Radiation from the Two-Stream Instability
Radiation from the Two-Stream Instability
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DOI：
10.1103/physreva.1.872
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发表时间：
1970
影响因子：
2.9
通讯作者：
D. Ignat;J. Hirshfield
中科院分区：
文献类型：
--
作者：
D. Ignat;J. Hirshfield
研究了无界均匀冷等离子体的纵波和横波之间的耦合，其中几个等离子体组分彼此相对漂移。对于沿均匀直流磁场B方向的相互相对论流动，导出了色散关系。对于两束相等的对流电子束的特殊情况，将非常波色散律与Lee的非相对论结果进行了比较。对B=0时的色散关系进行了较为详细的分析，特别是对不稳定本征模的偏振进行了分析，并与Neufeld的结果进行了比较。我们在解析和数值上都表明，除了高度相对论的流动速度和与背景等离子体相当的束流等离子体频率外，辐射效应相对较小。
Coupling between longitudinal and transverse waves is examined for an unbounded homogeneous cold plasma in which the several plasma constituents are in relative drift with respect to one another. For mutual relativistic streaming along the direction of a homogeneous dc magnetic field B, a dispersion relation is derived. For the special case of two equal counterstreaming electron beams, the extraordinary wave-dispersion law is compared with Lee's nonrelativistic result. For B= 0, the dispersion relation is analyzed in some detail, especially as regards the polarization of the unstable eigenmode, and compared with results of Neufeld. We show, both analytically and numerically, that radiation effects are relatively insignificant, except for highly relativistic streaming velocity and for a beam-plasma frequency comparable to that of the background plasma.