Keyword: gun
Paper Title Other Keywords Page
WEMMU011 Radiation Safety Interlock System for SACLA (XFEL/SPring-8) radiation, electron, controls, network 710
  • M. Kago, T. Matsushita, N. Nariyama, C. Saji, R. Tanaka, A. Yamashita
    JASRI/SPring-8, Hyogo-ken, Japan
  • Y. Asano, T. Hara, T. Itoga, Y. Otake, H. Takebe
    RIKEN/SPring-8, Hyogo, Japan
  • H. Tanaka
    RIKEN SPring-8 Center, Sayo-cho, Sayo-gun, Hyogo, Japan
  The radiation safety interlock system for SACLA (XFEL/SPring-8) protects personnel from radiation hazards. The system controls access to the accelerator tunnel, monitors the status of safety equipment such as emergency stop buttons, and gives permission for accelerator operation. The special feature of the system is a fast beam termination when the system detects an unsafe state. A total beam termination time is required less than 16.6 ms (linac operation repetition cycle: 60 Hz). Especially important is the fast beam termination when the electron beams deviates from the proper transport route. Therefore, we developed optical modules in order to transmit a signal at a high speed for a long distance (an overall length of around 700 m). An exclusive system was installed for fast judgment of a proper beam route. It is independent from the main interlock system which manages access control and so on. The system achieved a response time of less than 7ms, which is sufficient for our demand. The construction of the system was completed in February 2011 and the system commenced operation in March 2011. We will report on the design of the system and its detailed performance.  
slides icon Slides WEMMU011 [0.555 MB]  
poster icon Poster WEMMU011 [0.571 MB]  
WEPMS013 Timing System of the Taiwan Photon Source timing, controls, injection, EPICS 999
  • C.Y. Wu, Y.-T. Chang, J. Chen, Y.-S. Cheng, P.C. Chiu, K.T. Hsu, K.H. Hu, C.H. Kuo, D. Lee, C.Y. Liao
    NSRRC, Hsinchu, Taiwan
  The timing system of the Taiwan Photon Source provides synchronization for electron gun, modulators of linac, pulse magnet power supplies, booster power supply ramp, bucket addressing of storage ring, diagnostic equipments, beamline gating signal for top-up injection. The system is based on an event distribution system that broadcasts the timing events over a optic fiber network, and decodes and processes them at the timing event receivers. The system supports uplink functionality which will be used for the fast interlock system to distribute signals like beam dump and post-mortem trigger with 10 μsec response time. The hardware of the event system is a new design that is based on 6U CompactPCI form factor. This paper describes the technical solution, the functionality of the system and some applications that are based on the timing system.