Linear analysis of a three-dimensional rectangular Cerenkov maser with a sheet electron beam  

作　　者：陈晔 赵鼎 王勇 

机构地区：[1]Key Laboratory of High Power Microwave Sources and Technologies, Institute of Electronics, Chinese Academy of Sciences [2]Graduate University of the Chinese Academy of Sciences

出　　处：《Chinese Physics B》2011年第10期469-475,共7页中国物理B（英文版）

基　　金：supported by the National Natural Science Foundation of China (Grant No. 60801031)

摘　　要：A linear theory of a rectangular Cerenkov maser （RCM） with a sheet electron beam is developed by using the field- match method. Based on the three-dimensional beam-wave interaction model proposed in this paper, a hybrid-mode dispersion equation and its analytical solution are derived for the RCM. Through numerical calculations, the effects of the beam-grating gap, beam thickness, current density, beam voltage and waveguide width on the linear growth rate axe analysed. Moreover, the performance difference between the RCM with the closed transverse boundary and that with the upper open boundary is compared. The results show that the closed RCM model can avoid the effect of RF radiation on beam-wave interaction, which is more rational for practical applications.A linear theory of a rectangular Cerenkov maser （RCM） with a sheet electron beam is developed by using the field- match method. Based on the three-dimensional beam-wave interaction model proposed in this paper, a hybrid-mode dispersion equation and its analytical solution are derived for the RCM. Through numerical calculations, the effects of the beam-grating gap, beam thickness, current density, beam voltage and waveguide width on the linear growth rate axe analysed. Moreover, the performance difference between the RCM with the closed transverse boundary and that with the upper open boundary is compared. The results show that the closed RCM model can avoid the effect of RF radiation on beam-wave interaction, which is more rational for practical applications.

关 键 词：Cerenkov maser field-match method beam-wave interaction hybrid-mode dispersion growth rate 

分 类 号：O53[理学—等离子体物理]