Numerical simulation of high power microwave breakdown on dielectric surface at different gas pressures

被引：0
|
作者：
Cai L. [1 ]
Wang J. [1 ]
Zhu X. [1 ]
机构：
[1] Northwest Institute of Nuclear Technology, Xi'an 710024
来源：
Qiangjiguang Yu Lizishu/High Power Laser and Particle Beams | 2010年 / 22卷 / 10期
关键词：
Dielectric surface breakdown; High power microwave; Multipactor; Particle in cell-Monte Carlo collisions;
D O I：
10.3788/HPLPB20102210.2363
中图分类号：
学科分类号：
摘要：
This paper presents the electrostatic particle-in-cell(PIC) Monte Carlo collisions(MCC) method for simulating the breakdown on dielectric surface illuminated by high-power microwaves, and the dielectric surface breakdown at different pressures in argon is simulated by the PIC-MCC code. The temporal evolution of the number of particles and the mean kinetic energy of electrons, and the breakdown delay time are obtained. The simulation results show that, in the case of low pressure, the influence of multipactor is visible, while the number of electrons increases slowly after saturation and the breakdown delay is long. As the pressure increases, the influence of multipactor becomes smaller with gas ionization starting to dominate the breakdown process, and the breakdown delay gradually becomes shorter. In the case of high pressure, the dielectric surface is negative due to the absorption of the electrons, multipactor disappears and the breakdown delay is decided by the collisional ionization.
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页码：2363 / 2368
页数：5
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