Generation of Pulsed Power by Opening Switch with Laser-Produced Plasma

传统的脉冲发电机是一个巨大的机器，它由马克思电池和水电容器组成。对于许多研究人员来说，使用这个系统非常困难。我们利用感应式储能系统，开发了体积小、重量轻的脉冲发电机。铜熔断器是电感式脉冲发电机必不可少的开断开关。然而，脉冲发电机的重复运行是一个难题。本研究的目的是研究使用激光等离子体的感应脉冲电源发生器的重复操作。(1)利用激光产生的等离子体的开路开关能够中断几十毫纳秒内的大电流。(2)碳靶射出的中性气体，激光聚焦在其上，对中断大电流具有重要作用。(3)实现了10pps的重复操作。(4)利用激光产生的等离子体进行开路开关的脉冲功率发生器，可运行几十万次而无需维护。

The conventional pulsed power generator, which is composed of the Marx bank and the water capacitor, is a huge machine. It is very difficult for many researchers to use that system. We have developed the pulsed power generator, which is compact and light-weight, using an inductive energy storage system. The copper fuse has been used as an opening switch, which is necessary for the inductive pulsed power generator. However, the repetitive operation of pulsed power generator is difficult.The aim of this rescarch is to investigate the repetitive operation of the inductive pulsed power generator using laser-produced plasma.(1) The opening switch using laser-produced plasma is able to interrupt a high current within several ten's ns.(2) The neutral gas ejected from a carbon target, on which the laser light is focused, has an important role to interrupt a high current.(3) A repetitive operation of 10 pps was achieved.(4) The pulsed power generator with the opening switch using laser-producted plasma is able to be operated several hundred thousand shots without maintenance.