Open AccessANALYSES OF BEAM-WAVE INTERACTION IN A DIELECTRIC LINED SLOW-WAVE WAVEGUIDE WITH A PLASMA COLUMN
Author(s) -
Wu Jian-Qiang,
Shenggang Liu
Publication year - 1997
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.46.1946
Subject(s) - dispersion relation , physics , relativistic electron beam , plasma , electromagnetic electron wave , beam (structure) , cathode ray , dispersion (optics) , waveguide , electron , optics , atomic physics , wave propagation , dielectric , computational physics , quantum mechanics
A new type of slow-wave system (SWS) for the beam-wave interaction——putting a plasma column into a dielectric-partially-filled waveguide, is presented. By use of the linear self-consistent field theory, the interaction of a relativistic electron beam with the wave in the SWS is analysed. Determinative dispersion equations are derived for a thin annular relativistic electron beam propagating through the SWS surrounding and existing inside the plasma column, respectively. These dispersion equations are directly solved numerically, and the cut-off frequency, the operation frequency and the growth rate of the waves are obtained. Finally, the effects of the parameters of the plasma column on them are discussed.