Optimization of the collimation system for CSNS/RCS with the robust conjugate direction search algorithm

  • The Robust Conjugate Direction Search (RCDS) method is used to optimize the collimation system for the Rapid Cycling Synchrotron (RCS) of the China Spallation Neutron Source (CSNS). The parameters of secondary collimators are optimized for a better performance of the collimation system. To improve the efficiency of the optimization, the Objective Ring Beam Injection and Tracking (ORBIT) parallel module combined with MATLAB parallel computing is used, which can run multiple ORBIT instances simultaneously. This study presents a way to find an optimal parameter combination of the secondary collimators for a machine model in preparation for CSNS/RCS commissioning.
      PCAS:
    • 29.25.Dz(Neutron sources)
    • 29.27.-a(Beams in particle accelerators)
    • 41.85.Si(Particle beam collimators, monochromators)
  • [1] CSNS Project Team. China Spallation Neutron Source Feasibility Research Report. Institute of High Energy Physics and Institute of Physics, Chinese Academy of Sciences, (2009) (in Chinese)
    [2] J. Wei, H. S. Chen, Y. W. Chen et al, Nucl. Instrum. Methods Phys. Res., Sect. A, 600:10-13(2009)
    [3] S. Wang, S. X. Fang, S. N. Fu et al, Chin. Phys. C, 33(S2):1-3(2009)
    [4] J. Wei, S. N. Fu, J. Y. Tang et al, Chin. Phys. C, 33(11):1033-1042(2009)
    [5] M. Y. Huang, S. Wang, J. Qiu et al, Chin. Phys. C, 37(6):067001(2013)
    [6] J. Y. Tang, J. Qiu, S. Wang et al, Chin. Phys. C, 30(12):1184-1189(2006)
    [7] S. Y. Xu and S. Wang, Chin. Phys. C, 35(12):1152-1158(2011)
    [8] S. Y. Xu and S. Wang, Chin. Phys. C, 36(2):160-166(2012)
    [9] N. Catalan-Lasheras et al, Beam Loss and Collimation at SNS Ring, in Proceedings of the Seventh ICFA Mini-Workshop on High Intensity High Brightness Hadron Beams, (Lake Como, Wisconsin, 1999)
    [10] T. Wei, Q. Qin, Nucl. Instrum. Methods Phys. Res., Sect. A, 566:212-217(2006)
    [11] N. Wang, M. Y. Huang, S. Y. Xu et al, Optimization of the Collimation System for the CSNS/RCS, in Proceedings of IPAC2012 (New Orleans, Louisiana, USA. 2012), p. 538-540
    [12] J. Galambos et al, ORBIT Use's Manual V.1.0, SNS-ORNL-AP Technical Note 11, March 1999
    [13] J. A. Holmes et al, Dynamic Space Charge Calculations for High Intensity Beams in Rings, in Proceedings of the ICAP (1998)
    [14] X. B. Huang, J. Corbett, J. Safranek et al, Nucl. Instrum. Methods Phys. Res., Sect. A, 726:77-83(2013)
    [15] X. B. Huang and J. Safranek, Phys. Rev. ST Accel. Beams, 18:084001(2015)
    [16] H. F. Ji, Y. Jiao, S. Wang et al, Chin. Phys. C, 39(12):127006(2015)
    [17] N. Wang, S. Wang, N. Huang et al, The Design of Beam Collimation system for CSNS/RCS, in Proceedings of HB2010 (Morschach, Switzerland 2010), p. 572-575
    [18] H. Grote and F. C. Iselin, The MAD Program Version 8.19 User's Reference Manual, CERN/SL/90-13(AP), 1996
  • [1] CSNS Project Team. China Spallation Neutron Source Feasibility Research Report. Institute of High Energy Physics and Institute of Physics, Chinese Academy of Sciences, (2009) (in Chinese)
    [2] J. Wei, H. S. Chen, Y. W. Chen et al, Nucl. Instrum. Methods Phys. Res., Sect. A, 600:10-13(2009)
    [3] S. Wang, S. X. Fang, S. N. Fu et al, Chin. Phys. C, 33(S2):1-3(2009)
    [4] J. Wei, S. N. Fu, J. Y. Tang et al, Chin. Phys. C, 33(11):1033-1042(2009)
    [5] M. Y. Huang, S. Wang, J. Qiu et al, Chin. Phys. C, 37(6):067001(2013)
    [6] J. Y. Tang, J. Qiu, S. Wang et al, Chin. Phys. C, 30(12):1184-1189(2006)
    [7] S. Y. Xu and S. Wang, Chin. Phys. C, 35(12):1152-1158(2011)
    [8] S. Y. Xu and S. Wang, Chin. Phys. C, 36(2):160-166(2012)
    [9] N. Catalan-Lasheras et al, Beam Loss and Collimation at SNS Ring, in Proceedings of the Seventh ICFA Mini-Workshop on High Intensity High Brightness Hadron Beams, (Lake Como, Wisconsin, 1999)
    [10] T. Wei, Q. Qin, Nucl. Instrum. Methods Phys. Res., Sect. A, 566:212-217(2006)
    [11] N. Wang, M. Y. Huang, S. Y. Xu et al, Optimization of the Collimation System for the CSNS/RCS, in Proceedings of IPAC2012 (New Orleans, Louisiana, USA. 2012), p. 538-540
    [12] J. Galambos et al, ORBIT Use's Manual V.1.0, SNS-ORNL-AP Technical Note 11, March 1999
    [13] J. A. Holmes et al, Dynamic Space Charge Calculations for High Intensity Beams in Rings, in Proceedings of the ICAP (1998)
    [14] X. B. Huang, J. Corbett, J. Safranek et al, Nucl. Instrum. Methods Phys. Res., Sect. A, 726:77-83(2013)
    [15] X. B. Huang and J. Safranek, Phys. Rev. ST Accel. Beams, 18:084001(2015)
    [16] H. F. Ji, Y. Jiao, S. Wang et al, Chin. Phys. C, 39(12):127006(2015)
    [17] N. Wang, S. Wang, N. Huang et al, The Design of Beam Collimation system for CSNS/RCS, in Proceedings of HB2010 (Morschach, Switzerland 2010), p. 572-575
    [18] H. Grote and F. C. Iselin, The MAD Program Version 8.19 User's Reference Manual, CERN/SL/90-13(AP), 1996
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3. Huang, L., Liu, H., Li, M. et al. Longitudinal dynamics study and optimization in the beam commissioning of the rapid cycling synchrotron in the China Spallation Neutron Source[J]. Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 2021. doi: 10.1016/j.nima.2021.165204
4. Zhong, L., Hu, Y., Tu, X. et al. EPICS Based Distributed Beam Optimization Framework in HUSTFEL Control System[J]. 2021. doi: 10.1109/CIYCEE53554.2021.9676804
5. Zou, Y., Xing, Q.-Z., Wang, B.-C. et al. Application of the asynchronous advantage actor–critic machine learning algorithm to real-time accelerator tuning[J]. Nuclear Science and Techniques, 2019, 30(10): 158. doi: 10.1007/s41365-019-0668-1
Get Citation
Hong-Fei Ji, Yi Jiao, Ming-Yang Huang, Shou-Yan Xu, Na Wang and Sheng Wang. Optimization of the collimation system for CSNS/RCS with the robust conjugate direction search algorithm[J]. Chinese Physics C, 2016, 40(9): 097006. doi: 10.1088/1674-1137/40/9/097006
Hong-Fei Ji, Yi Jiao, Ming-Yang Huang, Shou-Yan Xu, Na Wang and Sheng Wang. Optimization of the collimation system for CSNS/RCS with the robust conjugate direction search algorithm[J]. Chinese Physics C, 2016, 40(9): 097006.  doi: 10.1088/1674-1137/40/9/097006 shu
Milestone
Received: 2016-03-29
Revised: 2016-05-03
Fund

    Supported by National Natural Science Foundation of China (11475202, 11405187, 11205185) and Youth Innovation Promotion Association of Chinese Academy of Sciences (2015009)

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Optimization of the collimation system for CSNS/RCS with the robust conjugate direction search algorithm

    Corresponding author: Sheng Wang,
Fund Project:  Supported by National Natural Science Foundation of China (11475202, 11405187, 11205185) and Youth Innovation Promotion Association of Chinese Academy of Sciences (2015009)

Abstract: The Robust Conjugate Direction Search (RCDS) method is used to optimize the collimation system for the Rapid Cycling Synchrotron (RCS) of the China Spallation Neutron Source (CSNS). The parameters of secondary collimators are optimized for a better performance of the collimation system. To improve the efficiency of the optimization, the Objective Ring Beam Injection and Tracking (ORBIT) parallel module combined with MATLAB parallel computing is used, which can run multiple ORBIT instances simultaneously. This study presents a way to find an optimal parameter combination of the secondary collimators for a machine model in preparation for CSNS/RCS commissioning.

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