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Lin, K.K.

Paper Title Page
PM05 Functionality Enhancement of the Multiplexing BPM System in the Storage of SRRC 171
 
  • J. Chen, C.S. Chen, K.H. Hu, K.T. Hsu, C.H. Kuo, D. Lee, K.K. Lin
    SRRC, Synchrotron Radiation Research Center, Hsinchu, Taiwan, ROC
 
  An extension of existing multiplex BPM electronics to provide capability for turn-by-turn beam position and phase advance measurement is implemented. The system can be configured as turn-by-turn beam position measurement or phase advance and coupling measurement. For turn-by-turn mode, the system performed four consecutive measurements of four BPM buttons. Data acquisition is synchronize with beam excitation. Turn-by-turn beam position is reconstructed by these four independent measurements. This system was named as pseudo-turn-by-turn beam position monitor system (PTTBPM). Resonance excitation of the stored beam and adopting lock-in techniques can measure betatron phase and local coupling. Design considerations of the system and preliminary beam test results are presented in this report.