Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
271635 | Fusion Engineering and Design | 2014 | 5 Pages |
•The timing system achieved tree structured timing network with only one type of timing module.•This system is integrated into J-TEXT COADC which is an EPICS based control system.•This system handles multiple timing sequences and events.•This system has been deployed on J-TEXT and working properly in daily experiments.
This paper describes the timing system designed to control the operation time-sequence and to generate clocks for various sub-systems on J-TEXT tokamak. The J-TEXT timing system is organized as a distributed system which is connected by a tree-structured optical fiber network. It can generate delayed triggers and gate signals (0 μs–4000 s), while providing reference clocks for other sub-systems. Besides, it provides event handling and timestamping functions. It is integrated into the J-TEXT Control, Data Access and Communication (J-TEXT CODAC) system, and it can be monitored and configured by Experimental Physics and Industrial Control System (EPICS). The configuration of this system including tree-structured network is managed in XML files by dedicated management software. This system has already been deployed on J-TEXT tokamak and it is serving J-TEXT in daily experiments.