中国物理B ›› 2014, Vol. 23 ›› Issue (4): 48402-048402.doi: 10.1088/1674-1056/23/4/048402
• INTERDISCIPLINARY PHYSICS AND RELATED AREAS OF SCIENCE AND TECHNOLOGY • 上一篇 下一篇
李韵a, 崔万照a, 张娜a, 王新波a, 王洪广b, 李永东b, 张剑锋c
Li Yun (李韵)a, Cui Wan-Zhao (崔万照)a, Zhang Na (张娜)a, Wang Xin-Bo (王新波)a, Wang Hong-Guang (王洪广)b, Li Yong-Dong (李永东)b, Zhang Jian-Feng (张剑锋)c
摘要: Based on the particle-in-cell technology and the secondary electron emission theory, a three-dimensional simulation method for multipactor is presented in this paper. By combining the finite difference time domain method and the particle tracing method, such an algorithm is self-consistent and accurate since the interaction between electromagnetic fields and particles is properly modeled. In the time domain aspect, the generation of multipactor can be easily visualized, which makes it possible to gain a deeper insight into the physical mechanism of this effect. In addition to the classic secondary electron emission model, the measured practical secondary electron yield is used, which increases the accuracy of the algorithm. In order to validate the method, the impedance transformer and ridge waveguide filter are studied. By analyzing the evolution of the secondaries obtained by our method, multipactor thresholds of these components are estimated, which show good agreement with the experimental results. Furthermore, the most sensitive positions where multipactor occurs are determined from the phase focusing phenomenon, which is very meaningful for multipactor analysis and design.
中图分类号: (Passive circuit components)