Demonstration of Rapid Electrical Recovery in Repetitive Operation of a Counter-Facing Plasma-Focus Device

抄録

Two plasma-focus electrodes, consisting of a pair of counter-facing center electrodes surrounded by six outer electrodes, can sustain a long-life, high-energy-density (HED) plasma initiated by laser-triggered multi-channel discharges. With the goal of making a high-average-power plasma device, we investigated the repetition rate of this device. Double-pulse experiments showed that when the device was driven with positive polarity, in which the center electrodes were biased at a positive voltage, the time required for the device to return to a non-conducting state was less than 100 µs, regardless of the operating voltage. The device thus has a repetition rate of more than 10 kHz.