PAD Design for the Phasing System of BEPCⅡ Linac

GEN Zhe-Qiao; HOU Mi; PEI Guo-Xi

Chinese Physics C> 2006, Vol. 30> Issue(2) : 151-154

PAD Design for the Phasing System of BEPCⅡ Linac

Institute of High Energy Physics, CAS, Beijing 100049, China

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Abstract：
Phase and amplitude measurement is one of the most important issues for the phasing system of BEPCⅡ linac. Two kinds of PAD, based on analog and digital I/Q demodulator respectively, have been constructed and tested in both laboratory and the klystron gallery of BEPCⅡ linac. A calibration algorithm based on LMS method is used to compensate the mismatches of the analog I/Q demodulator. Experiments show that both kinds of PAD run stably and can meet the requirements of the phasing system.

References

[1]

. PEI Guo-Xi. Overview of BEPCⅡ Linac Design. In: Pohang Accelerator Laboratory. Proceedings of LINAC 2002.Pohang: Pohang Accelerator Laboratory, 2002. 49-512. GU Peng-Da et al. HEP NP, 2005, 29(3): 316-320 (in Chinese)(顾鹏达等.高能物理与核理2005, 29(3): 316-320)3. Sabah S, Lorenz R. Design and Calibration of IQ-Mixers.Proceedings of EPAC'98. Stockholm: Institute of Physics Publishing, 1998. 1589-15914. Ziomek C. Low Level RF Signal Processing Software. Stan-ford Linear Accelerator Center, NLCTA-Note-56. 1996, 2-65. Cavers J K, Liao M W. IEEE Transactions on Vehicular Technology. 1993, 42(4): 581-5886. Ziomek C, Corredoura P. Digital I/Q Demodulator. IEEE PAC95 Proceedings. Switzerland: IEEE, 1995. 2663-2665

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GEN Zhe-Qiao, HOU Mi and PEI Guo-Xi. PAD Design for the Phasing System of BEPCⅡ Linac[J]. Chinese Physics C, 2006, 30(2): 151-154.

GEN Zhe-Qiao, HOU Mi and PEI Guo-Xi. PAD Design for the Phasing System of BEPCⅡ Linac[J]. Chinese Physics C, 2006, 30(2): 151-154. shu

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Received: 2005-05-30
Revised: 1900-01-01

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沈阳化工大学材料科学与工程学院沈阳 110142

PAD Design for the Phasing System of BEPCⅡ Linac

Corresponding author: GEN Zhe-Qiao,

Institute of High Energy Physics, CAS, Beijing 100049, China

Received Date: 2005-05-30
Accepted Date: 1900-01-01
Available Online: 2006-02-05

Abstract: Phase and amplitude measurement is one of the most important issues for the phasing system of BEPCⅡ linac. Two kinds of PAD, based on analog and digital I/Q demodulator respectively, have been constructed and tested in both laboratory and the klystron gallery of BEPCⅡ linac. A calibration algorithm based on LMS method is used to compensate the mismatches of the analog I/Q demodulator. Experiments show that both kinds of PAD run stably and can meet the requirements of the phasing system.