TUB2 —  Working Group B - Session 2   (05-Jul-16   11:00—12:15)
Chair: M. Ikegami, FRIB, East Lansing, Michigan, USA
Paper Title Page
TUAM5Y01
 Beam Simulation Studies for FRIB  
 
  • Q. Zhao, M. Ikegami, S.M. Lund, F. Marti, G. Pozdeyev, J. Wei, Y. Yamazaki
    FRIB, East Lansing, Michigan, USA
  
  Funding: Work supported by the U.S. Department of Energy Office of Science under Cooperative Agreement DE-SC0000661.
we will report the recent beam simulation studies on the FRIB driver linac. 		 
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TUAM6Y01
 Experimental Investigation of Emittance Exchange in J-PARC Linac With Non-Equipartitioning Setting  
 
  • Y. Liu
    KEK/JAEA, Ibaraki-Ken, Japan
  • M. Ikegami
    FRIB, East Lansing, Michigan, USA
  • T. Maruta
    J-PARC, KEK & JAEA, Ibaraki-ken, Japan
  • A. Miura
    JAEA/J-PARC, Tokai-mura, Japan
  • T. Miyao
    KEK, Ibaraki, Japan
  • D.C. Plostinar
    STFC/RAL/ASTeC, Chilton, Didcot, Oxon, United Kingdom
  
  J-PARC is on the way to 1 MW operation step by step. J-PARC linac complected upgrade to 50 mA/400MeV in 2014, and the next main tasks of beam study are to optimize beam loss and output emittance for 40 mA and 50 mA operation. Residue radiation level at a lower repetition predicted that the beam loss becomes close to the maintenance limit in case of full operation at 50 mA. And intra-beam stripping (IBSt) effect in the H− beam is found to be the dominant source of the beam loss here. IBSt is only sensitive to lattice, so that the only solution is to be away from J-PARC baseline design with equipartitioning condition, in a safe way. In the previous work, emittace exchange and break of periodicity were predicted by the simulation and they are consistent with the "Hofmann chart". Series of experiments were carried out, not only for investigation of new lattice with controlled beam loss and emittance but also for a better understanding of rules of lattice optimization and the physics behind.  
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TUAM7Y11 High Current Uranium Beam Measurements at GSI-UNILAC for FAIR 319
 
  • W.A. Barth, A. Adonin, Ch.E. Düllmann, M. Heilmann, R. Hollinger, E. Jäger, O.K. Kester, J. Khuyagbaatar, J. Krier, E. Plechov, P. Scharrer, W. Vinzenz, H. Vormann, A. Yakushev, S. Yaramyshev
    GSI, Darmstadt, Germany
  • Ch.E. Düllmann, J. Khuyagbaatar, P. Scharrer, A. Yakushev
    HIM, Mainz, Germany
  • Ch.E. Düllmann
    Johannes Gutenberg University Mainz, Institut of Nuclear Chemistry, Mainz, Germany
  • P. Scharrer
    Mainz University, Mainz, Germany
  • S. Yaramyshev
    MEPhI, Moscow, Russia
  
  In the context of an advanced machine investigation program supporting the ongoing UNILAC (Universal Linear Accelerator) upgrade program, a new uranium beam intensity record (10 emA, U29+) at very high beam brilliance was achieved last year in a machine experiment campaign at GSI. The UNILAC as well as the heavy ion synchrotron SIS18 will serve as a high current heavy ion injector for the new FAIR (Facility for Antiproton and Ion Research) synchrotron SIS100. Results of the accomplished high current uranium beam measurements applying a newly developed pulsed hydrogen gas stripper (at 1.4'MeV/u) will be presented. The paper will focus on the evaluation and analysis of the measured beam brilliance and further implications to fulfil the FAIR heavy ion high intensity beam requirements.  
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DOI • reference for this paper ※ DOI:10.18429/JACoW-HB2016-TUAM7Y11  
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