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Furuya, T.

Paper Title Page
TUPCH057 A Diagnostic System for Beam Abort at KEKB 1139
 
  • H. Ikeda, K. Akai, J.W. Flanagan, T. Furuya, S. Hiramatsu, M. Suetake, Y. Suetsugu, M. Tobiyama, T. Tsuboyama
    KEK, Ibaraki
  • S. Stanic
    Tsukuba University, Ibaraki
 
  A controlled beam abort system has been installed at KEKB for the protection of the hardware components of the accelerator and detector from damage by ampere-class beam currents. In order to identify the reason for each abort and optimize the abort system to handle each type of problem as well as improve machine operation, a diagnostic system has been developed. Fast signals, such as beam currents, accelerating voltages of the RF cavities and beam loss monitor signals from PIN photo-diodes are recorded and analyzed by a data logger system with a high sampling rate at the moment of each abort. Beam oscillations, radiation dose at the detector and vacuum pressure are also examined to classify the reasons for beam loss and aborts. Statistics and typical examples of these aborts will be discussed.