Development of a feedback control system for resonant power supplies in J-PARC 3-GeV synchrotron

J-PARC3GeVシンクロトロンにおける共振電源フィードバック制御システムの開発

渡辺 泰広  ; 谷 教夫  ; 安達 利一*; 五十嵐 進*; 染谷 宏彦*

Watanabe, Yasuhiro; Tani, Norio; Adachi, Toshikazu*; Igarashi, Susumu*; Someya, Hirohiko*

In the J-PARC 3-GeV Synchrotron, dipole magnets and 7 families of quadrupole magnets are excited with a DC-biased 25 Hz sinusoidal waveforms using a individual resonant circuits. This paper proposed a feedback system to improve the amplitude and phase stability, specially against variation of capacitance caused by temperature characteristics in resonant circuits. The control system has been successfully demonstrated and achieved amplitude and phase stability under 0.005% and 1 uS, respectivity.