带状注矩形截面Cerenkov脉塞中注波互作用的研究  

Interaction of Sheet Electron-Beam and Wave in Rectangular Crenkov Maser

作　　者：陈晔[1,2] 赵鼎[1] 王勇[1] 舒雯[1,2] 张雪[1,2] 

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]中国科学院研究生院,北京100049

出　　处：《真空科学与技术学报》2012年第5期413-418,共6页Chinese Journal of Vacuum Science and Technology

基　　金：国家自然科学基金资助项目(批准号:60801031)

摘　　要：建立了带状注矩形截面Cerenkov脉塞中注波互作用的三维物理模型。采用保留金属格栅槽区内高次模式的方法,将电磁场表示为本征模级数和的形式,运用Borgnis函数法和场匹配法推导了注波互作用结构的混合模色散方程。通过数值计算,分析了热态下电子注电压、电流密度、电子注厚度以及电子注与金属格栅间隙距离等主要结构和电参数对互作用增益的影响。The electron-wave interaction in the rectangular Crenkov Maser （RCM） with a sheet electron beam was modeled and analyzed. In the proposed three-dimensional model, the higher order modes inside the metal grooves were re- tained as an infinite superposition of the eigen-modes. The hybrid-mode dispersive equation was derived in the field-match and Borgnis function methods. In the numerical calculation, based on the newly-developed model, the impacts of various factors of basic interest, including the beam thickness,gaps between electron beam and metal grating, beam voltage, cur- rent density, on the interaction gains were calculated. The results show that the maximum linear gain of 1.274 dB/cm^2 can be obtained at a beam voltage of 7.082 kV,a current density of 10 A/cm^2,and a frequency of 16.14 GHz.

关 键 词：Cerenkov脉塞本征模Borgnis函数法色散方程互作用增益 

分 类 号：TN124[电子电信—物理电子学]