Open AccessSlow-wave electromagnetic instability driven by wiggling relativistic electron beam in ion-channel
Author(s) -
Zhenyu Wang,
Chao Tang
Publication year - 2011
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.60.055204
Subject(s) - betatron , physics , instability , electron , electromagnetic radiation , beam (structure) , two stream instability , plasma , atomic physics , computational physics , quantum electrodynamics , mechanics , quantum mechanics , optics
The slow-wave electromagnetic (EM) instability excited by a relativistic electron beam (REB) injecting plasmas has been studied using linear electromagnetic hydrodynamic (EMHD) theory. The features of multiple waves propagation are presented. The results of numerical calculation prove that the EM instability occurs in slow-wave band. The necessary and sufficient condition of the EM instability has been found. Both analytic discussion and physical analysis reveal that the electron betatron motion is one of important factors for the EM instability. The physical mechanism of the instability driven by the electron betatron motion has been discussed.