Induced emission of radiation near 2&ohgr;eby a synchrotron‐maser instability
作者:
C. S. Wu,
G. C. Zhou,
J. D. Gaffey,
期刊:
Physics of Fluids(00319171)
(AIP Available online 1985)
卷期:
Volume 28,
issue 3
页码: 846-853
ISSN:0031-9171
年代: 1985
DOI:10.1063/1.865053
出版商: AIP
数据来源: AIP
摘要:
In the literature, the emission of radiation at 2&ohgr;e, where &ohgr;edenotes the electron plasma frequency, is usually explained as having been produced by the nonlinear interaction of two Langmuir waves via a backscattering process. Since the emission is frequently observed in solar radio bursts, the mechanism has attracted considerable theoretical interest. In the present paper a model is proposed based on a synchrotron‐maser instability excited by a hollow beam of moderately relativistic electrons in a plasma, in which the plasma frequency is much higher than the gyrofrequency. An important conclusion is that, as a result of this instability, unpolarized electromagnetic waves with frequencies near 2&ohgr;emay be amplified.
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