Construction of the Phasing System for BEPCⅡ Linac

HOU Mi; GENG Zhe-Qiao

Chinese Physics C> 2007, Vol. 31> Issue(4) : 391-394

Construction of the Phasing System for BEPCⅡ Linac

HOU Mi ^, ,
GENG Zhe-Qiao

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

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Abstract：
In order to get high beam quality, a RF distribution system is required, with minimal phase drifts and errors in the BEPCⅡ linac. The additional installation of phase reference cables and monitoring equipments and stable RF distribution for BEPC linac are finished. The master oscillator is chosen to offer RF signal with low phase noise and a stable phase distribution system is built to deliver RF signal to each klystron. A phase and amplitude detector is constructed to measure the phase precisely and an IΦA unit is used for a phase shifter. Control software based on EPICS is used to connect all the units of the system, and a phasing method based on BPM is adopted to optimize the phase of each klystron. Now the phasing system is installed and tested in the klystron gallery of the BEPCⅡ linac.

References

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. PEI Guo-Xi. Overview of BEPC/ Linac Design. In:Po-hang Accelerator Laboratory. Proceedings of LINAC 2002.Pohang: Pohang Accelerator Laboratory, 2002. 49-51.2. GU Peng-Da et al. HEP NP, 2005, 29(3): 316-320.(in Chinese)(顾鹏达等.高能物理与核物理,2005, 29(3): 316-320)3. Geng Zhe-Qiao et al. HEP NP, 2006, 30(2): 151-154.(in Chinese)(耿哲娇等.高能物理与核物理,2006, 30(2): 151-154)4. Neal R B et al. The Stanford Two-Mile Accelerator. W. A.Benjamin, Inc, New York Amsterdam, 1968. 383-409.

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HOU Mi and GENG Zhe-Qiao. Construction of the Phasing System for BEPCⅡ Linac[J]. Chinese Physics C, 2007, 31(4): 391-394.

HOU Mi and GENG Zhe-Qiao. Construction of the Phasing System for BEPCⅡ Linac[J]. Chinese Physics C, 2007, 31(4): 391-394. shu

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Received: 2006-07-26
Revised: 2006-08-18

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沈阳化工大学材料科学与工程学院沈阳 110142

Construction of the Phasing System for BEPCⅡ Linac

HOU Mi ^,
GENG Zhe-Qiao

Corresponding author: HOU Mi,

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

Received Date: 2006-07-26
Accepted Date: 2006-08-18
Available Online: 2007-04-05

Abstract: In order to get high beam quality, a RF distribution system is required, with minimal phase drifts and errors in the BEPCⅡ linac. The additional installation of phase reference cables and monitoring equipments and stable RF distribution for BEPC linac are finished. The master oscillator is chosen to offer RF signal with low phase noise and a stable phase distribution system is built to deliver RF signal to each klystron. A phase and amplitude detector is constructed to measure the phase precisely and an IΦA unit is used for a phase shifter. Control software based on EPICS is used to connect all the units of the system, and a phasing method based on BPM is adopted to optimize the phase of each klystron. Now the phasing system is installed and tested in the klystron gallery of the BEPCⅡ linac.