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

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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°.

References

[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.

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Received: 2006-07-11
Revised: 2006-08-28

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1.
沈阳化工大学材料科学与工程学院沈阳 110142

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°.