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Chinese Physics C> 2015, Vol. 39> Issue(5) : 057008 DOI: 10.1088/1674-1137/39/5/057008

Status of CSNS H- ion source

  • A new H- ion source has been installed successfully and will be used to serve the China Spallation Neutron Source (CSNS). In this paper, we report various components of the ion source, including the discharge chamber, temperature, cooling system, extraction electrodes, analyzing magnet, remote control system and so on. Compared to the previous experimental ion source, some improvements have been made to make the ion source more compact and convenient. In the present arrangement, the Penning field is generated by a pair of pole tip extensions on the 90° analyzing magnet instead of by a separate circuit. For the remote control system, F3RP61-2L is applied to the accelerator online control system for the first time. In the running of the ion source, a stable pulse H- beam with a current of 50 mA at an energy of 50 keV is produced. The extraction frequency and pulse width is 25 Hz and 500 μs, respectively. Furthermore, an emittance scanner has been installed and measurements are in progress.
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    [1] ZHANG Jie. National Key ST Infrastructure Projects, 2006, 21(5): 415 (in Chinese)[2] WU Xiao-Bing, OUYANG Hua-Fu, CHI Yun-Long et al. Chinese Physics C, 2011, 35(7): 679[3] Dudnikov V G. Surface Plasma Source of Penning Geometer. In: Proceeding of the Fourth All-union Conference on Charge Particle Accelerators. Moscow, 1974 (NAUKA, Moscow, 1975), 1: 323[4] Lettry J, Alessi J, Faircloth D et al. Rev. Sci. Inst., 2012, 83: 02A728[5] LU Yan-Hua, LI Gang, OUYANG Hua-Fu. Chinese Physics C, 2010, 34(12): 1883

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LIU Sheng-Jin, HUANG Tao, OUYANG Hua-Fu, ZHAO Fu-Xiang, XIAO Yong-Chuan, CAO Xiu-Xia, XUE Kang-Jia, ZHANG Jun-Song, XU Tao-Guang, LI Fang, LU Yan-Hua, LI Gang, YANG Lei, LI Yi and Status of CSNS H- ion source[J]. Chinese Physics C, 2015, 39(5): 057008. doi: 10.1088/1674-1137/39/5/057008
LIU Sheng-Jin, HUANG Tao, OUYANG Hua-Fu, ZHAO Fu-Xiang, XIAO Yong-Chuan, CAO Xiu-Xia, XUE Kang-Jia, ZHANG Jun-Song, XU Tao-Guang, LI Fang, LU Yan-Hua, LI Gang, YANG Lei, LI Yi and Status of CSNS H- ion source[J]. Chinese Physics C, 2015, 39(5): 057008.  doi: 10.1088/1674-1137/39/5/057008 shu
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Received: 2014-08-06
Revised: 2014-11-14
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Status of CSNS H- ion source

    Corresponding author: LIU Sheng-Jin,
  • Received Date: 2014-08-06
  • Accepted Date: 2014-11-14
  • Available Online: 2015-05-05

Abstract: A new H- ion source has been installed successfully and will be used to serve the China Spallation Neutron Source (CSNS). In this paper, we report various components of the ion source, including the discharge chamber, temperature, cooling system, extraction electrodes, analyzing magnet, remote control system and so on. Compared to the previous experimental ion source, some improvements have been made to make the ion source more compact and convenient. In the present arrangement, the Penning field is generated by a pair of pole tip extensions on the 90° analyzing magnet instead of by a separate circuit. For the remote control system, F3RP61-2L is applied to the accelerator online control system for the first time. In the running of the ion source, a stable pulse H- beam with a current of 50 mA at an energy of 50 keV is produced. The extraction frequency and pulse width is 25 Hz and 500 μs, respectively. Furthermore, an emittance scanner has been installed and measurements are in progress.

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