外加磁场对微空心阴极放电的影响

Influence of external magnetic field on micro-hollow cathode discharge

采用C语言编程实现的三维系综蒙特卡罗模型研究了外加磁场对微空心阴极放电的影响。研究结果显示,当气体压强和外加电压保持不变时,在微空心阴极放电系统中加入外部磁场后,阴极方向电子密度分布变化不大,轴向和侧向电子漂移范围减小,电子能量向低能方向移动,但是外加磁场对高气压微空心阴极放电的影响整体上不如对低气压放电的影响明显。研究结果对于理解微空心阴极放电等离子体的机理具有一定的指导意义.

Three-dimensional ensemble Monte Carlo model is employed using C programming language to investigate the impact of different cathode aperture sizes to micro-hollow cathode discharges.Results show that in argon under constant pressure and voltage,when an external magnetic field is added in a microhollow cathode discharge,the distribution of electron density has not change much in cathode,and electron drift range reduces in the axial and lateral direction,and electron energy becomes lower.But the applied magnetic field has a less obvious effect on high-pressure micro-hollow cathode discharges than low-pressure discharges on the whole.The research results have a certain guiding significance on the mechanism of the micro-hollow cathode discharge plasma.