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- N. Kamikubota, N. Yamamoto
KEK, Ibaraki, Japan
- T. Iitsuka, S.Y. Yoshida
Kanto Information Service (KIS), Accelerator Group, Ibaraki, Japan
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The radiation monitoring system of J-PARC was constructed as a part of safety facilities. Thus, it has been operated independently from the main accelerator control system. In fact, the radiation monitoring system consists of two subsystems. The first subsystem developed by JAEA, which covers Linac and RCS ring, is PLC-based. We add a FL-net module to this subsystem to enable one-way data transfer to the accelerator control system. Here FL-net is a device-level communication network using UDP/IP, defined by a Japanese consortium. The second subsystem developed by KEK covers MR ring. It is a CAMAC-based DAQ system. Since this subsystem was difficult to extend, we made signal branches from radiation monitors, and fed them to a new PLC-based DAQ system. As same as the first subsystem, a FL-net module is used for one-way data transfer. In 2013-2014, integration of two subsystems has been carried out. Now radiation monitors can be supervised with the accelerator control system. As a result, accelerator operators can check radiation levels much easier than before. We understand that this is a significant improvement to realize safer operation of J-PARC accelerators.
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