• X. Zheng, H.T. Hou, J.F. Liu, C. Luo, Zh.G. Zhang, S.J. Zhao
  SINAP, Shanghai
• Z.Q. Feng, Z. Li, D.Q. Mao, Y.B. Zhao, X. Zheng
  Shanghai KEY Laboratory of Cryogenics & Superconducting RF Technology, Shanghai

The digital low level radio frequency (DLLRF) system and the beam trip diagnostic system in the storage ring of Shanghai Synchrotron Radiation Facility (SSRF) have been operational for more than one year. The DLLRF has successfully maintained the amplitude and phase stability of the cavity field in the superconducting cavity even when the beam current in the storage ring reached 300mA at 3.5GeV, and the beam trip diagnostic system has been realized and is helpful for improving the reliability of the RF system.

• J.F. Liu, H.T. Hou, C. Luo, Zh.G. Zhang, S.J. Zhao
  SINAP, Shanghai
• Z.Q. Feng, Z. Li, D.Q. Mao, Y.B. Zhao, X. Zheng
  Shanghai KEY Laboratory of Cryogenics & Superconducting RF Technology, Shanghai

The superconducting RF system has been operated successfully in the storage ring of SSRF since July, 2008. The superconducting RF modules integrated with 310 kW transmitters and digital low level radio frequency (LLRF) control are adopted to provide about 4.5 MV cavity voltages to 3.5GeV electron beam. The operation status of SRF system is mainly reported here, the problems we met are analyzed, and the operation with normal conducting cavity systems is introduced briefly. The challenge for us is to improve the system reliability and machine performance.