Keyword: ion-source
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TUPB034 A Helium Injector for Coupled RFQ and SFRFQ Cavity Project at Peking University ion, solenoid, rfq, extraction 552
  • S.X. Peng, J. Chen, J.E. Chen, S.L. Gao, Z.Y. Guo, P.N. Lu, H.T. Ren, Z. Wang, Y. Xu, J. Zhao
    PKU/IHIP, Beijing, People's Republic of China
  A new acceleration structure named as coupled RFQ and SFRFQ cavity is under design at Peking University (PKU). A pulsed He+ beam injector will be needed to transport 30 keV 20 mA He+ beam with a factor of 1/6, pulse width of 1 ms and normalized rms emittance less than 0.15 π{·}mm{·}mrad for this composited type cavity. Based on the experimental results obtained on the PKU LEBT test bench, a 1.16 m long two-solenoid type low energy beam transport (LEBT) line was developed. In this paper we will address the 30 keV He+ ion beam transportation experiment results on the test bench as well as the specific design on the helium injector.  
THPB004 Current Status of the RAL Front End Test Stand (FETS) Project rfq, ion, simulation, diagnostics 846
  • D.C. Plostinar, C. Gabor
    STFC/RAL/ASTeC, Chilton, Didcot, Oxon, United Kingdom
  • S.M.H. Alsari, M. Aslaninejad, A. Kurup, J.K. Pozimski, P. Savage
    Imperial College of Science and Technology, Department of Physics, London, United Kingdom
  • J.J. Back
    University of Warwick, Coventry, United Kingdom
  • G.E. Boorman, A. Bosco
    Royal Holloway, University of London, Surrey, United Kingdom
  • M.A. Clarke-Gayther, D.C. Faircloth, S.R. Lawrie, A.P. Letchford
    STFC/RAL/ISIS, Chilton, Didcot, Oxon, United Kingdom
  • S. Jolly
    UCL, London, United Kingdom
  The UK proton accelerator strategy aims to develop a viable high power proton driver with applications including spallation neutrons, the neutrino factory and ADSR. An essential first ingredient, identified as one of the main UK R&D accelerator projects, is the Front End Test Stand (FETS) at the Rutherford Appleton Laboratory (RAL), aimed at producing a high quality, high current, cleanly chopped H beam. Through its component parts, FETS has triggered development of a high brightness, 60 mA H ion source, a three-solenoid Low Energy Beam Transport line (LEBT), a 3 MeV four-vane Radio-Frequency Quadrupole (RFQ) and a Medium Energy Beam Transport line (MEBT) with a high speed chopper. The project is well advanced and when operational should be sufficiently versatile to explore a range of operating conditions. In this paper we present the current status of the construction, and plans for operation, experiments and future development.  
THPB044 Plans for an Integrated Front-End Test Stand at the Spallation Neutron Source rfq, klystron, ion, controls 954
  • M.S. Champion, A.V. Aleksandrov, M.T. Crofford, D. Heidenreich, Y.W. Kang, J. Moss, R.T. Roseberry, J.P. Schubert
    ORNL, Oak Ridge, Tennessee, USA
  Funding: Work performed at Oak Ridge National Laboratory, which is managed by UT-Battelle, LLC, under contract DE-AC05-00OR22725 for the U.S. Department of Energy.
A spare Radio-Frequency Quadrupole (RFQ) is presently being fabricated by industry with delivery to Oak Ridge National Laboratory planned in late 2012. The establishment of a test stand at the Spallation Neutron Source site is underway so that complete acceptance testing can be performed during the winter of 2012-2013. This activity is the first step in the establishment of an integrated front-end test stand that will include an ion source, low-energy beam transport (LEBT), RFQ, medium-energy beam transport, diagnostics, and a beam dump. The test stand will be capable of delivering an H ion beam of up to 50 mA with a pulse length of 1 ms and a repetition rate of 60 Hz or a proton beam of up to 50 mA, 100 μs, 1 Hz. The test stand will enable the following activities: complete ion source characterization; development of a magnetic LEBT chopper; development of a two-source layout; development of beam diagnostics; and study of beam dynamics of high intensity beam.
THPB094 Performance of Beam Chopper at SARAF via RF Deflector Before the RFQ rfq, simulation, ion, proton 1038
  • A. Shor, D. Berkovits, I. Fishman, A. Grin, B. Kaizer, L. Weissman
    Soreq NRC, Yavne, Israel
  We describe performance of a beam chopper at the SARAF accelerator consisting of an HV deflector preceding the RFQ. The deflector and electronics, developed at LNS Catania, was designed to provide slow beam chopping for beam testing and diagnostics where low beam power is necessary. The HV deflector sweeps away the low energy beam onto a water cooled beam catcher, while a fast HV switch momentarily switches off the HV whenever a transmitted beam to the RFQ is desired. We report on measurements with this chopping system, where minimum transmitted beam pulse of 180 ns duration is attained with a rise and fall time of several nano-seconds. We performed beam dynamics simulations of SARAF Phase-I, including the deflector, where the short rise and fall times of the chopped beam is attributed to the tight collimation of the deflected beam provided by the RFQ and the fast Faraday Cup. We also describe beam dynamics simulations which suggest that single RFQ bunch selection can be achieved with the existing chopping system, during zero-crossover for positive-negative deflecting HV waveform.  
THPB097 FRIB Front End Design Status rfq, ion, linac, ECR 1047
  • E. Pozdeyev, N.K. Bultman, G. Machicoane, G. Morgan, X. Rao, Q. Zhao
    FRIB, East Lansing, Michigan, USA
  • V.L. Smirnov, S.B. Vorozhtsov
    JINR, Dubna, Moscow Region, Russia
  • J. Stovall
    CERN, Geneva, Switzerland
  • L.T. Sun
    IMP, Lanzhou, People's Republic of China
  • L.M. Young
    LANL, Los Alamos, New Mexico, USA
  Funding: Work supported by the U.S. Department of Energy Office of Science under Cooperative Agreement DE-SC0000661
The Facility for Rare Isotope Beams (FRIB) will provide a wide range of primary ion beams for nuclear physics research with rare isotope beams. The FRIB SRF linac will be capable of accelerating medium and heavy ion beams to energies beyond 200 MeV/u with a power of 400 kW on the fragmentation target. This paper presents the status of the FRIB Front End designed to produce uranium and other medium and heavy mass ion beams at world-record intensities. The paper describes the FRIB high performance superconducting ECR ion source, the beam transport designed to transport two-charge state ion beams and prepare them for the injection in to the SRF linac, and the design of a 4-vane 80.5 MHz RFQ. The paper also describes the integration of the front end with other accelerator and experimental systems.
FR1A02 Light Ion ECR Sources State of the Art for Linacs ion, plasma, emittance, extraction 1055
  • R. Gobin
    CEA/IRFU, Gif-sur-Yvette, France
  • N. Chauvin, O. Delferrière, O. Tuske, D. Uriot
    CEA/DSM/IRFU, France
  Since the middle of the 90’s development of high intensity light ion injectors are undertaken at CEA-Saclay. The first 100 mA proton beam has been produced by the SILHI ECR source in the framework of the IPHI project. Ever since, more than 100 mA of protons or deuteron beams, with high purities, have been regularly produced in pulsed or continuous mode, and with very good beam characteristics analyzed in dedicated beam diagnostics. CEA-Saclay is currently involved in several high intensity LINAC projects such as Spiral2, IFMIF-EVEDA and FAIR, and is in charge of their source and LEBT design and construction. This article reports the latest developments and experimental results carried out at CEA-Saclay for the 3 projects. In addition, a review of the developments and beam results performed in other laboratories worldwide will be also presented.  
slides icon Slides FR1A02 [4.743 MB]