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Chinese Physics C> 2016, Vol. 40> Issue(8) : 087004 DOI: 10.1088/1674-1137/40/8/087004

Injection method of barrier bucket supported by off-aligned electron cooling for CRing of HIAF

  • 1.

     Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China

  • 2.

     University of Chinese Academy of Sciences, Beijing 100049, China

  • 3.

      Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China

  • 4.

      Joint Institute for Nuclear Research, Dubna 141980, Russian Federation

  • A new accelerator complex, HIAF (the High Intensity Heavy Ion Accelerator Facility), has been approved in China. It is designed to provide intense primary and radioactive ion beams for research in high energy density physics, nuclear physics, atomic physics as well as other applications. In order to achieve a high intensity of up to 5×1011 ppp 238U34+, the Compression Ring (CRing) needs to stack more than 5 bunches transferred from the Booster Ring (BRing). However, the normal bucket to bucket injection scheme can only achieve an intensity gain of 2, so an injection method, fixed barrier bucket (BB) supported by electron cooling, is proposed. To suppress the severe space charge effect during the stacking process, off-alignment is adopted in the cooler to control the transverse emittance. In this paper, simulation and optimization with the BETACOOL program are presented.
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  • References

    [1] J. C. Yang, J. W. Xia, G. Q. Xiao et al, Nuclear Instruments and Methods in Physics Research Section B, 317: 263 (2013)
    [2] H. H. Gutbrod, I. Augustin, H. Eickhoff et al, FAIR Baseline Technical Report (Darmstadt: GSI, 2006), p. 429
    [3] J. E. Griffin, C. Ankenbrandt, J. A. MacLachlan et al, IEEE Trans. Nucl. Sci., NS-30(4): 3502 (1983)
    [4] T. Katayama, C. Dimopoulou, F. Nolden et al, Simulation study of barrier bucket accumulation with stochastic cooling at GSI ESR, in Proceedings of COOL'11, edited by I. Meshkov (Alushta: JINR, 2011), p. 136
    [5] M. Steck, C. Dimopoulou, B. Franzke et al, Demonstration of Longitudinal Stacking in the ESR with Barrier Buckets and Stochastic Cooling, in Proceedings of COOL'11, edited by I. Meshkov (Alushta: JINR, 2011), p. 140
    [6] C. M. Bhat, Applications of barrier bucket RF systems at Fermilab, in PRIA2006, edited by K. Takayama (Tsukuba: KEK, 2006), p. 156
    [7] M. Fujieda, Y. Iwashita, A. Noda et al, Phys. Rev. ST Accel. Beams, 2: 122001 (1999)
    [8] H. Poth, Physics Report, 196: 135 (1990)
    [9] A. Hofmann, Tune Shifts from Self Fields and Images, in CAS - CERN Accelerator School: 5th General Accelerator Physics Course, edited by S. Turner (Jyvskyl: CERN, 1994), p. 329348
    [10] A. V. Smirnov, I. Meshkov, A. O. Sidorin et al, Necessary Condition for Beam Ordering, in Proceedings of COOL'07, edited by Volker RW Schaa (Bad Kreuznach: GSI, 2007), p. 87
    [11] A. O. Sidorin, I. N. Meshkov, I. A. Seleznev et al, Nuclear Instruments and Methods in Physics Research Section A, 558: 325 (2006)
    [12] V. V. Parkhomchuk, Nuclear Instruments and Methods in Physics Research Section A, 441: 9 (2000)
    [13] L. J. Mao, J. C.Yang, J. W. Xia et al, Nuclear Instruments and Methods in Physics Research Section A, 786: 91 (2015)
    [14] A. Piwinski, Synchro-betatron resonances, in CAS - CERN Accelerator School: Advanced Accelerator Physics, edited by S. Turner (Oxford: CERN, 1987), p. 187202
    [15] M. Martini, CERN preprint, CERN-PS-84-9-AA/27
    [16] J.D. Bjorken, S. Mtingwa, Particle Accelerators, 13: 115 (1983)
    [17] S. Abeyratne et al, arXiv:1209.0757

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Guo-Dong Shen, Jian-Cheng Yang, Jia-Wen Xia, Li-Jun Mao, Da-Yu Yin, Wei-Ping Chai, Jian Shi, Li-Na Sheng, A.Smirnov, Bo Wu and He Zhao. Injection method of barrier bucket supported by off-aligned electron cooling for CRing of HIAF[J]. Chinese Physics C, 2016, 40(8): 087004. doi: 10.1088/1674-1137/40/8/087004
Guo-Dong Shen, Jian-Cheng Yang, Jia-Wen Xia, Li-Jun Mao, Da-Yu Yin, Wei-Ping Chai, Jian Shi, Li-Na Sheng, A.Smirnov, Bo Wu and He Zhao. Injection method of barrier bucket supported by off-aligned electron cooling for CRing of HIAF[J]. Chinese Physics C, 2016, 40(8): 087004.  doi: 10.1088/1674-1137/40/8/087004 shu
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Received: 2016-01-05
Revised: 2016-03-22
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    Supported by New Interdisciplinary and Advanced Pilot Fund of Chinese Academy of Sciences

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Injection method of barrier bucket supported by off-aligned electron cooling for CRing of HIAF

    Corresponding author: Guo-Dong Shen,
  • 1. Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China
  • 2. University of Chinese Academy of Sciences, Beijing 100049, China
  • 3.  Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China
  • 4.  Joint Institute for Nuclear Research, Dubna 141980, Russian Federation
  • Received Date: 2016-01-05
  • Accepted Date: 2016-03-22
  • Available Online: 2016-08-05
Fund Project:  Supported by New Interdisciplinary and Advanced Pilot Fund of Chinese Academy of Sciences

Abstract: A new accelerator complex, HIAF (the High Intensity Heavy Ion Accelerator Facility), has been approved in China. It is designed to provide intense primary and radioactive ion beams for research in high energy density physics, nuclear physics, atomic physics as well as other applications. In order to achieve a high intensity of up to 5×1011 ppp 238U34+, the Compression Ring (CRing) needs to stack more than 5 bunches transferred from the Booster Ring (BRing). However, the normal bucket to bucket injection scheme can only achieve an intensity gain of 2, so an injection method, fixed barrier bucket (BB) supported by electron cooling, is proposed. To suppress the severe space charge effect during the stacking process, off-alignment is adopted in the cooler to control the transverse emittance. In this paper, simulation and optimization with the BETACOOL program are presented.

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