity, synchrotron, electron

144

M.T. Switka, F. Frommberger, P. Hänisch, W. Hillert, M. Schedler
ELSA, Bonn, Germany

Funding: Funded by the German Research Foundation (DFG) within Colaborative Research Center (SFB/TRR) 16
The electron pulse stretcher ring ELSA located at Bonn University provides 0.5 – 3.5 GeV polarized and non-polarized electron beams for external experimental stations. A streak camera system has been installed to capture time resolved images of beam dynamics ranging from nanoseconds to several milliseconds. Particular attention was drawn to the capability of simultaneous imaging of both transverse beam dimensions, hence providing information of all spatial dimensions in one synchroscan or slow sweep measurement. Incoherent and coherent beam instabilities, especially at high stored beam currents, are subject of analysis due to the planned intensity upgrade towards 200 mA for standard operation. The current resolution performance of the imaging system and machine relevant measurements are presented.

Poster MOPD05 [6.133 MB]

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MOPD06

Electron Beam Diagnostics for Short Pulse FEL Schemes at CLARA

electron, laser, FEL, simulation

147

S. Spampinati, D. Newton
Cockcroft Institute, Warrington, Cheshire, United Kingdom
D. Newton
The University of Liverpool, Liverpool, United Kingdom

CLARA (Compact Linear Accelerator for Research and Applications) [1] is a proposed 250 MeV, 100-400 nm FEL test facility at Daresbury Laboratory. The purpose of CLARA is to test and validate new FEL schemes in areas such as ultra-short pulse generation, temporal coherence and pulse-tailoring. Some of the schemes that can be tested at CLARA depend on a manipulation of the electron beam properties with characteristic scales shorter than the electron beam and require a 30 - 50 μm modulation of the beam energy acquired via the interaction with an infrared laser beam in a short undulator. In this article we describe the electron beam diagnostics required to carry on these experiments.

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MOPD08

A Double-Prism Spectrometer for the Longitudinal Diagnosis of Femtosecond Electron Bunches with Mid-Infrared Transition Radiation

radiation, electron, detector, FEL

157

S. Wunderlich, E. Hass, B. Schmidt, M. Yan
DESY, Hamburg, Germany

Funding: The project has been supported by the BMBF under contract 05K10GU2 & FS FLASH 301.
Electron bunch lengths in the sub-10 fs regime and charges of a few tens of picocoulombs are parameters required for free-electron lasers [*] and are also a consequence from the intrinsic process in laser-driven plasma wake field acceleration [**]. Since the coherent spectrum of transition radiation of these bunches carries the information on the longitudinal bunch profile in the form factor, the spectroscopy of transition radiation is an attractive method to determine the electron bunch length. A double-prism spectrometer has been developed and demonstrated for the single-stage measurement of mid-infrared transition radiation between 2 μm and 18 μm. The spectrometer facilitates single-shot spectral measurements with high signal-to-noise ratio utilising a line array of mercury cadmium telluride detectors. In this contribution, we present the spectrometer and measurements of electron bunches of the Free-Electron Laser in Hamburg (FLASH) at DESY. The results are compared to established bunch length monitors which are a multi-stage grating spectrometer for transition radiation and a transverse deflecting structure accessing the longitudinal phase space of the electron bunches directly.
*J. Rönsch-Schulenburg et al., Proceedings of FEL 2014, TUB04 (2014), to be published
**O. Lundh et al., Nature Physics 7, 219–222 (2011)

Poster MOPD08 [1.346 MB]

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MOPD10

New Results Of FERMI FEL1 EOS Diagnostics With Full Optical Synchronization

laser, FEL, electron, electronics

165

M. Veronese, E. Allaria, P. Cinquegrana, E. Ferrari, F. Rossi, P. Sigalotti, C. Spezzani
Elettra-Sincrotrone Trieste S.C.p.A., Basovizza, Italy
E. Ferrari
Università degli Studi di Trieste, Trieste, Italy

The Electro Optical Sampling diagnostics (EOS) of the FERMI FEL has been recently upgraded with a full optical synchronization of its dedicated femtosecond fiber laser to the ultra-stable optical pulsed timing system of FERMI. For this purpose a dual synchronization electronics has been developed and installed. It exploits a mixed error signal derived from both optical to electrical conversion and from a second harmonic generation based optical phase detection. For this second part a new optical setup including a cross correlator has been installed. The operation of the EOS has greatly benefited from the upgrade. The arrival time measurements have been compared with the ones from the bunch arrival monitor diagnostics (BAM) showing very good agreement. This new setup has also allowed to improve the bunch profile measurement. Some examples of measurement with ZnTe and GaP are presented. Finally, usability and operator friendliness of the new setup are also discussed.

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MOPD15

CW Beam Stability Analysis in Time and Frequency Domain

electron, high-voltage, radiation, laser

179

M. Kuntzsch, M. Gensch, B.W. Green, S. Kovalev, U. Lehnert, P. Michel, R. Schurig, J. Teichert
HZDR, Dresden, Germany

The superconducting quasi CW Linac ELBE has been characterized in terms of energy and timing stability. The measurement results presented show a combination of a laser-based bunch arrival-time measurements (BAM), a fast beam position monitor (BPM) readout with single bunch resolution and a compression monitor (BCM) based on a fast pyro-electric detector. By changing the bunch compression factor a separation and identification of jitter sources has been achieved. The quasi CW mode of operation enables frequency domain data analysis with high dynamic range, which gives a better understanding of the main sources of jitter. Experimental results for both injectors (thermionic DC, superconducting RF) are presented.

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MOPD26

A Bunch Extension Monitor for the Spiral2 LINAC

linac, ion, detector, photon

212

J.L. Vignet, R.V. Revenko
GANIL, Caen, France

Measurements of the longitudinal shape of bunched beam particles are crucial for optimization and control of LINAC beam parameters and maximization of its integrated luminosity. The non-interceptive bunch extension monitor for the LINAC at the SPIRAL2 facility is being developed at GANIL. Five bunch extension monitors will be installed at the beginning of the LINAC between superconducting cavities. The principle of operation is based on the registration of x-rays induced by ions of accelerator beam interacting with a thin tungsten wire positioned on the beam path. The monitor consists of two parts: a system for wire insertion and positioning, and an x-ray detector based on microchannel plates (MCPs). A detector prototype has been developed over the past three years and was tested using both protons and heavy ions beams.

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TUIZB1

Radiation Sources and Their Application for Beam Profile Diagnostics

radiation, photon, electron, optics

263

G. Kube
DESY, Hamburg, Germany

Radiation generated by high-energy particle beams is widely used for beam diagnostic purposes. Depending on the mechanism of radiation generation, the emitted wavelength range extends from the THz up to the X-ray region, thus allowing the measurement of beam profiles in the longitudinal and the transverse plane over a wide range. In this talk, basic considerations for radiation based profile measurements will be discussed with special emphasis on the mechanism of radiation generation and the impact on beam diagnostic measurements.

Slides TUIZB1 [4.803 MB]

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TUCZB1

Novel Emittance Diagnostics for Diffraction Limited Light Sources Based on X-ray Fresnel Diffractometry

emittance, electron, radiation, betatron

274

M. Masaki, Y. Shimosaki, S. Takano, M. Takao
JASRI/SPring-8, Hyogo-ken, Japan

A novel emittance diagnostics technique with high sensitivity using X-ray Fresnel diffraction by a single slit has been developed to measure micron-order electron beam sizes at insertion devices (IDs) of photon beamlines. The X-ray Fresnel diffractometry (XFD)* is promising for diagnostics especially of a so-called diffraction limited storage ring (DLSR) with ultra-low emittance. In the DLSR, due to inevitable field errors of strong quadrupole and sextupole magnets, unwanted distortion of lattice functions and local betatron coupling will result in a different light source size at each beamline. Therefore, measurements of electron beam sizes at the ID source points will be essential to ensure the absence of degradation of brilliance and transverse coherence of radiation at the beamlines. The XFD observes a double-lobed diffraction pattern that emerges by optimizing the single slit width. The principle is based on a correlation between the depth of a median dip in the double-lobed pattern and the light source size at the ID. The validity of the new technique was theoretically and experimentally studied. The achievable resolution of the XFD will be also discussed.
* M. Masaki, et al.,"X-ray Fresnel Diffractometry for Ultra-Low Emittance Diagnostics of Next Generation Synchrotron Light Sources", submitted to Phys. Rev.ST-AB.

Slides TUCZB1 [5.456 MB]

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TUPF13

Diamond-Based Photon BPMs for Fast Electron-Beam Diagnostics in Synchrotron Radiation Sources

electron, photon, radiation, detector

342

M. Antonelli, G. Cautero, D. Giuressi, 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

Electron-beam stability is amongst the primary concerns in current Synchrotron Radiation (SR) sources; in particular, in third-generation SR facilities high-brightness beamlines using undulator radiation are extremely sensitive to electron-beam oscillations. Orbit stabilization has been intensively addressed in the past years and many SR machines have been equipped with a Fast Orbit Feedback (FOFB) based on electron Beam-Position Monitors (eBPMs). On the other hand, photon Beam-Position Monitors (pBPMs), besides providing beamline users with crucial calibration data, are also a useful tool for keeping the electron beam under control, by monitoring position and intensity of the delivered radiation. The machine control system can take advantage of this information in order to improve the stability of the electron-beam. A diagnostic beamline, utilizing a couple of fast pBPMs based on single-crystal CVD diamond detectors, has been built and inserted into the central dead-end outlet of one of Elettra’s bending-magnets. Tests have been carried out both during normal machine operations and by deliberately moving the orbit during dedicated shifts. Owing to the outstanding properties of diamond in terms of speed and radiation hardness, the results show how the aforementioned system allows the beam position to be monitored with sub-micrometric precision at the demanding readout rates required by the FOFB. The radiation hardness of the sensors allows the operation over extended periods of time without special maintenance. Therefore, this system is particularly suited for storage-ring sections lacking in electron-beam monitoring and the tested diagnostic line represents a demonstrator for future implementation of pBPMs at several bending-magnet front ends of Elettra.

Poster TUPF13 [3.409 MB]

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TUPF18

Development of a Button BPM for the LCLS-II project

wakefield, electron, feedback, HOM

361

A. Lunin, T.N. Khabiboulline, N. Solyak, V.P. Yakovlev
Fermilab, Batavia, Illinois, USA

A high sensitivity button BPM is under development for a linac section of the LCLS-II project. Since the LCLS-II linac will operate with bunch charge as low as 10 pC, we analyse various options for pickup button and feedthrough in order to maximize the BPM output signal at low charge regime. As a result the conceptual BPM design is proposed including an analytical estimation of the BPM performance as well as numerical simulation with CST Particle Studio and ANSYS HFSS. Both numerical methods show a good agreement of BPM output signals for various design parameters. Finally we describe the signal processing scheme and the electronics we are going to use.

Poster TUPF18 [0.846 MB]

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TUPD16

Development of the Transverse Beam Profile Monitors for the PAL-XFEL

electron, radiation, vacuum, target

452

I.Y. Kim, J.Y. Choi, H. Heo, H.-S. Kang, C. Kim, G. Mun, B.G. Oh, S.J. Park
PAL, Pohang, Kyungbuk, Republic of Korea

The PAL-XFEL is an X-ray free electron laser under construnction at the Pohang Accelerator Laboratory (PAL), Korea. In the PAL-XFEL, the electron beam can make coherent optical transition radiation (COTR) due to the microbunching instability in the compressed electron beam. In order to obtain transverse beam profiles without the COTR problem, we are developing scintillating screen monitors (with the geometric suppress method) and wire scanners. In this paper, we report test results at the test facility and progress in the development of the screen monitor and the wire scanner for the PAL-XFEL.

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WEIXB1

LCLS Beam Diagnostics

electron, undulator, cavity, laser

475

H. Loos
SLAC, Menlo Park, California, USA

Funding: Work supported by DOE contract DE-AC03-76SF00515
An extensive set of beam diagnostics has been one of the factors in the successful commissioning and operation of the Linac Coherent Light Source (LCLS) x-ray FEL over the last seven years. The originally developed and installed diagnostics were geared towards measuring the electron beam parameters of the LCLS design specifications. Since then, a number of improved and new diagnostics have been implemented to accommodate a much wider range of beam parameters and to overcome the challenges of diagnostics for a high brightness electron beam. Plans for the diagnostics of the LCLS-II project with its high repetition rate and high beam power and ongoing developments will also be discussed.

Slides WEIXB1 [4.408 MB]

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WECYB2

NSLS-II RF Beam Position Monitor Comissioning Update

timing, electronics, storage-ring, booster

500

J. Mead, A. Caracappa, W.X. Cheng, C. Danneil, J.H. De Long, A.J. Della Penna, K. Ha, B.N. Kosciuk, M.A. Maggipinto, D. Padrazo, B. Podobedov, O. Singh, Y. Tian, K. Vetter
BNL, Upton, Long Island, New York, USA

The National Synchrotron Light Source II (NSLS-II) is a third generation light source currently in the commissioning stage at Brookhaven National Laboratory. The project includes a highly optimized, ultra-low emittance, 3GeV electron storage ring, linac pre-injector and full energy booster synchrotron. Successful commissioning of the booster began in November 2012, followed by the ongoing commissioning of the NSLS-II 3GeV electron storage ring which began in March 2014. With those particles first injected, came a value realization of the in-house developed RF Beam Position Monitor (RF BPM). This in-house design knowledge proved to be extremely valuable to match BPM configurations and requirements quickly when needed with various injected beam conditions. The RF BPM system was envisioned and undertaken to meet or exceed the demanding applications of a third generation light source. This internal R&D project has since matured to become a fully realized diagnostic system with over 250 modules currently operational. Initial BPM performance and applications will be discussed.

Slides WECYB2 [3.041 MB]

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WEPF02

A Toroid Based Bunch Charge Monitor System with Machine Protection Features for FLASH and XFEL

timing, operation, controls, FPGA

521

M. Werner, T. Lensch, J. Lund-Nielsen, Re. Neumann, D. Nölle, N. Wentowski
DESY, Hamburg, Germany

For the superconducting linear accelerators FLASH and XFEL, a new toroid based charge measurement system has been designed as a standard diagnostic tool. It is also a sensor for the bunch charge stabilization feedback and for machine protection. The system is based on MTCA.4 technology and will offer a high dynamic range and high sensitivity. The machine protection features will cover recognition of poor transmission between adjacent toroid sensors, bunch pattern consistency checks, and protection of the beam dumps. The concept, an overview of the algorithms, and the implementation will be described. A summary of first operation experience at FLASH will be presented.

Poster WEPF02 [1.113 MB]

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WEPF07

Optimization of a Short Faraday Cup for Low-Energy Ions Using Numerical Simulations

electron, ion, simulation, linac

544

A.G. Sosa, E. Bravin, E.D. Cantero
CERN, Geneva, Switzerland
C.P. Welsch
Cockcroft Institute, Warrington, Cheshire, United Kingdom
C.P. Welsch
The University of Liverpool, Liverpool, United Kingdom

Funding: CATHI is a Marie Curie Initial Training Network funded by the European Commission under Grant Agreement Number PITN-GA-2010-264330.
ISOLDE, the heavy-ion facility at CERN is undergoing a major upgrade with the installation of a superconducting LINAC that will allow post-acceleration of ion beams up to 10 MeV/u. In this framework, customized beam diagnostics are being developed in order to fulfill the design requirements as well as to fit in the compact diagnostic boxes foreseen. The main detector of this system is a compact Faraday cup that will measure beam intensities in the range of 1 pA to 1 nA. In this contribution, simulation results of electrostatic fields and particle tracking are detailed for different Faraday cup prototypes taking into account the energy spectrum and angle of emission of the ion-induced secondary electrons.

Poster WEPF07 [1.282 MB]

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WEPF09

Introduction to the Test Result of Turbo-ICT in PAL-ITF

monitoring, laser, electron, pick-up

553

H. J. Choi, M.S. Chae, H.-S. Kang, S.J. Park
PAL, Pohang, Kyungbuk, Republic of Korea

Pohang Accelerator Laboratory (PAL) built a PAL-ITF (Injector Test Facility) at the end of 2012 to successfully complete PAL-XFEL (X-ray Free Electron Laser) in 2015. The PAL-ITF is equipped with various kinds of diagnostic equipment to produce high-quality electron bunches. The three main parameters that an injection testing facility should measure are charge, energy and emittance. Although ICT and Faraday Cup were installed to measure beam charge, the noise generated in a klystron modulator not only interrupted accurate measurement but prevented low charges under tens of pC from being measured. Due to the changes in the overall voltage level of ITF, integration of ICT measured value failed to maintain perfect accuracy in terms of methodology (measured value continuously changed by ± 5pC). Accordingly, to solve the noise problems and accurately measure the quantity of electron beam charge, Turbo-ICT was installed. This paper focuses on the processes and test result of electric bunch charge quantity measurements using Turbo-ICT.

Poster WEPF09 [2.807 MB]

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WEPF12

A Diagnostics of Ion Beam from 28 GHz Electron Cyclotron Resonance Ion Source

ion, ECR, ion-source, emittance

561

J.W. Ok, S. Choi, J.G. Hong, S.J. Kim, B.S. Lee, J.Y. Park, C.S. Shin, M. Won, J.H. Yoon
Korea Basic Science Institute, Busan, Republic of Korea
J. Bahng
Kyungpook National University, Daegu, Republic of Korea

A neutron radiography facility utilizing a 28 GHz superconducting electron cyclotron resonance (ECR) ion source and a heavy ion accelerator is now under construction at Korea Basic Science Institute (KSBI). In order to generate a proper energy distribution of neutron, a lithium ion beam is considered. It will be accelerated up to the energy of 2.7 MeV/u by using a radio frequency quadrupole (RFQ) and drift tube linear (DTL) accelerator. The 28 GHz superconducting ECR ion source, which is the state of the art of an ion injector, has been built to produce the lithium ion beam. The ion beam of 12 keV/u would be extracted to low energy beam transport (LEBT) system, which is comprised of several types of electromagnets to focus and deliver the beam, effectively. After transporting an ion beam through LEBT, RFQ once accelerates the ion beam from 12 to 500 keV/u. Finally, we can achieve the final beam energy at the DTL. Before the ion beam is delivered to accelerator, the requirements should be satisfied to confirm the status of beam. For this, we developed the instruments in the diagnostic chamber in the middle of LEBT system to observe the beam dynamics. An analyzing electromagnet, slits, wire scanners and faraday cup will be used to perform a diagnosis of ion beam characteristics. We will present and discuss the experimental results of ion beam profile and the current after selecting a required charge state.

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WEPF13

The Status of Beam Diagnostics for the Hie-Isolde Linac at Cern

emittance, detector, TRIUMF, simulation

565

E.D. Cantero, W. Andreazza, E. Bravin, A.G. Sosa
CERN, Geneva, Switzerland
A.G. Sosa
Cockcroft Institute, Warrington, Cheshire, United Kingdom
A.G. Sosa
The University of Liverpool, Liverpool, United Kingdom

Funding: CATHI is a Marie Curie Initial Training Network funded by the European Commission under Grant Agreement Number PITN-GA-2010-264330.
The HIE-ISOLDE project aims at upgrading the CERN ISOLDE radioactive ion beam facility for higher beam intensities and higher beam energies. New beam diagnostic devices have to be developed as part of this upgrade, in particular for the measurement of intensity, energy, transverse and longitudinal profiles, and transverse emittance. The beam energy ranges from 300 keV/u to 10 MeV/u and beam intensities are between 1 pA and 1 nA. Faraday cups will be used for the measurement of the beam intensity while silicon detectors will be used for the energy and longitudinal profile measurements. The transverse profiles will be measured by moving a V-shaped slit in front of a Faraday cup and the beam position will be calculated from the profiles. The transverse emittance can be measured using the existing REX-ISOLDE slit and grid system, or by the combined use of two scanning slits and a Faraday cup. The final design of the mentioned devices will be presented in this contribution, including the results of the experimental validation tests performed on prototypes during the last two years.

Poster WEPF13 [4.263 MB]

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WEPF15

Status of the Standard Diagnostic Systems of the European XFEL

cavity, electronics, undulator, gun

569

D. Nölle
DESY, Hamburg, Germany

The European XFEL, an X-ray free-electron-laser user facility based on a 17.5 GeV superconducting LINAC, is currently under construction close to the DESY site at Hamburg. DESY is in charge of the construction of the accelerator. This contribution will report the status of the standard diagnostic systems of this facility. The design phase has finished for all main systems; most of the components are in production or are already produced. This paper will show details of the main systems, their installation issues and will report on the further time schedule. Furthermore, the experience from the commissioning of the RF gun with beam will be reported.

Poster WEPF15 [5.427 MB]

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WEPF17

Error Analysis for Pepperpot Emittance Measurements Redux: Correlated Phase Spaces

emittance, background, target, ion

579

S.M. Lidia
FRIB, East Lansing, Michigan, USA
K. Murphy
LBNL, Berkeley, California, USA

Funding: This work was supported by the Director, Office of Science, Office of Fusion Energy Sciences, of the U.S. Department of Energy under Contract No. DE-AC02-05CH11231.
Recently, Jolly et al. presented an analysis of the rms emittance measurement errors from a first principles approach [1]. Their approach demonstrated the propagation of errors in the single-plane rms emittance determination from several instrument and beam related sources. We have extended the analysis of error propagation and estimation to the fully correlated 4-D phase space emittances obtained from pepperpot measurements. We present the calculation of the variances using a Cholesky decomposition approach. Pepperpot data from recent experiments on the NDCX-II beamline are described, and estimates of the emittances and measurement errors for the 4-D as well as the projected rms emittances in this coupled system are presented.
[1] S. Jolly, et al., “Data Acquisition and Error Analysis for Pepperpot Emittance Measurements”, Proceedings of DIPAC ’09, WEOA03.

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WEPF28

Failure Mode and Effects Analysis of the Beam Intensity Control for the SPIRAL2 Accelerator

controls, linac, proton, ion

613

C. Jamet, T.A. Andre, B. Ducoudret, G. Ledu, S.L. Leloir, S. Loret, C. Potier de courcy
GANIL, Caen, France

The first phase of the SPIRAL2 project includes a driver and its associated new experimental areas (S3 and NFS caves). The accelerator, located in Caen (France), is based on a linear solution composed of a normal conducting RFQ and a superconducting linac. Intense primary stable beams (deuterons, protons, light and heavy ions) will be accelerated at various energies for nuclear physics. The beam intensity monitoring is a part of the operating range control of the facility. A high level of requirements is imposed on the intensity control system. In 2013, a failure mode and effects analysis (FMEA) was performed by a specialized company helped by the GANIL’s Electronic group. This paper presents the analysis and evolutions of the electronic chain of measurement and control.

Poster WEPF28 [1.130 MB]

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THIXB1

Commissioning of the FLASH2 Electron Beam Diagnostics in Respect to its use at the European XFEL

electronics, undulator, electron, vacuum

712

N. Baboi, D. Nölle
DESY, Hamburg, Germany

This report presents the first operation experience of the electron beam diagnostics at FLASH2. FLASH2 is a new undulator line at the FLASH linac at DESY. Most electron beam diagnostics installed, like the beam loss monitors, cavity beam position monitors, toroids, beam halo monitors, have been designed for the European XFEL, and will provide operational experience beforehand. A few systems, as for example the button beam position monitors and the ionization chambers, have been developed for FLASH. The controls use the new MTCA.4 standard. Both linacs, FLASH and the European XFEL, require similar performance of the diagnostics systems. Many beam parameters are similar: bunch charge of 0.1 to 1 nC, pulse repetition frequency of 10 Hz, while others will be more critical at the XFEL than the ones currently used at FLASH, like the bunch frequency of up to 4.5 MHz. versus 1 MHz. The commissioning of FLASH2 and its diagnostics is ongoing. The beam monitors have accompanied the first beam through the linac, fine tuning for some systems is still to be done. The achieved performance will be presented in view of their use at the European XFEL.

Slides THIXB1 [3.875 MB]

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