Design and implementation of T0 signal monitoring system of CSNS multi-physical spectrometer

Abstract

Background The high accuracy and high stability of the T0 signal, taking from initial proton target time, are the prerequisite and basis for the efficient operation of the multi-physics spectrometer of Chinese spallation neutron source (CSNS). Purpose This study aims to develop a set of CSNS multi-physical spectrometer T0 trigger monitor system running on the experimental physics and industrial control system (EPICS) platform. Methods First of all, the T0 signal was fed into the T0 fan out device for high precise time stamp marking, and the high-throughput distributed publish-subscribe messaging system Kafka was used to achieve peak-shaving and asynchronous communication of big data traffic. Then, the monitored data was uploaded to the EPICS platform as a process variable (PV), and the Open-Falcon monitoring system and the visualization tool Grafana were used to realize the monitoring and visualization of the data. Results & Conclusions Implemented T0 signal monitoring system can monitor the frequency of the T0 signal of each node and the time delay of T0 in the fan-out and transmission process in real time. so as to ensure the normal operation of the CSNS multi-physics spectrometer.

Keywords

• t0 signal
• epics
• kafka
• monitoring
• chinese spallation neutron source