Effect of Plasma on Spectra of the Cherenkov Beam Instability in a Dielectric Waveguide

IF 0.6 4区 物理与天体物理 Q4 PHYSICS, MULTIDISCIPLINARY
A. V. Ershov, M. V. Kuzelev
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引用次数: 0

Abstract

We report a study of the spectrum of the Cherenkov beam instability in a plasma dielectric waveguide. In the absence of plasma, the instability results from the induced Cherenkov radiation of many transverse slow electromagnetic modes of the waveguide. In the presence of plasma, the long-wavelength part of the spectrum is due to the excitation of a potential Langmuir wave, aperiodic self-modulation of the beam, and Cherenkov radiation of a surface plasma wave; the high-frequency part of the spectrum weakly depends on the presence of plasma in the waveguide.

等离子体对介质波导切伦科夫光束不稳定性谱的影响
本文报道了等离子介质波导切伦科夫波束不稳定性谱的研究。在没有等离子体的情况下,这种不稳定性是由于波导的许多横向慢电磁模式的切伦科夫辐射引起的。在等离子体存在的情况下,光谱的长波长部分是由于潜在朗缪尔波的激发、光束的非周期自调制和表面等离子体波的切伦科夫辐射;频谱的高频部分弱依赖于波导中等离子体的存在。
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来源期刊
Bulletin of the Lebedev Physics Institute
Bulletin of the Lebedev Physics Institute PHYSICS, MULTIDISCIPLINARY-
CiteScore
0.70
自引率
25.00%
发文量
41
审稿时长
6-12 weeks
期刊介绍: Bulletin of the Lebedev Physics Institute is an international peer reviewed journal that publishes results of new original experimental and theoretical studies on all topics of physics: theoretical physics; atomic and molecular physics; nuclear physics; optics; lasers; condensed matter; physics of solids; biophysics, and others.
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