多间隙休斯结构耦合腔轴向电场分布的解析计算  

Analytic Calculation of Axial Electric Field Distribution in Multi-Gap Hughes-Type Coupled Cavity

作　　者：张海鱼 罗积润[1] 朱敏[1] 郭炜[1] 

机构地区：[1]中国科学院电子学研究所中国科学院高功率微波源与技术重点实验室,北京100190 [2]中国科学院大学,北京100049

出　　处：《真空科学与技术学报》2014年第10期1047-1054,共8页Chinese Journal of Vacuum Science and Technology

基　　金：国家自然科学基金资助项目(11205162)

摘　　要：在考虑相邻谐振腔间耦合作用对电场分布影响的基础上,分析了多间隙休斯结构耦合腔中存在模式电场分布的特点,采用双曲正割函数拟合代替传统无耦合单间隙腔中电场分布计算的高斯函数拟合,构建了多间隙耦合腔轴向电场分布函数计算的解析表达式。经不同几何参数和间隙数目耦合腔的仿真验证,电场分布解析计算结果与CST-MWS仿真结果具有好的一致性,对分布作用速调管注波互作用模拟和工程研制有益。The axial electric field distribution for different modes in multi-gap Hughes-type coupled cavity was modeled based on field coupling of adjacent cavities, analytically calculated and fitted in terms of hyperbolic secant function instead of Gaussian function, conventionally used to evaluate the axial field distribution in a single-gap cavity. An analytic expression of the axial field distribution was derived by superposing the fields in adjacent cavities. The axial field distribu- tions in the multi-gap Hughes-type coupled cavity with different geometries and cavity-gap numbers were also simulated with CST-MWS code. The analytically calculated results were found to agree fairly well with the numerically simulated da- ta. We suggest that the newly-developed calculation scheme may be of much technological interest in simulation of the beam-wave interaction of extended interaction ldystron.

关 键 词：多间隙休斯结构耦合腔 轴向电场分布 解析计算 仿真结果 

分 类 号：TN122[电子电信—物理电子学]