磁気絶縁型ダイオードの連続動作特性

抄録

Characteristics of magnetically insulated diode (MID) in a multi-shot operation are evaluated experimentally. MID is operated at V_d_??_1.2MV. An ion current density (J_i) of 350A/cm² is observed at a first shot when diode gap is 5mm. J_i decreases with increasing the number of shot and at 7th shot J_i is decreased up to 150-350A/cm². After 7 shots, the surface of anode was observed and found that it is covered with sticked matter of metallic materials such as Zn, Al, Fe, Cu. By cleaning the surface of anode J_i was recovered to the initial value. From the fact, the decrease of J_i is due to that the anode is covered with the sticked matter, which prevents the growth of anode plasma.