Theoretical analysis of a relativistic travelling wave tube filled with plasma  

作　　者：谢鸿全 刘濮鲲 

机构地区：[1]School of Science, Southwest University of Science and Technology, Mianyang 621010, China [2]Institute of Electronics, Chinese Academy of Sciences, Beijing 100080, China

出　　处：《Chinese Physics B》2007年第3期766-771,共6页中国物理B（英文版）

基　　金：Project supported by the National Natural Science Foundation of China （Grant No 10347009） and Science Foundation of Education Bureau of Sichuan Province, China （Grand No 2003B019）.

摘　　要：A cold and uniform plasma-filled travelling wave tube with sinusoidally corrugated slow wave structure is driven by a finite thick annular intense relativistic electron beam with the entire system immersed in a strong longitudinal magnetic field. By means of the linear field theory, the dispersion relation for the relativistic travelling wave tube （RTWT） is derived. By numerical computation, the dispersion characteristics of the RTWT are analysed in different cases of various geometric parameters of the slow wave structure and plasma densities. Also the gain versus frequency for three different plasma densities and the peak gain of the tube versus plasma density are analysed. Some useful results are obtained on the basis of the discussion.A cold and uniform plasma-filled travelling wave tube with sinusoidally corrugated slow wave structure is driven by a finite thick annular intense relativistic electron beam with the entire system immersed in a strong longitudinal magnetic field. By means of the linear field theory, the dispersion relation for the relativistic travelling wave tube （RTWT） is derived. By numerical computation, the dispersion characteristics of the RTWT are analysed in different cases of various geometric parameters of the slow wave structure and plasma densities. Also the gain versus frequency for three different plasma densities and the peak gain of the tube versus plasma density are analysed. Some useful results are obtained on the basis of the discussion.

关 键 词：RTWT PLASMA annular electron beam dispersion characteristic GAIN 

分 类 号：TN124[电子电信—物理电子学]