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Zhao, L.Y.

Paper Title Page
FR5REP010 Event-Based Timing and Control System for Fast Beam-Mode Switching at KEK 8-GeV Linac 4797
 
  • K. Furukawa, M. Satoh, T. Suwada
    KEK, Ibaraki
  • A. Kazakov
    Sokendai, Ibaraki
  • T. Kudou, S. Kusano
    MELCO SC, Tsukuba
  • L.Y. Zhao
    SINAP, Shanghai
  
 

The 8-GeV linac at KEK provides electrons and positrons to several accelerator facilities. A 50-Hz beam-mode switching system has been constructed to realize simultaneous top-up injections for Photon Factory and the KEKB high- and low-energy rings, which require different beam characteristics. An event-based timing and control system was built to change the parameters of various accelerator components within 20 ms. The components are spread over a 600-m linac and require changes to a total of 100 timing and control parameters. The system has been operated successfully since the autumn of 2008 and has been improved upon as beam operation experience has been accumulated. It is expected to enhance the quality of the experiments at KEKB and PF. We describe the details of this new and improved control system and present status of the accelerator operation.