摘要
建立了双间隙耦合腔中高次模式小信号电子电导计算模型,使用该模型和ISFIEL3D电磁场软件模拟的高次模式电场分布图分析了双间隙耦合腔中高次模式的自激性质。由3维粒子模拟软件对双间隙耦合腔自激模拟显示实际结构中存在高次模式3.17 GHz和3.99 GHz自激,验证了使用该方法分析双间隙耦合腔中高次模式自激性质的合理性。并通过对热测数据的分析说明实际结构中确实存在相应的模式自激并伴随吸收腔和耦合环发热现象。
The analytic expression of high order mode electronic conductance model in double gap coupling multi-beam klystron（MBK） cavity is presented. The oscillations of high order modes were studied by the model and field structures have been simulated with electromagnetic field software ISFEL3D. It is shown that there are self-excitation modes 2.9 GHz and 3.89 GHz in the double gap coupling MBK cavity, which is verified by the three-dimensional PIC simulation. In addition, the corresponding self-excitation modes＇ frequencies are also given with the temperature increase of the absorbing cavity and coupling ring by the analysis of experimental results.
出处
《强激光与粒子束》
EI
CAS
CSCD
北大核心
2008年第10期1699-1703,共5页
High Power Laser and Particle Beams
基金
国家自然科学基金项目(60701011)
关键词
多注速调管
双间隙耦合腔
自激振荡
高次模式
电子电导
Multi-beam klystron
Double gap coupling cavity
Self-excitation
High order mode
Electronic conductance
