W波段高功率回旋管输出窗的热分析  

Thermal Analysis of Output Windows for W-Band High Power Gyrotrons

作　　者：徐望炬 熊能 郭思豆 徐倩[1] 陈科[1] 张开春[1] XU Wang-ju;XIONG Neng;GUO Si-dou;XU Qian;CHEN Ke;ZHANG Kai-chun(THz Center,School of Electronic Science and Engineering,University of Electronic Science and Technology of China,Chengdu 610054,China)

机构地区：[1]电子科技大学电子科学与工程学院太赫兹中心,四川成都610054

出　　处：《真空电子技术》2020年第6期41-44,67,共5页Vacuum Electronics

基　　金：国家重点研发计划资助项目(编号:2017YFA0701000);太赫兹教育部开放基金项目。

摘　　要：输出窗是回旋管的重要部件之一,直接决定回旋管的工作效率与使用寿命。选用高阶模作为高功率回旋管的工作模式,并采用蓝宝石作为回旋管输出窗的窗片。应用电磁波传输理论计算蓝宝石在高阶模下的结构参数,并在HFSS中对回旋管输出窗进行建模,对高阶模的角向对称处理方法的准确性进行验证。采用HFSS与ANSYS Workbench联合仿真对输出窗进行稳态热分析,并利用Comsol软件对输出窗进行瞬态热分析。对于工作频率94 GHz和传输功率100 kW的高功率回旋管,在稳态热分析时,窗片会炸裂;而在瞬态热分析时,窗片能持续工作接近20 s。The output window is an important component of the gyrotron,which determines the working efficiency and lifetime of the gyrotron.High-order mode is chosen as operation mode and sapphire is used as output window material of high power gyrotron in research.Parameters of the sapphire window are calculated based on electromagnetic wave transmission theory,and the accuracy of the angular symmetry processing method for high-order mode is verified by using HFSS software.Joint simulation of HFSS and ANSYS Workbench is employed to perform steady-state thermal analysis,and COMSOL software is used to perform transient thermal analysis on the output window,respectively.For a high power gyrotron with the operating frequency of 94 GHz and the transmission power of 100 kW,the sapphire window bursts in steady-state thermal analysis while works for nearly 20 s in transient thermal analysis.

关 键 词：输出窗 高阶模 电磁仿真 稳态热分析 瞬态热分析 

分 类 号：TN12[电子电信—物理电子学]