Construction of the Phasing System for BEPCⅡ Linac

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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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Construction of the Phasing System for BEPCⅡ Linac

    Corresponding author: HOU Mi,
  • Institute of High Energy Physics, CAS, Beijing 100049, China

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.

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