Keyword: acceleration
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MOPO084 The Simulation and Manufacture of the Room Temperature CH-DTL cavity, impedance, DTL, linac 177
 
  • J.H. Li, G. Han
    China Institute of Atomic Energy, Beijing, People’s Republic of China
  • C.G. Li
    CIAE, Beijing, People’s Republic of China
  • Z. Li
    SCU, Chengdu, People’s Republic of China
 
  The room temperature Cross-bar H Type Drift Tube Linac (CH-DTL) is one of the candidate acceleration structures working in CW mode. In order to optimize the parameters, the 3 dimensional electromagnetic field of the CH-DTL cavity is simulated. The method of parameter sweeping with constraint variable is better than the method of parameter sweeping with only one variable during the optimization. In order to simplify the manufacture, the drift tube surface can be designed as spherical shape. The CH-DTL cavity has been manufactured and tested.  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-LINAC2018-MOPO084  
About • paper received ※ 31 August 2018      issue date ※ 18 January 2019  
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MOPO132 The 7 MeV APF DTL for Proton Therapy DTL, proton, rfq, simulation 277
 
  • X.C. Xie, D.M. Li, X. Li, Y.H. Pu, J. Qiao, M.H. Zhao, Z.T. Zhao
    SINAP, Shanghai, People’s Republic of China
  • Y.H. Pu, X.C. Xie, F. Yang
    Shanghai APACTRON Particle Equipment Company Limited, Shanghai, People’s Republic of China
 
  Funding: This work is fund by Ministry of Science and Technology of the People’s Repulic of China, under Grant Number 2016YFC0105408
A 7MeV alternating phase focused (APF) drift tube linear (DTL) for proton therapy has been designed, and a design code has been developed based on a sinusoidal synchronous phase formula and a linearly increasing electrode voltage assumption. The design procedure includes the radio frequency quadrupole (RFQ) to drift tube linac (DTL) matching, and end-to-end simulation that conducted by Trace Win. Moreover, a cutting method has been performed to correct the integral electric field deviation of RF gaps.
 
slides icon Slides MOPO132 [4.219 MB]  
poster icon Poster MOPO132 [2.604 MB]  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-LINAC2018-MOPO132  
About • paper received ※ 20 August 2018      issue date ※ 18 January 2019  
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TU2A01 First Acceleration of Heavy Ion Beams with a Superconducting Continuous Wave HIM/GSI CW-linac cavity, linac, heavy-ion, emittance 297
 
  • W.A. Barth, K. Aulenbacher, F.D. Dziuba, V. Gettmann, T. Kürzeder, M. Miski-Oglu
    HIM, Mainz, Germany
  • K. Aulenbacher
    IKP, Mainz, Germany
  • W.A. Barth, M. Heilmann, A. Rubin, A. Schnase, S. Yaramyshev
    GSI, Darmstadt, Germany
  • M. Basten, M. Busch, H. Podlech, M. Schwarz
    IAP, Frankfurt am Main, Germany
 
  First acceleration of heavy ion beams with a superconducting continuous wave HIM/GSI CW-Linac After successful RF-testing of a new superconducting Linac RF-cavity at GSI Helmholtzzentrum für Schwerionenforschung and a short commissioning and ramp up time of some days, this 15-gaps Crossbar H-cavity accelerated first time heavy ion beams with full transmission up to the design beam energy. The design acceleration gain of 3.5 MV inside a length of less than 70 cm has been verified with heavy ion beam of up to 1.5 particle mkA. The measured beam parameters show a nice beam quality. The machine commissioning with beam is a milestone of the R&D work of Helmholtz Institute Mainz and GSI in collaboration with Goethe University Frankfurt in development of the superconducting heavy ion continuous wave linear accelerator CW-Linac.  
slides icon Slides TU2A01 [3.385 MB]  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-LINAC2018-TU2A01  
About • paper received ※ 11 September 2018      issue date ※ 18 January 2019  
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TUPO001 About the Limits for the Accelerated Beam Current in the LUE-200 Linac of the IREN Facility klystron, linac, electron, neutron 320
 
  • A.P. Sumbaev
    JINR, Dubna, Moscow Region, Russia
  • A.M. Barnyakov, A.E. Levichev
    BINP SB RAS, Novosibirsk, Russia
 
  The beam current loading of the accelerating fields is discussed for the linear accelerator LUE-200 of IREN facility. LUE-200 electron Linac consits of two disk loaded travelling wave accelerating structure with the operating frequency of 2856 MHz and power compression SLED-type system. The limits by the accelerated beam current are defined for different pulse durations of the beam current and RF power. The calculated results are discussed and compared with the measurements.  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-LINAC2018-TUPO001  
About • paper received ※ 12 September 2018      issue date ※ 18 January 2019  
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TUPO005 Initial Beam Commissioning of LEAF at IMP rfq, emittance, MMI, ECR 332
 
  • Y. Yang, W.P. Dou, X. Fang, Y.H. Guo, H. Jia, L. Jing, X.J. Liu, L. Lu, W. Lu, W. Ma, L.T. Sun, L.P. Sun, W. Wei, H.W. Zhao, Y.H. Zhai
    IMP/CAS, Lanzhou, People’s Republic of China
 
  A Low Energy intense-highly-charged ion Accelerator Facility (LEAF), which mainly includes an ECR ion source, LEBT and an 81.25 MHz RFQ, was designed to produce and accelerate heavy ions, from helium to uranium with A/Q between 2 and 7, to the energy of 0.5 MeV/u. The typical beam intensity is designed up to 2 emA CW for the uranium beam. The facility has been successfully commissioned with He+ (A/Q=4) and N2+ (A/Q=7) beams and accelerated the beams in the CW regime to the designed energy of 0.5 MeV/u. Beam properties and transmission efficiencies were measured, indicating a good consistency with simulated data. After having briefly recalled the project scope and parameters, this paper describes the beam commissioning strategy and detailed commissioning results.  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-LINAC2018-TUPO005  
About • paper received ※ 11 September 2018      issue date ※ 18 January 2019  
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TUPO010 Muon Acceleration Test with the RFQ Towards the Development of the Muon Linac experiment, rfq, simulation, diagnostics 342
 
  • R. Kitamura
    University of Tokyo, Tokyo, Japan
  • S. Bae, S. Choi, B. Kim
    SNU, Seoul, Republic of Korea
  • Y. Fukao, K. Futatsukawa, N. Kawamura, T. Mibe, Y. Miyake, T. Yamazaki
    KEK, Tsukuba, Japan
  • K. Hasegawa, Y. Kondo, T. Morishita
    JAEA/J-PARC, Tokai-Mura, Naka-Gun, Ibaraki-Ken, Japan
  • T. Iijima, Y. Sue
    Nagoya University, Graduate School of Science, Chikusa-ku, Nagoya, Japan
  • H. Iinuma, Y. Nakazawa
    Ibaraki University, Hitachi, Ibaraki, Japan
  • K. Ishida
    RIKEN Nishina Center, Wako, Japan
  • S. Li
    The University of Tokyo, Graduate School of Science, Tokyo, Japan
  • M. Otani, N. Saito
    J-PARC, KEK & JAEA, Ibaraki-ken, Japan
  • G.P. Razuvaev
    Budker INP & NSU, Novosibirsk, Russia
 
  The muon linac to accelerate muons 212 MeV is planned in order to measure the muon dipole moments precisely in the J-PARC. The muon acceleration with a RF accelerator hasn’t been demonstrated yet in the world. Therefore the muon acceleration test with the RFQ as the feasibility test of the muon linac was demonstrated at the Muon D line in the J-PARC MLF. Conventional muons are cooled with producing ultra-slow muons using the muonium production and the ionization laser for the muon linac. However these apparatuses couldn’t be used because of the limitation of the experimental area in the acceleration test. Therefore the conventional muon was converted to the negative muonium ion (Mu-) with less than 2 keV using the thin aluminum foil target as the easy cooling method. The Mu- was finally accelerated to 90 keV using the RFQ. The accelerated Mu- was selected with a diagnostic beam line and identified with the Time-Of-Flight measurement using a MCP detector. The result of the world’s first muon acceleration test with the RFQ will be reported in this presentation.  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-LINAC2018-TUPO010  
About • paper received ※ 12 September 2018      issue date ※ 18 January 2019  
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TUPO011 Upgrade of Heavy Ion Injector I-3 at ITEP heavy-ion, emittance, laser, ion-source 346
 
  • N.N. Alexeev, P.N. Alekseev, V. Andreev, T. Kulevoy, A.D. Milyachenko, V.I. Nikolaev, Yu.A. Satov, A. Shumshurov, A. Zarubin
    ITEP, Moscow, Russia
 
  Heavy ion injector I-3 represents two-gap 2.5 MHz resonator with accelerating voltage 2x2 MV. It‘s used with laser ion source for acceleration of heavy ions in wide range of charge to mass ratio. As a result of modernization, injector structure will be supplemented by the second two-gap resonator, rf voltage will be increased to 3x4 MV and accelerated beam structure has to be improved by increasing accelerating frequency to 5 MHz. Design features of upgraded linac and peculiarity of beam dynamics for different types of ions are presented.  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-LINAC2018-TUPO011  
About • paper received ※ 03 September 2018      issue date ※ 18 January 2019  
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TUPO045 Optimization of Dual Axis Asymmetric Cavity for Energy Recovery Linac cavity, linac, HOM, coupling 435
 
  • Ya.V. Shashkov, A.M. Bulygin, M. Gusarova
    MEPhI, Moscow, Russia
  • I.V. Konoplev
    JAI, Oxford, United Kingdom
  • F. Marhauser
    JLab, Newport News, Virginia, USA
  • A. Seryi
    SLAC, Menlo Park, California, USA
 
  Funding: The reported study was funded by RFBR according to the research project № 18-302-00990
Optimization of the dual axis asymmetric cavity was performed to minimize the ratio of the peak magnetic and electric fields values to the accelerating voltage, to increase the distance between operating and neighbouring modes as well as to reduce the manufacturing cost of the cavity. To reach the goals several solutions have been suggested bringing the ratios to the acceptable values and leading to simplification of the manufacturing of the structure.
 
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-LINAC2018-TUPO045  
About • paper received ※ 12 September 2018      issue date ※ 18 January 2019  
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TUPO112 Calculation of Electron Beam Dynamics in Four Accelerating Stations for JINR Linear Electron Accelerator LINAC-200 electron, linac, solenoid, detector 566
 
  • A. Sledneva, V. Aleksandrov, V.V. Kobets
    JINR, Dubna, Moscow Region, Russia
 
  In the Joint Institute for Nuclear Research a Test Stand with an electron beam generated by the linear accelerator LINAC-200 with the energy up to 200 MeV is being constructed to investigate properties of accelerating and semiconducting structures for advanced detectors, a radiation resistance of detectors based on gallium arsenide semiconductor, to study a free electron laser and to do other applied for work. The technical characteristics of the LINAC-200 accelerator make it possible to create an advanced system of test beams for scientific and methodological studies of detectors on its basis. Four accelerating stations with maximum beam energy up to 200 MeV are put into operation. The work is being carried out for experiments with electron test beams with energy up to 800 MeV. This work presents the calculation results of the magnetic field of the focusing solenoidal system and electron beam dynamics in accelerating stations. In addition, the results on the formation of the electron beam with optimal parameters to be captured in further accelerating sections.  
poster icon Poster TUPO112 [1.176 MB]  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-LINAC2018-TUPO112  
About • paper received ※ 12 September 2018      issue date ※ 18 January 2019  
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TH1A03 High Brightness Electron Beams from Plasma-based Acceleration plasma, electron, FEL, simulation 637
 
  • A. Marocchino, A. Biagioni, E. Brentegani, E. Chiadroni, M. Ferrario, F. Filippi, A. Giribono, R. Pompili, A.R. Rossi
    INFN/LNF, Frascati (Roma), Italy
  • A. Bacci
    Istituto Nazionale di Fisica Nucleare, Milano, Italy
  • A. Cianchi
    Università di Roma II Tor Vergata, Roma, Italy
  • V. Petrillo
    Universita’ degli Studi di Milano, Milano, Italy
 
  Funding: INFN-CNAF and CINECA for high performance computing resources. European Union Horizon 2020 programme N. 53782.
Plasma Wakefield acceleration is a promising new acceleration techniques that profit by a charged bunch, e.g. an electron bunch, to break the neutrality of a plasma channel to produce a wake where a trailing bunch is eventually accelerated. The quest to achieve extreme gradient conserving high brightness has prompted to a variety of new approaches and techniques. Most of the proposed schemes are however limited to the only plasma channel, assuming in the vast majority of cases, ideal scenarios (e.g. ideal bi-gaussian bunches and uniform density plasma channels). Realistic start-to-end simulations, from the photo-cathode to FEL via a high gradient, emittance and energy spread preserving plasma section, are mandatory for paving the way towards plasma-based user facilities.
 
slides icon Slides TH1A03 [25.814 MB]  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-LINAC2018-TH1A03  
About • paper received ※ 11 September 2018      issue date ※ 18 January 2019  
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TH1A04 The Proton Driven Advanced Wake Field Acceleration Experiment (AWAKE) at CERN plasma, proton, electron, wakefield 642
 
  • S. Döbert
    CERN, Geneva, Switzerland
 
  The Advanced Proton Driven Plasma Wakefield Acceleration Experiment (AWAKE) aims at studying plasma wake field generation and electron acceleration driven by proton bunches. It is a proof-of-principle R&D experiment at CERN and the world’s first proton driven plasma wake field acceleration experiment. The experiment uses the 400 GeV proton beam from the SPS which travels through a 10 m long Rb-vapour plasma cell where it gets self-modulated and generates the plasma wake fields. Eventually an electron beam is injected externally to probe the wake-fields. AWAKE will has completed several experimental campaigns starting in 2016. Results from the initial characterization of the plasma cell and measurements of the seeded self-modulation of the proton beam will be presented. Experiments to accelerate externally injected electrons using the proton driven plasma wake fields will start in 2018 and first results will be reported.  
slides icon Slides TH1A04 [4.787 MB]  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-LINAC2018-TH1A04  
About • paper received ※ 12 September 2018      issue date ※ 18 January 2019  
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TH1P02 Injection Complex Development for the NICA-project at JINR rfq, linac, booster, heavy-ion 663
 
  • A.V. Butenko, B.V. Golovenskiy, A. Govorov, A.D. Kovalenko, V.A. Monchinsky, A.V. Smirnov, G.V. Trubnikov
    JINR, Dubna, Moscow Region, Russia
  • D.E. Donets, K.A. Levterov, D.A. Lyuosev, A.A. Martynov, V.V. Mialkovskiy, D.O. Ponkin, K.V. Shevchenko, I.V. Shirikov, A.O. Sidorin
    JINR/VBLHEP, Dubna, Moscow region, Russia
  • H. Höltermann, H. Podlech, U. Ratzinger, A. Schempp
    BEVATECH, Frankfurt, Germany
  • T. Kulevoy
    ITEP, Moscow, Russia
  • S.M. Polozov
    MEPhI, Moscow, Russia
 
  The new accelerator complex Nuclotron-based Ion Collider fAcility (NICA) is still under construction at JINR, Dubna. Two Linacs should serve as injectors for this new accelerator complex. LU-20 as an Alvarez based lLinac for light polarized ions and the new Heavy Ion Linear Accelerator HILAC dedicated to heavy ion beam operation. Main results of the HILAC commissioning with carbon beam from the laser ion source should be discussed. Besides a new R&D-project is ongoing to developed superconducting cavities for a new light ion linear injector which created to upgrade the injector complex. The current status of linac design and results of the beam dynamics simulations and SRF technology developments should be presented as well.  
slides icon Slides TH1P02 [8.162 MB]  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-LINAC2018-TH1P02  
About • paper received ※ 17 September 2018      issue date ※ 18 January 2019  
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THPO012 Once Recirculating Energy Recovery Linac Operation of S-DALINAC* linac, operation, recirculation, simulation 710
 
  • M. Arnold, J. Birkhan, J. Pforr, N. Pietralla, F. Schließmann, M. Steinhorst
    TU Darmstadt, Darmstadt, Germany
  • F. Hug
    KPH, Mainz, Germany
 
  Funding: *Work supported by DFG through GRK 2128 and INST163/383-1/FUGG
Since 1991 the superconducting S-DALINAC is running in recirculating operation. It was built in a twice recirculating layout. A third recirculation beam line was added in 2015/2016 as an upgrade. The new recirculation beam line is installed in-between the two existing beam lines. It houses a path length adjustment system capable of changing the length of the orbit for recirculation by up to 10 cm corresponding to the RF wave length at the operation frequency of 3 GHz and consequently to a freedom of RF phase adjustment by 360°. The new beam line can, thus, be utilized for an accelerating operation or, if the change in phase is set to 180°, for an energy recovery linac (ERL) operation. In August 2017 the S-DALINAC was first operated in once recirculating ERL mode and became the first running ERL in Germany. Different aspects of this ERL run have been observed and were evaluated. The layout of the S-DALINAC allows a once or twice recirculating ERL mode. Beam dynamics simulations for both modes have been conducted or are currently under investigation. This contribution will discuss the once recirculating ERL operation, its results, and future plans concerning ERL measurements.
 
poster icon Poster THPO012 [0.708 MB]  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-LINAC2018-THPO012  
About • paper received ※ 12 September 2018      issue date ※ 18 January 2019  
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THPO016 Investigation of 2D PBG Waveguides for THz Driven Acceleration GUI, impedance, photon, electron 714
 
  • A. Vint, R. Letizia
    Cockcroft Institute, Lancaster University, Lancaster, United Kingdom
  • R. Letizia
    Lancaster University, Lancaster, United Kingdom
 
  Funding: Work supported by the STFC PhD Studentship
Novel accelerating techniques that overcome the limitations of conventional RF technology are receiving significant interest. Moving from RF to the THz frequency range, higher gradient of acceleration of high energy beams can be achieved in miniaturised structures. Moreover, with respect to the optical frequency range, the THz regime allows for larger structures and better beam quality to be obtained. In this paper, we investigate the use of a 2D photonic bandgap (PBG) waveguide for THz driven electron acceleration. In accelerator applications, the properties of PBG waveguides can be exploited to damp higher order modes and offer low-loss dielectric confinement at high frequency. In particular, 2D PBG waveguides offer a good compromise between manufacturability, total photonic bandgap confinement, and ease of parallel illumination. The structure here proposed is optimised for maximum bandgap and single mode operation. Dispersion characteristics of the accelerating mode are studied to achieve the best compromise between high accelerating field and effective accelerating bandwidth, given a ~10% bandwidth of the THz driving pulse.
 
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-LINAC2018-THPO016  
About • paper received ※ 12 September 2018      issue date ※ 18 January 2019  
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THPO020 Dynamic Behavior of Electron Beam under Rf Field and Static Magnetic Field in Cyclotron Auto-resonance Accelerator electron, SRF, GUI, resonance 725
 
  • Y.T. Yuan
    HUST, Wuhan, People’s Republic of China
  • K. Fan
    Huazhong University of Science and Technology, State Key Laboratory of Advanced Electromagnetic Engineering and Technology,, Hubei, People’s Republic of China
  • Y. Jiang
    Yale University, Beam Physics Laboratory, New Haven, Connecticut, USA
 
  Funding: the National Natural Science Foundation of China
The cyclotron auto-resonance accelerator (CARA) is a novel concept of accelerating continuous gyrating charged-particle beams to moderately or highly relativistic energies, which can be used as the high power microwave source and applied in environment improvement area, particularly in the flue gas pollution remediation. In CARA, the continuous-wave (CW) electron beam follows a gyrating trajectory while undergoing the interaction with the rotating TE-mode rf field and tapered static magnetic field. In the process of gyrating acceleration, the phase synchronization with the rf field is automatically maintained, so to speak, with auto-resonance. Simulation models are constructed to study the effect of rf field and static magnetic field on electron beam in CARA, where the beam energy, trajectory and velocity component are analysed. The simulation results match reasonably well with theoretical predication, which sets up a solid foundation for future designs of CARA.
 
poster icon Poster THPO020 [1.448 MB]  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-LINAC2018-THPO020  
About • paper received ※ 11 September 2018      issue date ※ 18 January 2019  
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THPO048 Low Power Measurement of a 1300-MHz RFQ Cold Model rfq, linac, experiment, emittance 794
 
  • Y. Kondo, T. Morishita, J. Tamura
    JAEA/J-PARC, Tokai-mura, Japan
  • M. Otani
    KEK, Ibaraki, Japan
 
  Funding: This work is supported by JSPS KAKENHI Grant Number 17K18784.
A muon linac development for a new muon g-2/EDM experiment is now going on at J-PARC. Muons from the muon beam line (H-line) of the J-PARC muon facility are once stopped in a silica aerojel target and room temperature muoniums are evaporated from the aerogel. They are dissociated with the lasers to be the ultra slow muons, then accelerated up to 212 MeV using a linear accelerator. The low energy part of this muon linac consists of a 324-MHz RFQ and an IH DTL. The frequency is increased to 1296 MHz at the following CCL section. We propose to replace the low energy section to a 1300-MHz RFQ to simplify the configuration of the muon linac. The 1300-MHz RFQ will be extremely small compared to conventional RFQs, therefore we made a cold model to proof the feasibility of this scheme. In this paper, the result of low-power measurement of the 1300-MHz RFQ cold model is described.
 
slides icon Slides THPO048 [2.160 MB]  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-LINAC2018-THPO048  
About • paper received ※ 12 September 2018      issue date ※ 18 January 2019  
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THPO052 High Power Test of the LEAF-RFQ rfq, quadrupole, cavity, operation 808
 
  • L. Lu, Y. He, W. Ma, L.B. Shi, L.T. Sun, L.P. Sun, L. Yang, Y. Yang, H.W. Zhao
    IMP/CAS, Lanzhou, People’s Republic of China
 
  High power heavy ion drivers require a CW low-frequency accelerator for initial acceleration. A CW four-vane radio frequency quadrupole (RFQ) accelerator is designed to accelerate heavy ions A/q up to 7 from 14 keV/u to 500 keV/u, as a new injector for the Low Energy Accelerator Facility (LEAF) at Institute of Modern Physics (IMP). The measurements of low power test were reported previously. In this paper, the results of high power test of the RFQ, including the test of the acceleration systems and beam profiles, will be presented.  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-LINAC2018-THPO052  
About • paper received ※ 07 September 2018      issue date ※ 18 January 2019  
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THPO086 Beam Loss and Average Beam Current Measurements Using a CWCT proton, instrumentation, electronics, electron 882
 
  • F. Stulle, H. Bayle, J.F. Bergoz, T. Delaviere, L. Dupuy
    BERGOZ Instrumentation, Saint Genis Pouilly, France
  • P. Forck, M. Witthaus
    GSI, Darmstadt, Germany
  • D. Vandeplassche
    SCK•CEN, Mol, Belgium
  • J.X. Wu
    IMP/CAS, Lanzhou, People’s Republic of China
 
  The CWCT is a novel instrument adapted to an accurate average current determination of bunched CW beams or macro pulses. By combining a high-droop current transformer with novel electronics for signal analysis, an output signal bandwidth of DC to about 500kHz and a current resolution down to the micro-ampere level are achieved. Beam current fluctuations are followed within microseconds, permitting fast detection of beam loss. These characteristics render the CWCT an ideal instrument for HPPAs, for example ADS linacs, and other proton or ion accelerators. We present the CWCT principle and the CWCT performance achieved in beam experiments at UNILAC, GSI.  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-LINAC2018-THPO086  
About • paper received ※ 11 September 2018      issue date ※ 18 January 2019  
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THPO127 The Effect of Energy Fluctuation on the Multi-bunch Acceleration in E-driven ILC Positron Source positron, beam-loading, cavity, booster 958
 
  • M. Kuriki, H. Nagoshi
    HU/AdSM, Higashi-Hiroshima, Japan
  • S. Kashiwagi
    Tohoku University, Research Center for Electron Photon Science, Sendai, Japan
  • K. Negishi
    Iwate University, Morioka, Iwate, Japan
  • T. Okugi, T. Omori, M. Satoh, Y. Seimiya, J. Urakawa, K. Yokoya
    KEK, Ibaraki, Japan
  • Y. Sumitomo
    LEBRA, Funabashi, Japan
  • T. Takahashi
    Hiroshima University, Graduate School of Science, Higashi-Hiroshima, Japan
 
  E-Driven method is a technical backup for positron source for ILC. In the positron source, the positron is generated and accelerated in a multi-bunch format with gaps in a macro-pulse. We employ AM (Amplitude Modulation) to suppress the transient beam-loading, but a small fluctuation is still expected, depending on the compensation accuracy. In this article, the positron yield which is ratio of numbers of positrons over electrons, is evaluated as a function of the compensation accuracy. With this result and the detail investigation of the beam loading compensation accuracy by AM, the positron yield of E-Driven Positron source for ILC is evaluated.  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-LINAC2018-THPO127  
About • paper received ※ 12 September 2018      issue date ※ 18 January 2019  
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FR1A03 Frontiers of Beam Diagnostics in Plasma Accelerators plasma, diagnostics, radiation, emittance 977
 
  • A. Cianchi
    Università di Roma II Tor Vergata, Roma, Italy
  • D. Alesini, M.P. Anania, M. Bellaveglia, F.G. Bisesto, M. Castellano, E. Chiadroni, G. Costa, M. Ferrario, F. Filippi, A. Giribono, A. Marocchino, A. Mostacci, R. Pompili, V. Shpakov, C. Vaccarezza, F. Villa
    INFN/LNF, Frascati (Roma), Italy
 
  Advanced diagnostics tools are crucial in the development of plasma-based accelerators. Accurate measurements of the beam quality at the exit of the plasma channel are mandatory for the optimization of the plasma accelerator. 6D electron beam diagnostics will be reviewed with emphasis on emittance measurement, which is particularly complex due to the peculiarity of the emerging beams.  
slides icon Slides FR1A03 [3.494 MB]  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-LINAC2018-FR1A03  
About • paper received ※ 06 September 2018      issue date ※ 18 January 2019  
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