SiC-based semiconductor switch power supply for kicker magnets

Takayanagi, Tomohiro   ; Ono, Ayato; Horino, Koki*; Ueno, Tomoaki*; Sugita, Moe ; Kinsho, Michikazu  ; Tokuchi, Akira*; Ikoma, Naoya*; Nakata, Kyosuke*; Kamezaki, Hiroaki*; Sumida, Hiroyuki*

The kicker system used for injection and extraction of accelerated beams requires a pulsed power supply with high speed and high repetition rate of short pulses acting only on a specified bunch of beams. We have developed a semiconductor switch power supply with a rated output of 40kV/2kA using SiC-MOSFETs, one of the next-generation power semiconductors. Then, we reconfigured this semiconductor switch power supply into two units with 20kV/2kA output and conducted energization tests using an actual kicker electromagnet. It was also demonstrated with magnetic field waveforms that the flat-top correction function of this power supply can suppress ringing in the waveform by less than half. This achievement enables the reduction of the kick angle difference caused by ringing, which is a factor in beam loss. In the presentation, specifications, test equipment, and evaluation results of the developed SiC semiconductor switch power supply will be reported.