Simulation model for design of a new power supply

新しい電源開発用のシミュレーションモデル

高柳 智弘   ; 林 直樹  ; 植野 智晶; 富樫 智人; 入江 吉郎*

Takayanagi, Tomohiro; Hayashi, Naoki; Ueno, Tomoaki; Togashi, Tomohito; Irie, Yoshiro*

J-PARC 3GeV RCSのバンプシステムの新しい電源開発用のシミュレーションモデルを構築した。これは、ビーム入射用パルス電源のこれまでのトラブル時の原因調査及び対策の経験をもとに、電源の改良点と保守時間の短縮を検討できるモデルである。そして、このモデルを使用したノイズを低減する電源の開発について報告する。

The simulation model for a new power supply of the injection bump system magnets of the 3-GeV RCS in J-PARC has been constructed. The new power supply requires the reduction of the ripple noise current which will resonate with load and excites a forced beam oscillation at the injection stage. In order to incorporate the load impedance in the simulation model, the impedances of a feeder line and the bump magnet with a ceramic vacuum chamber inside were measured. The RF shield is formed on the ceramic surface along the beam direction. The results were analyzed using the OPERA-3D and the circuit simulation code, Micro-Cap. A good agreement with measured was obtained.