High Sensitivity Beam Phase Measurement System for Isochronous Cyclotron

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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

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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