赝火花开关放电的蒙特卡罗粒子模拟

采用粒子模拟和蒙特卡罗相结合的方法,应用静电求解模型,对赝火花开关初始放电过程进行了模拟。赝火花开关初始放电过程主要由汤森放电过程、等离子体形成、空心阴极效应和场致发射引发主放电组成;等离子体形成和空心阴极效应对赝火花开关的发展导通具有至关重要的作用。改变赝火花开关工作参数,如气压、电极孔径、阳极电压和阴极腔中初始粒子密度,研究其对赝火花开关电子峰值电流形成时间的影响。结果表明:随着气压、电极孔径、阳极电压和初始粒子密度的增大,赝火花开关电子峰值电流形成时间减小。

Particle-in-cell simulation of pseudospark switch based on particle-in-cell plus Monte-Carlo collision method

The initial discharge process of pseudospark switch has been simulated via a electrostatic particle-in-cell plus Monte-Carlo collision method.The pseudospark discharge process mainly consists of Townsend process,plasma formation,hollow cathode effect and main discharge induced by field emission.The plasma formation and hollow cathode effect are critical for the conduction.Then the parameters,i.e.gas pressure,electrode borehole diameter,anode voltage and initial particle density,were varied and their effect ...