Keyword: diagnostics
Paper Title Other Keywords Page
MOPMB009 Electron Beam Probe for the Bunch Length Measurements at BERLinPro electron, simulation, gun, operation 92
 
  • D. Malyutin, A.N. Matveenko
    HZB, Berlin, Germany
  
  For the successful operation of various accelerator facilities a detailed bunch characterization is required. A complete description can be achieved using various diagnostic systems installed along an accelerator beamline. Ideally the diagnostic should be able to measure parameters of a single bunch in a non-destructive manner. For bunch length measurements this results in a complicated task especially for bunch duration below 1 ps. One of the possible solutions is a diagnostic based on the interaction of a low energy electron beam with electro-magnetic fields of the relativistic bunch. The bunch length can be readily deduced from the resulting scatter. In this paper bunch length measurement technique based on a low energy electron beam is introduced. Results of numerical simulations of measurements are presented. A possible setup of such diagnostic system for BERLinPro facility is proposed.  
DOI • reference for this paper ※ DOI:10.18429/JACoW-IPAC2016-MOPMB009  
Export • reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)  
 
MOPMB022 Conceptual Design for SR Monitor in the FCC Beam Emittance (Size) Diagnostic extraction, emittance, vacuum, brightness 133
 
  • T.M. Mitsuhashi, K. Oide
    KEK, Ibaraki, Japan
  • F. Zimmermann
    CERN, Geneva, Switzerland
  
  A conceptual design for emittance diagnostics through a beam size measurement using the synchrotron radiation (SR) is studied for the FCC. For the FCC-ee, a X-ray interferometer is propose to measure a nano-radian order vertical beam size. Also conceptual design of SR monitor is studied for FCC-hh. In the FCC-hh, visible SR will emitted from bending magnet in the energy range from the injection (3TeV) to top energy (50TeV). Hard X-ray SR will only available in the energy upper than 30TeV. The various instrumentations using the visible SR is usable for all energy range. Around the top energy, the X-ray pinhole camera will convenient for beam diagnostics of emittance through the beam size measurement.  
DOI • reference for this paper ※ DOI:10.18429/JACoW-IPAC2016-MOPMB022  
Export • reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)  
 
MOPMB028 Development of Beam Diagnostic System for the SPring-8 Upgrade radiation, beam-diagnostic, photon, emittance 149
 
  • H. Maesaka, T. Ohshima, Y. Otake
    RIKEN SPring-8 Center, Sayo-cho, Sayo-gun, Hyogo, Japan
  • H. Dewa, T. Fujita, K. Kobayashi, M. Masaki, S. Matsubara, T. Nakamura, S. Sasaki, S. Takano
    JASRI/SPring-8, Hyogo-ken, Japan
  
  The goal of the beam diagnostic system for the SPring-8 upgrade is to deliver brilliant X-rays enabled by the new low-emittance ring to experimental stations with ultimate stability. Developments of accurate electron and photon beam position monitors (EBPM and XBPM, respectively) with both short and long-term stability are the most critical. The EBPM sensitivity is also crucial for low-current beam commissioning to accomplish the first beam storage in the ring. We designed a button electrode to obtain sufficiently high-intensity signals while suppressing high-Q trapped modes leading to impedance and heating issues. We also designed a precise EBPM block and a rigid support to achieve mechanical accuracy and stability. Another challenge is the development of a reliable and stable XBPM, which should be an accurate reference for an orbit feedback without any photon-energy dependences. A significant improvement of a blade-type XBPM or an invention of a novel XBPM detecting the core of an intense X-ray beam are necessary. The other diagnostic instrumentations can be utilized for the new ring with minor improvements.  
DOI • reference for this paper ※ DOI:10.18429/JACoW-IPAC2016-MOPMB028  
Export • reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)  
 
MOPMB036 Beam Profile Measurement Using Kirkpatrick Baez Mirror Optics at Shanghai Synchrotron Radiation Facility synchrotron, radiation, synchrotron-radiation, optics 167
 
  • D.C. Zhu, J.S. Cao, Y.F. Sui, J.H. Yue
    IHEP, Beijing, People's Republic of China
  • J. Chen
    SINAP, Shanghai, People's Republic of China
  
  For the third-generation light sources, the vertical emit-tance of a few pico-meter-radians which can be achieved with good coupling correction close to 0.1%, will lead to very small beam size. Several microns vertical beam sizes measurement has presented challenges for diagnostic capability in this region. A few techniques have been developed to make a precise measurement, such as visible light interferometer, x-ray imaging using Fresnel zone plates, compound refractive lenses or pinhole camera. In this paper, an x-ray reflective optics method based on the Kirkpatrick'Baez mirrors will be emphasis on discussed. The K-B mirror system will be installed and tested in SSRF to obtain the vertical beam size close to 20 microns, which is expected to be used for several microns vertical beam size measurement in the future light source named HEPS (High Energy Photon Source) in China.  
DOI • reference for this paper ※ DOI:10.18429/JACoW-IPAC2016-MOPMB036  
Export • reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)  
 
MOPMB040 Design of the Beam Diagnostics System for a New IR-FEL Facility at NSRL FEL, laser, cavity, emittance 181
 
  • J.H. Wei, X.Y. Liu, P. Lu, B.G. Sun, L.L. Tang, F.F. Wu, Y.L. Yang, T.Y. Zhou, Z.R. Zhou
    USTC/NSRL, Hefei, Anhui, People's Republic of China
  
  Funding: Work supported by National Natural Science Foundation of China (21327901, 11105141, 11575181)
A new IR-FEL has been commissioned at NSRL. This facility provides a final electron energy from 20 to 70 MeV, beam bunch with a macro-pulse length of 5~10 μs and a general micro-pulse repetition rate of 238 MHz, pulsed radiation with up to 100 mJ at about 0.3%~3% FWHM bandwidth. So a diagnostics system is necessary to monitor the performance of the bunch and the character of the FEL radiation, such as the beam position and profile, emittance, energy spread, laser intensity, etc. The beam diagnostics system mainly consists of Flags, a diagnostics beam line, BPMs, pop-in monitors and a FEL monitor system. This paper introduces the construction of this diagnostics system.
Corresponding author: ylyang@ustc.edu.cn 		 
DOI • reference for this paper ※ DOI:10.18429/JACoW-IPAC2016-MOPMB040  
Export • reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)  
 
MOPMR014 Beam Diagnostics Overview for Collector Ring at FAIR ion, antiproton, injection, pick-up 255
 
  • Yu. A. Rogovsky, E.A. Bekhtenev, M.I. Bryzgunov, O.I. Meshkov, D.B. Shwartz
    BINP SB RAS, Novosibirsk, Russia
  • E.A. Bekhtenev, Yu. A. Rogovsky, D.B. Shwartz
    NSU, Novosibirsk, Russia
  • O. Chorniy
    GSI, Darmstadt, Germany
  
  The Collector Ring (CR) is a dedicated storage ring in the FAIR project, where the main emphasis is laid on the effective stochastic precooling of intense secondary beams of stable ions, rare isotopes or antiprotons. A complex operation scheme with several types of operational cycles with beams in CR starting from injection, RF gymnastics, stochastic cooling then, and finishing to extraction is foreseen. Beam parameters changes significantly during the cycles. This demands an exceptional high dynamic range for the beam instrumentation. Non-destructive methods are mandatory for high currents as well as for the low current secondary beams due to the low repetition rate. Precise measurements of all beam parameters and automatic steering with short response time are required due to the necessary exploitation of the full ring acceptances. An overview of the challenges and solutions for various diagnostic installations will be given.  
DOI • reference for this paper ※ DOI:10.18429/JACoW-IPAC2016-MOPMR014  
Export • reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)  
 
MOPMR016 A New Approach for the Electron Beam Diagnostic Using Diffraction Radiation Disphase Target target, radiation, detector, simulation 261
 
  • D.A. Shkitov, G.A. Naumenko, A. Potylitsyn
    TPU, Tomsk, Russia
  • J. Urakawa
    KEK, Ibaraki, Japan
  
  Funding: The work was partially supported by the RFBR grant No 15-52-50028.
Since 1995, when the diffraction radiation (DR) from relativistic particles was first observed*, the development of new approaches using the DR for charged particle beam diagnostics is continued. The DR appears when charged particle moves close to the media and the electromagnetic field interacts with it. A rather well-known non-invasive diagnostic method of transversal bunch size is to use a slit target**. In paper*** the optical DR from disphase target was proposed to use for non-invasive diagnostics of high energy electron beam. Disphase target consists of the two rectangular flat plates inclined with respect to each other at an angle compared with 1/g, where g is the Lorentz-factor. Recently the feasibility of the disphase target usage for the 6 MeV electron beam size diagnostics was investigated****. In this report we present the further research of the disphase target beam diagnostics. The simulations of the spectral-angular DR characteristics from this target and it application for diagnostics aim are shown. These calculations confirm an applicability of this technique for micron size beam measurements for the case of g>1000.
*Y. Shibata et al. //PRE 52, 6787 (1995)
**P. Karataev et al. //PRL 93, 244802 (2004)
***G. Naumenko et al. //Proc. of PAC TOAD004, 404 (2005)
****E.V. Kornoukhova et al. //JPCS, in press (2016) 		 
DOI • reference for this paper ※ DOI:10.18429/JACoW-IPAC2016-MOPMR016  
Export • reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)  
 
MOPMR020 Beam Diagnostics for ESS Commissioning and Early Operation linac, target, DTL, optics 273
 
  • A. Jansson, M. Eshraqi, S. Molloy
    ESS, Lund, Sweden
  
  The ESS linac design has evolved over time and is now quite stable. Recently, there has been a focused effort on developing more detailed installation and commissioning plan, and related to this, the plans for diagnostics has also been reviewed. This paper presents the updated diagnos-tics suite. Many of diagnostics systems will be developed by in-kind partners across Europe.  
DOI • reference for this paper ※ DOI:10.18429/JACoW-IPAC2016-MOPMR020  
Export • reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)  
 
MOPMR030 Performance of the Upgraded Synchrotron Radiation Diagnostics at the LHC radiation, extraction, synchrotron, synchrotron-radiation 306
 
  • G. Trad, E. Bravin, A. Goldblatt, S. Mazzoni, F. Roncarolo
    CERN, Geneva, Switzerland
  • T.M. Mitsuhashi
    KEK, Ibaraki, Japan
  
  During the LHC long shut down in 2014, the transverse beam size diagnostics based on synchrotron radiation was upgraded in order to cope with the increase of the LHC beam energy to 6.5 TeV. The wavelength used for imaging was shifted to near ultra-violet to reduce the contribution of diffraction to the system resolution, while in parallel, a new diagnostic system based on double slit interferometry was installed to measure the beam size by studying the spatial coherence of the emitted synchrotron radiation. This method has never been implemented before in a proton machine. A Hartmann mask was also installed to identify possible wavefront distortions that could affect the system accuracy. This paper will focus on the comparison of visible and the near ultra-violet imaging and on the first experience with interferometry.  
DOI • reference for this paper ※ DOI:10.18429/JACoW-IPAC2016-MOPMR030  
Export • reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)  
 
MOPMR043 Optical System Design for The ESS Proton Beam and Target Diagnostics target, optics, proton, radiation 347
 
  • M.G. Ibison, C.P. Welsch
    Cockcroft Institute, Warrington, Cheshire, United Kingdom
  • E. Adli, H. Gjersdal
    University of Oslo, Oslo, Norway
  • M.G. Ibison, C.P. Welsch
    The University of Liverpool, Liverpool, United Kingdom
  • T.J. Shea, C.A. Thomas, N. de la Cour
    ESS, Lund, Sweden
  
  Funding: Science and Technology Facilities Council
The high power and low emittance of the European Spallation Source (ESS) proton beam require a robust protection strategy for the spallation target and its surroundings. For this, the beam will be imaged on passing through scintillator screens coating both the proton beam window (PBW) on exit from the accelerator, and the entry window to the target (TW). Light from the screens must be transported to remote cameras through a 4m high shielding plug of limited aperture. At the same time, the optical path must not compromise the integrity of the shield against neutrons and interaction products. We present the theory underlying the design of the reflective optics for efficient transmission of high-quality images to provide the desired level of protection to the machine, and describe its implementation in the Zemax software tool, as well as the predicted imaging performance. We also consider how the requirements of environment (thermal and radiation), initial alignment and ongoing maintenance for the optical system will be met. Finally we comment on the applicability of optics of this type for diagnostic systems in similar situations at other neutron sources and elsewhere. 		 
DOI • reference for this paper ※ DOI:10.18429/JACoW-IPAC2016-MOPMR043  
Export • reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)  
 
MOPMR044 Optimization of Particle Accelerators (oPAC) simulation, controls, network, synchrotron 350
 
  • C.P. Welsch
    Cockcroft Institute, Warrington, Cheshire, United Kingdom
  • C.P. Welsch
    The University of Liverpool, Liverpool, United Kingdom
  
  Funding: This project has received funding from the European Union's Seventh Framework Programme for research, technological development and demonstration under grant agreement no 289485.
The optimization of the performance of any particle accelerator critically depends on an in-depth understanding of the beam dynamics, powerful simulation tools and beam diagnostics, as well as a control and data acquisition system that links all the above. The oPAC consortium has carried out collaborative research into these areas, with the aim to optimize the performance of present and future accelerators that lie at the heart of many research infrastructures. The network brought together research centers, universities, and industry partners to jointly train 23 researchers in this interdisciplinary field. This contribution presents selected research highlights from the network's scientific work packages: results from beam dynamics simulations into upgrade scenarios for the LHC and the 3rd generation light sources ALBA and SOLEIL; use of a cryogenic current comparator for low intensity ion beams; advanced beam loss monitors operating in cryogenic environments; and a laser-wire beam profile monitor for H− beams. Finally, it discusses how an open source control system based on a relational database using a dynamic library loader can help enhance overall facility operation. 		 
DOI • reference for this paper ※ DOI:10.18429/JACoW-IPAC2016-MOPMR044  
Export • reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)  
 
MOPMR046 Characterizing Supersonic Gas Jet-based Beam Profile Monitors ion, simulation, vacuum, electron 357
 
  • H.D. Zhang, A.S. Alexandrova, A. Jeff, V. Tzoganis, C.P. Welsch
    Cockcroft Institute, Warrington, Cheshire, United Kingdom
  • A.S. Alexandrova, A. Jeff, V. Tzoganis, C.P. Welsch, H.D. Zhang
    The University of Liverpool, Liverpool, United Kingdom
  • A. Jeff
    CERN, Geneva, Switzerland
  
  Funding: Work supported by EU under contracts 215080 and 289191, Helmholtz Association (VH-NG-328) and STFC under the Cockcroft Institute core grant ST/G008248/1.
The next generation of high power, high intensity accelerators requires non-invasive diagnostics, particularly beam profile monitors. Residual gas-based diagnostics such as ionization beam profile or beam induced fluorescence monitors have been used to replace commonly used scintillating screens. At the Cockcroft Institute an alternative technique using a supersonic gas jet, shaped into a 45o curtain screen, was developed. It has already demonstrated its superior performance in terms of resolution and signal-to-noise ratio in comparison with residual gas monitors in experimental studies. The performance of this type of monitor depends on the achievable jet homogeneity and quality. Using a movable vacuum gauge as a scanner, the dynamic characteristics of the jet are studied. In this paper we also give an analysis of the resolution for this monitor in detail from the theory and ion drift simulation. 		 
DOI • reference for this paper ※ DOI:10.18429/JACoW-IPAC2016-MOPMR046  
Export • reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)  
 
MOPOR026 Measurement of the Energy Distribution Function of Electrons Generated by Radio-frequency Induced Multipacting in a Beam Pipe electron, multipactoring, gun, radio-frequency 664
 
  • M. Van Gompel, F. Caspers, P. Costa Pinto, R. Leber, A. Romano, R. Salemme, M. Taborelli
    CERN, Geneva, Switzerland
  
  The development of Electron Multipacting (EM) in high intensity particle accelerators depends, amongst others, on the Secondary Electron Yield (SEY) of surfaces facing the beam. In-situ studies of electron clouds in particle accelerators must cope with operation schedule and other technical constrains. To overcome these difficulties, CERN implemented a Multipactor test bench, where EM is generated by Radio-Frequency (RF), using the beam pipes as a coaxial resonators. This tool was already successfully used to assess the effectiveness of low SEY carbon coatings on dipoles of the SPS at CERN and to study the conditioning dynamics of beam pipes. In this paper we present the development of an in-house built Retarding Field Energy Analyser (RFEA) to measure the Electrons Energy Distribution Function (EEDF) in the Multipactor test bench. The design of the electrodes was based on simulations in order to optimize sensitivity and energy resolution. The setup was tested with an electron gun at different energies before insertion in the Multipactor test bench. The evolution of the EEDF is measured at different RF powers. Feasibility to perform measurements in the machine is discussed.  
DOI • reference for this paper ※ DOI:10.18429/JACoW-IPAC2016-MOPOR026  
Export • reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)  
 
MOPOW046 RadiaBeam/SLAC Dechirper as a Passive Deflector wakefield, electron, lattice, focusing 817
 
  • A. Novokhatski, A. Brachmann, M. Dal Forno, V.A. Dolgashev, A.S. Fisher, M.W. Guetg, Z. Huang, R.H. Iverson, P. Krejcik, A.A. Lutman, T.J. Maxwell
    SLAC, Menlo Park, California, USA
  • J. Zemella
    DESY, Hamburg, Germany
  
  Funding: This work was supported by Department of Energy Contract No. DE-AC02-76SF00515.
We discuss the possibility of using the RadiBeam/SLAC dechirper recently installed at LCLS for measuring the bunch length of very short bunches, less than 1 fs perhaps as short as 100 atto second. When a bunch travels close to one of the jaws the particles of the bunch get a transverse kick depends upon the position of a particle in a bunch. The tail particles get more kick. The transverse force also gets a nonlinear dependence on the transverse position. The stretched bunch can be measured at the YAG screen that is 100 m downstream the dechirper. The most important aspect of this measurement is that that no synchronization is needed. The Green's function for the transverse kick was evaluated based on the precise wake field calculations of the dechirper corrugated structure*. Using this function we can restore the longitudinal shape of the bunch. This may also help to see if a bunch has any micro-bunch structure.
* A. Noovokhatski "Wakefield potentials of corrugated structures",Phys. Rev. ST Accel. Beams 18, 104402 (2015) 		 
DOI • reference for this paper ※ DOI:10.18429/JACoW-IPAC2016-MOPOW046  
Export • reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)  
 
MOPOY053 The SARAF-LINAC Project Status linac, cryomodule, rfq, status 971
 
  • N. Pichoff, N. Bazin, L. Boudjaoui, P. Brédy, D. Chirpaz-Cerbat, R. Cubizolles, B. Dalena, G. Ferrand, B. Gastineau, P. Gastinel, P. Girardot, F. Gougnaud, P. Hardy, M. Jacquemet, F. Leseigneur, C. Madec, N. Misiara, P.A.P. Nghiem, D. Uriot
    CEA/IRFU, Gif-sur-Yvette, France
  • P. Bertrand, M. Di Giacomo, R. Ferdinand, J.-M. Lagniel, J.F. Leyge, M. Michel
    GANIL, Caen, France
  
  SNRC and CEA collaborate to the upgrade of the SARAF accelerator to 5 mA CW 40 MeV deuteron and proton beams (Phase 2). CEA is in charge of the design, construction and commissioning of the superconducting linac (SARAF-LINAC Project). This paper presents to the accelerator community the status at March 2016 of the SARAF-LINAC Project.  
DOI • reference for this paper ※ DOI:10.18429/JACoW-IPAC2016-MOPOY053  
Export • reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)  
 
TUOBB03 CERN AWAKE Facility Readiness for First Beam proton, plasma, laser, electron 1071
 
  • C. Bracco, M. Bernardini, A.C. Butterworth, H. Damerau, S. Döbert, V. Fedosseev, E. Feldbaumer, E. Gschwendtner, W. Höfle, A. Pardons, E.N. Shaposhnikova, H. Vincke
    CERN, Geneva, Switzerland
  
  The AWAKE project at CERN was approved in August 2013 and since then a big effort was made to be able to probe the acceleration of electrons before the "2019-2020 Long Shutdown". The next steps in this challenging schedule will be a dry run of all the beam line systems, at the end of the HW commissioning in June 2016, and the first proton beam sent to the plasma cell one month later. The current status of the project is presented together with an outlook over the foreseen works for operation with electrons in 2018.  
slides icon Slides TUOBB03 [10.682 MB]  
DOI • reference for this paper ※ DOI:10.18429/JACoW-IPAC2016-TUOBB03  
Export • reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)  
 
TUPMR019 Measurements of the Beam Phase Response to Correcting Magnetic Fields in PSI Cyclotrons cyclotron, simulation, proton, operation 1271
 
  • A.S. Parfenova, C. Baumgarten, J.M. Humbel, A.C. Mezger
    PSI, Villigen PSI, Switzerland
  • A.V. Petrenko
    CERN, Geneva, Switzerland
  
  The cyclotron-based proton accelerator facility (HIPA) at PSI is presently operated at 1.3-1.4 MW beam power at a kinetic energy of 590 MeV/u to drive the neutron spallation source SINQ and for production of pion and muon beams. Over the years HIPA facility has developed towards increase of the delivered beam current and beam power (0.1 mA in 1974 till 2.2 mA in 2010). During the last few years several upgrades of the Ring cyclotron field correction and beam phase monitoring systems were made. RF voltage was also increased. In order to test the performance of the upgraded system the phase response measurements were carried out.  
DOI • reference for this paper ※ DOI:10.18429/JACoW-IPAC2016-TUPMR019  
Export • reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)  
 
TUPMR034 Development and Tests of Beam Test Facility with New Spare RFQ for Spallation Neutron Source rfq, ion, ion-source, neutron 1320
 
  • Y.W. Kang, A.V. Aleksandrov, M.S. Champion, M.T. Crofford, J. Moss, R.T. Roseberry, J.P. Schubert, M.P. Stockli, C.M. Stone, R.F. Welton, D.C. Williams, A.P. Zhukov
    ORNL, Oak Ridge, Tennessee, USA
  • B. Han, S.W. Lee, M.E. Middendorf, J. Price, R.B. Saethre
    ORNL RAD, Oak Ridge, Tennessee, USA
  
  Funding: This work was supported by SNS through UT-Battelle, LLC, under contract DE-AC05-00OR22725 for the U.S. DOE.
The Beam Test Facility (BTF) has been constructed to validate the performance of the new RFQ, to study ion source improvements, and to support neutron moderator development and six-dimensional phase space measure-ments for SNS. The BTF includes an H− ion source, Ra-dio-Frequency Quadrupole (RFQ), and Medium Energy Beam Transport (MEBT) beam diagnostics systems. A spare RFQ was built and fully RF tested in the BTF and will be installed in the SNS linac in the future. The test stand is ready to run with the H− ion beam through the new RFQ to fully validate the RFQ performance. The RFQ was designed to have the beam characteristics iden-tical to the existing RFQ with improved operational relia-bility and stability. The H− RF plasma ion source system includes new high power RF components for improved front-end system performance. 		 
DOI • reference for this paper ※ DOI:10.18429/JACoW-IPAC2016-TUPMR034  
Export • reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)  
 
TUPMY034 On Bunch Diagnostics with use of Surface Waves Generated on Planar Wire Grid radiation, vacuum, electronics, electromagnetic-fields 1623
 
  • V.V. Vorobev, S.N. Galyamin, A.V. Tyukhtin
    Saint-Petersburg State University, Saint-Petersburg, Russia
  
  Funding: Work is supported by the Grant of the President of Russian Federation (No. 6765.2015.2) and the Grants from Russian Foundation for Basic Research (No. 15-32-20985, 15-02-03913).
Periodic structures can be used for non-destructive diagnostics of charged particle bunches*. We consider structures which consist of thin conducting parallel wires. It is assumed that the structure period is much less than the typical wavelength under consideration. Therefore the influence of the structure on the electromagnetic field can be described with help of the averaged boundary conditions**. We consider radiation of bunches which move along the grid but transversely to wires. Unlike previous works the bunch is assumed to have essential transversal dimensions along with definite longitudinal charge distribution. In particular we analyze the effect of reflection of the surface wave from the structure edge. For all considered situations, analytical and numerical results demonstrate that analysis of the surface waves allows estimating the size and the shape of the bunch.
* A.V. Tyukhtin et al., Phys. Rev. ST AB 17, 122802 (2014); A.V. Tyukhtin et al., Phys. Rev. E 91, 063202 (2015).
** M.I. Kontorovich et al., Electrodynamics of Grid Structures (Moscow, 1987).
 
DOI • reference for this paper ※ DOI:10.18429/JACoW-IPAC2016-TUPMY034  
Export • reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)  
 
TUPOW005 Update on Third Harmonic XFEL Activities at INFN LASA cavity, HOM, operation, pick-up 1751
 
  • D. Sertore, M. Bertucci, A. Bignami, A. Bosotti, J.F. Chen, P. Michelato, L. Monaco, R. Paparella, P. Pierini
    INFN/LASA, Segrate (MI), Italy
  • C.G. Maiano
    DESY, Hamburg, Germany
  • C. Pagani
    Università degli Studi di Milano & INFN, Segrate, Italy
  
  After the successful installation and beam operation of the first batch of 3.9 GHz cavities into the XFEL Third Harmonic Injector Module, ten more cavities have been tested and delivered to DESY to be assembled into a spare cryomodule. In this paper, we report on the activities related to the cavities fabrication, treatment and vertical testing at INFN LASA.  
DOI • reference for this paper ※ DOI:10.18429/JACoW-IPAC2016-TUPOW005  
Export • reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)  
 
TUPOW055 Coronagraph Measurements on the Australian Synchrotron Storage Ring Optical Diagnostic Beamline synchrotron, background, extraction, photon 1895
 
  • M.J. Boland, Y.E. Tan
    SLSA, Clayton, Australia
  • T.M. Mitsuhashi
    KEK, Ibaraki, Japan
  
  A coronagraph was constructed on the Optical Diagnostic Beamline at the Australian Synchrotron to observe the tails of the stored beam and the injected beam on the first few turns. Some results are presented with special emphasis on the limitation of the dynamic range due to the quality of the synchrotron light extraction mirror.  
DOI • reference for this paper ※ DOI:10.18429/JACoW-IPAC2016-TUPOW055  
Export • reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)  
 
TUPOY026 Optimization of Medical Accelerators proton, ion, detector, network 1966
 
  • C.P. Welsch
    Cockcroft Institute, Warrington, Cheshire, United Kingdom
  • C.P. Welsch
    The University of Liverpool, Liverpool, United Kingdom
  
  Funding: This project has received funding from the European Union's Horizon 2020 research and innovation programme under the Marie Skłodowska-Curie grant agreement No 675265.
The Optimization of Medical Accelerators (OMA) is the aim of a new European Training Network. OMA joins universities, research centers and clinical facilities with industry partners to address the challenges in: treatment facility design and optimization; numerical simulations for the development of advanced treatment schemes; and beam imaging and treatment monitoring. Projects include: compact accelerators for proton beam energy boosting and gantry design; strategies for improving Monte Carlo codes for medical applications and treatment planning; and advanced diagnostics for online beam monitoring. The latter involves RF-based measurements of ultra-low charges and new encoding methodologies for ultra-fast 3D surface scanning. This contribution presents an overview of the network's research program and highlights the various challenges across the three scientific work packages. It also summarizes the network-wide training program consisting of schools, topical workshops and conferences that will be open to the wider medical and accelerator communities. 		 
DOI • reference for this paper ※ DOI:10.18429/JACoW-IPAC2016-TUPOY026  
Export • reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)  
 
WEOBA01 Beam Commissioning of the HIE-ISOLDE Post-Accelerator linac, detector, cryomodule, rfq 2045
 
  • J.A. Rodriguez, W. Andreazza, J.M. Bibby, N. Bidault, E. Bravin, J.C. Broere, E.D. Cantero, R. Catherall, V. Cobham, M. Elias, E. Fadakis, P. Fernier, M.A. Fraser, F. Gerigk, K. Hanke, Y. Kadi, M.L. Lozano Benito, E. Matli, S. Sadovich, E. Siesling, D. Valuch, W. Venturini Delsolaro, F.J.C. Wenander, P. Zhang
    CERN, Geneva, Switzerland
  
  Phase 1a of the High Intensity and Energy ISOLDE (HIE-ISOLDE) project* was completed in 2015. The first cryomodule and two High Energy Beam Transfer lines (HEBT) were installed. In addition, many of the subsystems of the normal conducting part of the post-accelerator (REX) were renovated or refurbished. Following the hardware commissioning of the different system** and, in preparation for the start of the physics program, many tests and measurements were conducted as part of the beam commissioning program. The results of these tests and the plan for the next beam commissioning campaign are discussed in this paper.
* Y. Kadi et al., "The HIE-ISOLDE Project", Journal of Physics: Conference Series 312.
** W. Venturini et al., "HIE-ISOLDE First Commissioning Experience", IPAC'16 		 
slides icon Slides WEOBA01 [1.437 MB]  
DOI • reference for this paper ※ DOI:10.18429/JACoW-IPAC2016-WEOBA01  
Export • reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)  
 
WEYB01 Diagnostic Systems of the PAL-XFEL target, electron, electronics, pick-up 2091
 
  • C. Kim, S.Y. Baek, H. J. Choi, J.H. Hong, H.-S. Kang, G. Kim, J.H. Kim, I.S. Ko, S.J. Lee, G. Mun, B.G. Oh, B.R. Park, D.C. Shin, H. Yang
    PAL, Pohang, Kyungbuk, Republic of Korea
  
  The Pohang Accelerator Laboratory (PAL) started an x-ray free electron laser project (PAL-XFEL) in 2011. The construction was finished at the end of 2015 and the commissioning is planned from the beginning of 2016. In the PAL-XFEL, an electron beam with 200 pC will be generated from a photocathode RF gun and will be accelerated to 10 GeV by using a linear accelerator. The electron beam will pass through undulator section to produce hard X-ray radiation. For the successful commissioning and beam operation, various kinds of instruments were prepared.  
slides icon Slides WEYB01 [11.770 MB]  
DOI • reference for this paper ※ DOI:10.18429/JACoW-IPAC2016-WEYB01  
Export • reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)  
 
WEPMY035 Preliminary Commissioning Results of the Proton Source for ESS at INFN-LNS plasma, proton, electron, vacuum 2628
 
  • L. Celona, L. Allegra, A. Amato, G. Calabrese, A.C. Caruso, G. Castro, F. Chines, G. Gallo, S. Gammino, O. Leonardi, A. Longhitano, G. Manno, S. Marletta, D. Mascali, A. Maugeri, M. Mazzaglia, L. Neri, S. Passarello, G. Pastore, A. Seminara, A.S. Spartà, G. Torrisi, S. Vinciguerra
    INFN/LNS, Catania, Italy
  • S. Di Martino, P. Nicotra
    Si.A.Tel SRL, Catania, Italy
  • A. Longhitano
    ALTEK, San Gregorio (CATANIA), Italy
  • G. Torrisi
    Universitá Mediterranea di Reggio Calabria, Reggio Calabria, Italy
  
  At Istituto Nazionale di Fisica Nucleare - Laboratori Nazionali del Sud (INFN-LNS) - the commissioning of the high intensity Proton Source for the European Spallation Source (PS-ESS) is under way. Preliminary results of plasma diagnostics collected on a testbench called "Flexible Plasma Trap" (FPT) will be correlated to the peculiarities of the magnetic system design and of the microwave injection setup with a view of the possible implications on the beam extraction system. The status of the costruction is presented.  
DOI • reference for this paper ※ DOI:10.18429/JACoW-IPAC2016-WEPMY035  
Export • reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)  
 
WEPOW034 Emittance Diagnostics at the Max Iv 3 Gev Storage Ring dipole, radiation, emittance, electron 2908
 
  • J. Breunlin, Å. Andersson
    MAX IV Laboratory, Lund University, Lund, Sweden
  
  With the MAX IV project in Lund, Sweden an ultralow emittance storage ring light source is going into user operation in 2016. Due to its multibend achromat lattice design the 3 GeV storage ring reaches a horizontal emittance lower than 330 pm rad. Emittance diagnostic will involve two diagnostic beamlines to image the electron beam with infrared and ultraviolet synchrotron radiation from bending dipoles. Placed in locations of different optic functions the beamlines will provide experimental access to both horizontal and vertical emittance and to beam energy spread. Since bunch lengthening with harmonic cavities is essential for machine performance, time resolved measurements with synchrotron radiation for individual longitudinal bunch distributions are of special interest as well.  
DOI • reference for this paper ※ DOI:10.18429/JACoW-IPAC2016-WEPOW034  
Export • reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)  
 
WEPOY051 Performance Optimization of Multi-particle Beam Dynamics Code IMPACT-Z on NVidia GPGPU GPU, operation, lattice, linac 3110
 
  • Z.Q. He, G. Shen, Y. Yamazaki
    FRIB, East Lansing, Michigan, USA
  • X. Wang
    ICER, MSU, East Lansing, USA
  
  Funding: The work is supported by the U.S. National Science Foundation , the U.S. Department of Energy Office of Science, the Institute for Cyber-Enabled Research, MSU.
Facility for Rare Isotope Beams is designed using a multiparticle tracking code IMPACT-Z. IMPACT-Z is originally for the purpose of accelerator design, so it is precise, however, quite time consuming, therefore usually not suitable for on-line beam tuning applications. IMPACT-Z is originally boosted using Message Passing Interface (MPI) technology. For single node mode, performance of IMPACT-Z is usually bounded by CPU performance, and for multimode mode, communication between MPI processes would become bottleneck. However, new emerging High Performance Computing (HPC) technology, like general-purpose graphics processing unit (GPGPU), brings new possibility in accelerating IMPACT-Z, so that the speed of IMPACT-Z satisfies for on-line beam tuning applications. This paper presents the efforts in exploring the capability of Nvidia GPGPU and the results of speed up of IMPACT-Z. 		 
DOI • reference for this paper ※ DOI:10.18429/JACoW-IPAC2016-WEPOY051  
Export • reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)  
 
THYA01 Advanced Concepts and Methods for Very High Intensity Linacs emittance, space-charge, focusing, simulation 3155
 
  • P.A.P. Nghiem, N. Chauvin, D. Uriot
    CEA/DSM/IRFU, France
  • M. Comunian
    INFN/LNL, Legnaro (PD), Italy
  • C. Oliver
    CIEMAT, Madrid, Spain
  • W. Simeoni
    IF-UFRGS, Porto Alegre, Brazil
  • M. Valette
    CERN, Geneva, Switzerland
  
  For very high intensity linacs, both beam power and space charge should be taken into consideration for any analysis of accelerators aiming at comparing their performances and pointing out the challenging sections. As high beam power is an issue from the lowest energy, careful and exhaustive beam loss predictions have to be done. High space charge implies lattice compactness making the implementation of beam diagnostics very problematic, so a clear strategy for beam diagnostic has to be defined. Beam halo becomes no longer negligible, and it plays a significant role in the particle loss process. Therefore, beam optimization must take the halo into account and beam characterization must be able to describe the halo part in addition to the core one. This presentation discusses advanced concepts and methods for beam analysis, beam loss prediction, beam optimization, beam diagnostic and beam characterization especially dedicated to very high intensity accelerators.  
slides icon Slides THYA01 [6.177 MB]  
DOI • reference for this paper ※ DOI:10.18429/JACoW-IPAC2016-THYA01  
Export • reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)  
 
THPOY036 A New Fast RF Trip Diagnostic System in SSRF vacuum, cavity, pick-up, klystron 4182
 
  • S.J. Zhao, Q. Chang, H.T. Hou, Z. Li, K. Xu, W.Z. Zhang, Zh.G. Zhang, Y.B. Zhao, X. Zheng
    SINAP, Shanghai, People's Republic of China
  
  A RF trip diagnostic system is essential to find out the trip source when a trip happened. In this paper, a fast RF trip diagnostic system, in storage ring RF system of SSRF, is reported. This system includes a synchronous acquisition recorder to sampling the trip data and a trip server to analysis the data. The recorder has more than 100 channels and maximum sampling rate of each channel is up to 60 MSPS. High precision I/Q cards are designed to detect RF signals. Trip server has been developed to process the trip data.  
DOI • reference for this paper ※ DOI:10.18429/JACoW-IPAC2016-THPOY036  
Export • reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)  
 
THPOY052 Current Status of HES (Hard X-ray EndStation)-2 Beamline at PAL-XFEL detector, focusing, laser, optics 4225
 
  • S. Kim, B. Kim, K.H. Nam, J. Park
    PAL, Pohang, Republic of Korea
  
  HES (Hard X-ray EndStation)-2 beamline is located at the hard X-ray experimental hall at PAL-XFEL. The main objective of HES-2 beamline is to deliver a hard X-ray FEL beam to target materials in such a manner that a coherent diffraction study is possible. This endstation is supposed to provide brilliant hard x-rays and to measure the diffraction patterns with forward scattering geometry. In particular, the instruments are designed for serial femtosecond X-ray crystallography (SFX) and coherent diffraction imaging (CDI). In this poster, we introduce HES-2 beamline at PAL-XFEL in terms of two perspectives: beamline instrumentation and sample environment. In the instrumentation part, the current status of HES-2 beamline is described in details. This includes beamline layout, x-ray optics, beam diagnositics and the upcoming commissioning plan for HES-2 beamline. In the sample environment part, we aim to present scientific goals based on the sample environments for CXI and SFX respectively. Finally, we discuss the feasible demo-experiments, which is expected to be done in 2016.  
DOI • reference for this paper ※ DOI:10.18429/JACoW-IPAC2016-THPOY052  
Export • reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)