Design of Synchronized Pulse Signals for Bump Magnet Power Supply with FPGA-Based System

A new in-house pulse generator for bump magnet power supply at Siam Photon Source (SPS), a synchrotron light source managed by Synchrotron Light Research Institute (SLRI) in Thailand, has been designed with the Field Programmable Gate Arrays (FPGA)-based system for replacing the malfunctioning previous module. The power supply is required to generate synchronized current outputs of approximately 3 kA maximum for the bump magnets in the precise time from the timing system in which the trigger pulses are applied to create events of magnets in SPS. Particularly, the pulse width of 1.2 mu s from the timing system is designed to operate the three bump magnets for beam injection into the storage ring. Therefore, the FPGA pulse generator is proposed to detect the trigger pulses from the main timing system with its real-time capability of the FPGA board to obtain the output pulses in the specific widths and individual delay time to the bump magnet power supply. This paper presents the design and the experimental results of the pulse generator, which demonstrates the excellent performance of this equipment leading to the accomplishment of beam injection for the SPS.