ELECTROMAGNETIC-INSTABILITY AND EMISSION FROM COUNTERPROPAGATING LANGMUIR-WAVES

被引：17

作者：

GLANZ, J ^{[1
]}

GOLDMAN, MV ^{[1
]}

NEWMAN, DL ^{[1
]}

MCKINSTRIE, CJ ^{[1
]}

机构：

[1] LAB LASER ENERGET,ROCHESTER,NY 14623

来源：

PHYSICS OF FLUIDS B-PLASMA PHYSICS | 1993年 / 5卷 / 04期

关键词：

D O I：

10.1063/1.860954

中图分类号：

O35 [流体力学]; O53 [等离子体物理学];

学科分类号：

070204 ; 080103 ; 080704 ;

摘要：

This paper analyzes fundamental electromagnetic (em) emission, near the plasma frequency, from a pair of counterpropagating Langmuir pump waves in an externally driven plasma. The emission is a result of parametric instabilities of both Stokes (frequency-downshifted) and anti-Stokes (frequency-upshifted) em waves. A new, sixth-order dispersion relation is derived for the linearly unstable em waves. Previous treatments of this problem neglected the existence of two independent density ''gratings'' produced by the beating together of high-frequency waves. These gratings, which can be resonant ion-acoustic waves, are of comparable importance, and must be considered together in order to give the correct growth rates. The present results may have relevance to fundamental emission from laser-driven targets and to other systems, such as the radio-wave-modified ionosphere.

引用

页码：1101 / 1114

页数：14

共 31 条

[1] 3-DIMENSIONAL LANGMUIR WAVE INSTABILITIES IN TYPE-III SOLAR RADIO-BURSTS [J].