Design and Implementation of Control System for TPS Pulsed Magnet Power Supply

The Taiwan Photon Source (TPS) is the latest-generation 3-GeV synchrotron light source. A pulsed magnet power supply system to control injection and extraction of the electron beam has been designed and implemented. The experimental physics and industrial control system (EPICS)-embedded programmable logic controllers were developed to control the power supply for pulsed magnets. The system comprises various input/output modules and a CPU module with a built-in Ethernet interface. The control information (status of the power supply, on, off, warning, reset, read/set voltage, etc.) is remotely accessible with EPICS client tools. The TPS timing system provides trigger signals to synchronous power supply of the pulsed magnets. Ethernet-based oscilloscopes with EPICS support are employed to observe the current transformer waveforms of the pulsed magnet power supply. The implemented control system of this power supply satisfies complete system integration, rich graphical user interfaces, and useful diagnostic tools. It has been running with no downtime since mid-2014, which indicates high reliability. This paper describes the design of the control system, the synchronous trigger system, the real-time monitoring system, and the operational interfaces for the TPS pulsed magnet power supply.