Improvement of a timing system in J-PARC Linac/RCS

Sawabe, Yuki*; Takahashi, Hiroki  ; Ito, Yuichi*; Kawase, Masato*

In the timing system of J-PARC LINAC/RCS, the ring type Reflective Memory (RFM) network is adopted for data transfer. In June 2016, a data transfer failure occurred due to communication error on the RFM network, and it took a long time to recover. From this experience, we have created the environment to monitor of the RFM network status, and we duplicated the computer which manages the data transfer on the RFM network. In Addition, we have also created the syslog function as an environment to monitor each RFM even if data transfer failure occurs on the RFM network. After these improvements, a trouble occurred in the timing system VME. At the same time, the target device was immediately identified by these functions, and the timing system could be recovered quickly. In this paper, the details of improvement for stable operation in the timing system of J-PARC LINAC / RCS are presented.