物理学报Issue(22)：1-7,7.DOI:10.7498/aps.63.220205
多载波微放电中二次电子横向扩散的概率分析
Probabilistic analysis of the lateral diffusion of secondary electrons in multicarrier multipactor
摘要
Abstract
Recently, a new mechanism of secondary electron multipaction, termed “long-term” multicarrier multipactor, was found in wideband high-power systems used in vacuum environments. Due to the long-term accumulation of secondary electrons between consecutive periods of the multicarrier signal, the long-term multicarrier multipactor has relatively low discharge threshold and is difficult to predict, thus causes potential reliability problems in space and accelerator applications. In this paper, we propose a stochastic approach to the analytical analysis of the multicarrier multipactor discharge occurring in inhomogeneous electric fields. By introducing the random walk and Levy walk theory, the probabilistic model of the lateral diffusion of secondary electrons in the process of a multipactor discharge is derived. Based on the derived probability density, the purely theoretical calculation of the accumulation of secondary electrons of a multicarrier multipactor in a rectangular waveguide supporting TE10 mode is given. The theoretical results comply well with the results achieved by the time-consuming particle simulation, with reducing computational time by about one- order of magnitude. The presented probability density of the lateral diffusion of secondary electrons can have applications in high-power electronics and electromagnetism.关键词
多载波微放电/二次电子/随机漫步/概率密度Key words
multicarrier multipactor/secondary electrons/random walk/probability density引用本文复制引用
宋庆庆,王新波,崔万照,王志宇,冉立新..多载波微放电中二次电子横向扩散的概率分析[J].物理学报,2014,(22):1-7,7.基金项目
国家自然科学基金重点项目(批准号:61131002)和国家重点实验室基金项目(批准号:9140A21060211HT0511)资助的课题.* Project supported by the Key project of Natural Science Foundation of China (Grant No.61131002) and National Key Laboratory Foundation of China (Grant No.9140A21060211HT0511) （批准号:61131002）
