中文摘要：

从微电流的角度分析激光触发真空开关（laser triggered vacuum switch,LTVS）的触发特性。通过设计微电流测试电路,在开关两端施加一定的电压,施加电压值不能使开关导通,这样可以更好的分析开关导通前,开关内部初始等离子体的发展情况。通过实验发现,在双脉冲激光作用下,平面型LTVS的微电流随着施加电压的增加而增加,连续两次脉冲激光照射平面型LTVS的目标材料,产生更多的初始等离子体。结果表明,双脉冲激光的触发模式,有利于降低开关导通所需的触发能量,微电流的产生是ns级,使得开关可以高速稳定的导通,从而有利于开关整体装置的小型化与实用化设计。

英文摘要：

The triggering characteristics of LTVS （laser triggered vacuum switch, LTVS）were analyzed in the view of micro-current. A micro-current test circuit was designed, and a constant voltage, which is unable to turn on the switch, was applied on the switch to analyze the development of initial plasma within the switch before it turned on. The experiment revealed that under the effect of dual-pulse laser, the micro-current of flat-type LTVS increased with the increase in the applied voltage, and continuous twice irradiation of pulsed laser on the target material of the flat-type LTVS produced more initial plasma, so that the conduction time delay and jitter time delay of the switch reached nanosecond level. The result shows the dual-pulse laser trigger mode is beneficial to reduction of the triggering energy required for conduction of the switch, and the mode also contributes to the miniaturization of the overall switch device and its practical design.