微波磁场和斜入射对介质表面次级电子倍增的影响

Effects of the microwave magnetic field and oblique incident microwave on multipactor discharge on a dielectric surface

分别研究了微波磁场和斜入射微波电场对介质表面次级电子倍增的影响.利用particle-in-cell/Monte Carlo方法,获得了微波磁场和斜入射微波电场条件下电子数量、介质表面直流场、电子平均能量和介质表面吸收功率的时间变化图像.模拟结果表明,斜入射和微波磁场虽然会显著影响电子的平均能量,但对电子数量和介质表面吸收功率的影响并不大,因此不会对微波介质表面击穿产生太大作用.

We analyze, separately, the effects of the microwave magnetic field and the oblique microwave field on multipactor discharge on a dielectric surface. Using particle-in-cell/Monte Carlo simulation, we obtain the temporal evolution of the number of electrons, direct current electric field, mean kinetic energy of electrons,and power deposited in the dielectric in the cases of the microwave magnetic field and the oblique microwave field. The numerical results show that the oblique microwave field and the microwave magnetic field can significantly affect the mean kinetic energy of electrons, but do not qualitatively change the number of electrons and the power deposited in the dielectric, so the microwave magnetic field and the oblique microwave field do not significantly affect the multipactor.