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Chinese Physics C> 2007, Vol. 31> Issue(3) : 303-306 

High Sensitivity Beam Phase Measurement System for Isochronous Cyclotron

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

  • The beam phase measurement system in the HIRFL is introduced. Based on the double-balanced mixer principle using rf-signal mixing and filtering techniques, a stable and sensitive phase measurement system has been developed. The phase history of the ion beam is detected by using a set of capacitive pick-up probes installed in the cyclotron. The phase information of the measurement is necessary for tuning to obtain a optimized isochronous magnetic field which induces to maximize the beam intensity and to optimize the beam quality. The result of the phase measurement is reliable and the accurancy reaches ±0.5°.
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    [1] . Brautigam W et al. IEEE Transactions on Nuclear Science,1979, NS-26(2): 2375-23782. Gustafsson J. Nuclear Instruments and Methods in Physics Research, 1993, A335: 417-4233. ZHENG Jian-Hua. Nuclear Electronics Detection Tech-nology, 2004, 24(6): 657 (in Chinese)(邓建华，核电子学与探测技术2004, 24(6): 657)4. Hiroro Yamazaki. Anti-interface Technology of Electronic Circuit. Beijing: Science Press, 1989 (in Chinese)(山崎弘郎，电子电路的抗干扰技术。北京：科学出版社, 1989)5. ZHENG Jian-Hua. Development of Beam Diagnostic Sys-tem for HIRFL. Proceedings of the 1997 International Con-ference on Accelerator and Large Experimental Physics Control Systems. Beijing, 1997. 3-7

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ZHENG Jian-Hua, LIU Wei, WANG Yi-Fang, WANG Yan-Mou, MA Wei-Nian, YIN Yan and SONG Hai-Hong. High Sensitivity Beam Phase Measurement System for Isochronous Cyclotron[J]. Chinese Physics C, 2007, 31(3): 303-306.
ZHENG Jian-Hua, LIU Wei, WANG Yi-Fang, WANG Yan-Mou, MA Wei-Nian, YIN Yan and SONG Hai-Hong. High Sensitivity Beam Phase Measurement System for Isochronous Cyclotron[J]. Chinese Physics C, 2007, 31(3): 303-306. shu
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Received: 2006-07-11
Revised: 2006-08-28
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High Sensitivity Beam Phase Measurement System for Isochronous Cyclotron

    Corresponding author: ZHENG Jian-Hua,
  • Institute of Modern Physics, Chinese Academy Sciences, Lanzhou 730000, China
  • Received Date: 2006-07-11
  • Accepted Date: 2006-08-28
  • Available Online: 2007-03-05

Abstract: The beam phase measurement system in the HIRFL is introduced. Based on the double-balanced mixer principle using rf-signal mixing and filtering techniques, a stable and sensitive phase measurement system has been developed. The phase history of the ion beam is detected by using a set of capacitive pick-up probes installed in the cyclotron. The phase information of the measurement is necessary for tuning to obtain a optimized isochronous magnetic field which induces to maximize the beam intensity and to optimize the beam quality. The result of the phase measurement is reliable and the accurancy reaches ±0.5°.

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