Programmable Power Supply for AC Switching Magnet of Proton Accelerator

The 100 MeV PEFP (Proton Engineering Frontier Project) proton linac has two proton beam extraction lines for user experiment. Each extraction line has 5 beamlines and has 2.5 Hz operating frequency. An AC switching magnet is used to distribute the proton beam to the 5 beam-lines, An AC switching magnet is excited by PWM-controlled bipolar switching-mode converters. This converter is designed to operate at ± 350A, 2.5 Hz programmable current step output. The power supply is employed IGBT modules and has been controlled by a Digital Signal Processor (DSP). This paper describes the design and test results of the power supply.