Wave growth rate in a cylindrical metal waveguide with ion-channel guiding of a relativistic electron beam

被引：0
|
作者：
李海容 [1 ,2 ]
唐昌建 [1 ]
王顺金 [1 ]
机构：
[1] School of Physics Science and Technology,Sichuan University
[2] College of Science,University of Science and Technology Liaoning
来源：
Chinese Physics B | 2010年 / 19卷 / 12期
基金：
中国国家自然科学基金;
关键词：
relativistic electron beam; plasma; ion channel; dispersion relations; wave growth rate;
D O I：
暂无
中图分类号：
TN252 [光波导];
学科分类号：
0702 ; 070207 ;
摘要：
This paper addresses the formulae and numerical issues related to the possibility that fast wave may be grown when a relativistic electron beam through an ion channel in a cylindrical metal waveguide.To derive the dispersion equations of the beam-wave interaction,it solves relativistic Lorentz equation and Maxwell’s equations for appropriate boundary conditions.It has been found in this waveguide structure that the TM 0m modes are the rational operating modes of coupling between the electromagnetic modes and the betatron modes.The interaction of the dispersion curves of the electromagnetic TM 0m modes and the upper betatron modes is studied.The growth rates of the wave are obtained,and the effects of the beam radius,the beam energy,the plasma frequency,and the beam plasma frequency on the wave growth rate are numerically calculated and discussed.
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页码：238 / 245
页数：8
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