摘要
轴向电子注通过介质慢波系统，当波的相速略低于电子注的速度时就可产生相干的切伦可夫辐射，这一现象是一切行波管的基础。本文利用线性理论，通过自洽求解粒子连续性方程和相对论运动方程与麦克斯韦方程组，分析了薄环形相对论电子注介质切伦可夫脉塞的注波互作用，得到了完全描述其薄环形电子注作用的跳变条件，导出了描述其不稳定性的色散方程和注波互作用的同步条件，并求得了波增长率。
An axial electron beam passing through a dielectric slow-wave structure can producecoherent Cherenkov radiation whose phase velocity is slightly slower than the velocity of the beam.This phenomenon is the basis of all traveling wave tubes.In this paper the equation of continuity ,the equation of relativistic motion and Maxwell’ s equations are self-consistently solved by Iinear theory. The beam-waveinteraction of the dielectric Cherenkov maser with a thin annular relativistic electron beam is analysed. Thejump condition which completely describs the effect of the thin annular electron beam is obtained. And thedispersion equation and the simultaneous condition of the bead-wave interaction are derived .Finally ,thegrowth rate of the wave produced by the electron beam is obtained.
出处
《电子科技大学学报》
EI
CAS
CSCD
北大核心
1995年第5期505-509,共5页
Journal of University of Electronic Science and Technology of China
基金
国家自然科学基金和国家科委863高科技资助项目
关键词
线性理论
介质
切伦可夫脉塞
色散方程
微波器件
Iinear theory
dielectric Cherenkov maser
jump condition
dispersion equation
wave growth rate
