强激光与粒子束2018，Vol.30Issue(7)：53-57,5.DOI:10.11884/HPLPB201830.170530
微波器件微放电阈值功率自适应扫描方法
Adaptive scanning method for multipactor threshold prediction in microwave devices
摘要
Abstract
Without the power scanning function,the traditional Particle-in-Cell simulation software needs to perform many times in order to achieve multipactor threshold prediction.Therefore,an adaptive scanning method is proposed without consider-ing the self-consistent field generated by electrons.Under the effect of the electromagnetic field distribution calculated by MSAT, the electron motion is tracked and updated with leapfrog algorithm.Secondary electrons are released once electrons reach the boundaries of the simulation region.The criterion for determining multipactor occurrence is established according to the particle number curve via the multipactor simulation.Meanwhile,the power input is adaptively adj usted by the bisection method so that the multipactor threshold can be automatically determined with a given initial power.For verification,multipactor thresholds of stepped impedance transformer and coaxial cavity filters obtained with adaptive-scanning method are compared with experiments. And the simulation results accord well with the experimental data.关键词
微放电阈值/粒子模拟/二分法/阈值判据Key words
multipactor threshold/Particle-in-Cell/bisection method/threshold criterion分类
数理科学引用本文复制引用
翟永贵,李记肖,王洪广,林舒,李永东..微波器件微放电阈值功率自适应扫描方法[J].强激光与粒子束,2018,30(7):53-57,5.基金项目
国家自然科学基金项目(U1537210) （U1537210）
