長パルス大電力ジャイロトロン用電源の制御と保護

概要

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A high power and long pulse gyrotron power supply is developed, adopting an a.c. GTO Switch, a regulator tube for fast switching and keeping the stable output voltage and a high speed interlock circuit. The a.c. GTO Switch protects the a.c. main circuit from an a.c. over current caused by a crowbar switch and reduces the anode loss of the regulator tube. The regulator tube for stabilizing the gyrotron cathode voltage and switching the current is controlled by the driver circuit which has a minimum number of characteristic roots. A pair of proportional and integral control is adopted into the feedback control to eliminate a disturbance of the tube. These methods enables us to attain the voltage stability of less than ±0.2% and switching time of 200μs, which is necessary for the gyrotron operation. The high speed interlock circuit realizes turn-off performance of 6μs and a reliable and safety operation of the gyrotron. This power supply has realized the long pulse gyrotron operation of 110GHz, 410kW, 1.3s.
社団法人プラズマ・核融合学会の論文
1994-09-25