Author: He, Z.Q.
Paper Title Page
MOPOY050 Beam Commissioning Plan of the FRIB Superconducting Linac 961
 
  • Y. Zhang, C.P. Chu, Z.Q. He, M. Ikegami, S.M. Lidia, S.M. Lund, F. Marti, G. Shen, Y. Yamazaki, Q. Zhao
    FRIB, East Lansing, Michigan, USA
 
  Funding: Work supported by the U.S. Department of Energy Office of Science under Cooperative Agreement DE-SC0000661
The FRIB superconducting linac will deliver all heavy ion beams with energy above 200 MeV/u, and beam power on target up to 400 kW for generation of short lived isotopes. Beam commissioning is the first step to prepare and tune the superconducting linac for high power operation. A staged beam commissioning plan of the FRIB linac is developed, and complete beam tuning practices segment by segment through the entire linac are introduced, which include phase scan signature matching of the superconducting cavities, longitudinal beam matching, transverse matching with horizontal-vertical beam coupling, and beam optics corrections of achromatic and isochronous folding segments up to the second order for acceleration and transport of multi charge state beams.
 
DOI • reference for this paper ※ DOI:10.18429/JACoW-IPAC2016-MOPOY050  
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WEYA01 Beam Physics and Technical Challenges of the FRIB Driver Linac 2039
 
  • Y. Yamazaki, H. Ao, N.K. Bultman, F. Casagrande, C. Compton, K.D. Davidson, A. Facco, F. Feyzi, P.E. Gibson, T. Glasmacher, Z.Q. He, L.T. Hoff, K. Holland, M. Ikegami, S.M. Lidia, Z. Liu, G. Machicoane, F. Marti, S.J. Miller, D. Morris, J. Popielarski, L. Popielarski, G. Pozdeyev, T. Russo, K. Saito, S. Shanab, G. Shen, S. Stark, H. Tatsumoto, R.C. Webber, J. Wei, T. Xu, Y. Zhang, Q. Zhao, Z. Zheng
    FRIB, East Lansing, Michigan, USA
  • K. Dixon, V. Ganni
    JLab, Newport News, Virginia, USA
  • A. Facco
    INFN/LNL, Legnaro (PD), Italy
  • K. Hosoyama, M. Masuzawa, K. Tsuchiya
    KEK, Ibaraki, Japan
  • M.P. Kelly, P.N. Ostroumov
    ANL, Argonne, Illinois, USA
  • R.E. Laxdal
    TRIUMF, Canada's National Laboratory for Particle and Nuclear Physics, Vancouver, Canada
 
  Funding: Work supported by the U.S. Department of Energy Office of Science under Cooperative Agreement DE-SC0000661.
The FRIB driver linac accelerates all the stable ion beams including uranium over 200 MeV/u with a CW beam power of 400 kW in order to produce isotopes as rare as possible. Except for 0.5 MeV/u RFQ, the linac is making use of superconducting (SC) RF technology. The beam power, which is an order of 2.5 as high as those of existing SC heavy ion linac, gives rise to many technical challenges as well as beam physics related ones. In particular, the uranium beam loss power density is approximately 30 times as high as the proton one with the same beam energy per nucleon and the same beam power. For this reason, the machine protection system needs a special care. Another example of the technical challenges is to install beam focusing solenoid as close as possible to SC cavities in order to ensure the frequent beam focusing both longitudinally and transversely. The talk reviews all these challenges with development results of their mitigation as well as construction status.
 
slides icon Slides WEYA01 [16.820 MB]  
DOI • reference for this paper ※ DOI:10.18429/JACoW-IPAC2016-WEYA01  
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WEPOY051 Performance Optimization of Multi-particle Beam Dynamics Code IMPACT-Z on NVidia GPGPU 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  
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