物理学报Issue(19)：482-491,10.DOI:10.7498/aps.62.197901
介质窗横向电磁场分布下的次级电子倍增效应
Effects of transverse electromagnetic field distribution in the multipactor discharge on dielectric window surface
摘要
Abstract
By using a P3D3V PIC code programmed by the authors, the multipactor discharge effects on dielectric inner and outer surface under high-power microwave with TE10mode in the BJ32 rectangular waveguide are numerically studied. The electron spatial distribu-tion, distribution of electric field in the normal direction of the dielectric surface, and electron density spatial distribution are presented. Numerical results could be concluded as follows. For inner surface, the multipacting first occurs in the area with large electric-field of microwave;for the outer surface, multipacting first occurs in the area with small electric-field of microwave. The above phenomena could be explained as follows. Poynting direction of microwave is the same as the outer surface normal direction and opposite to the inner surface normal direction. So the drift in the area with large electric-field of microwave causes electrons easy to move back to inner surface, and so electrons are easy to leave from outer surface. Compared with 1D3V model, in P3D3V model, we have for inner surface multipactor discharge with long oscillator forming time, small secondary electron number, high average electron energy, low incident power of microwave, and low level deposited power;for outer surface, we have multipactor discharge with short oscillator forming time, small secondary electron number, low average electron energy, low incident power of microwave, and low level de-posited power. The deposited power is about 1%-2%of incident microwave power both in 1D3V and P3D3V models;while the ratio between deposited power and incident power of microwave has nothing to do with microwave parameters and inner or outer surface.关键词
高功率微波/介质表面次级电子倍增/粒子模拟/横向电磁场分布Key words
high power microwave/multipactor discharge on dielectric surface/PIC simulation/transverse distri-bution of electromagnetic field引用本文复制引用
董烨,董志伟,杨温渊,周前红,周海京..介质窗横向电磁场分布下的次级电子倍增效应[J].物理学报,2013,(19):482-491,10.基金项目
国家重点基础研究发展计划(973计划)(批准号:2013CB328904)、国家自然科学基金(批准号:11305015,11105018)、中国工程物理研究院科学技术发展基金(批准号:2012B0402064,2009B0402046)和国家高技术发展计划项目(863计划)资助的课题 （973计划）
