THE CONTROL SYSTEM OF THE MAIN MAGNET POWER SUPPLY IN NSRL

The control system of main magnet power supplies (PS) in NSRL electron storage ring is built upon the Experimental Physics and Industrial Control System (EPICS). Because PCs have become more and more popular in accelerator control, We use Industrial PC (IPC) as the low-level controller, i.e. front-end device controller (FDC). A total of 12 FDCs control a group of 12 PSs respectively. PSs are star connected to an Input / Output controller (IOC) via RS422. The IOC is an IPC on which vxWorks runs to meet the demand of EPICS. A SUN workstation is used as an OPI (Operator Interface) as well as an EPICS server.