期刊
NEW JOURNAL OF PHYSICS
卷 23, 期 12, 页码 -出版社
IOP Publishing Ltd
DOI: 10.1088/1367-2630/ac4125
关键词
electron beam-plasma system; system instability; kinetic approach; electron velocity
资金
- Russian Science Foundation (RSF) [21-19-00139]
- Russian Science Foundation [21-19-00139] Funding Source: Russian Science Foundation
This study investigates the stability of a system consisting of a fast electron beam and a dense plasma with an anisotropic electron velocity distribution function. It was found that plasma anisotropy has a significant effect on both stability loss conditions and growth rate, with physical interpretations proposed for observed effects.
Based on the kinetic approach, this work investigates the stability of the system consisting of a fast electron beam and a dense plasma at an arbitrary (anisotropic) electron velocity distribution function. It is shown that during the interaction of a fast electron beam with a cold plasma, both the conditions for losing stability and the growth rate of disturbances do not depend on the form of the electron distribution function (EDF) of a plasma and are determined only by the ratio of the electron beam energy to the mean energy in a plasma. With an increase in the mean electron energy in the plasma, it becomes necessary to take into account the following energy moments of the EDF. It was found that the plasma anisotropy has a significant effect on both the stability loss conditions and the growth rate. The physical reason for this effect is the shift in the plasma frequency due to the Doppler effect caused by the plasma anisotropy in the coordinate system moving along with the beam. Other findings include a region of anomalous dispersion of the electron beam-plasma system and regions of negative group velocity of perturbations in such system. Physical interpretations are proposed for all the observed effects.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据