Nonlinear instability of electromagnetic drift waves
作者:
Kunioki Mima,
Akira Hasegawa,
期刊:
Physics of Fluids(00319171)
(AIP Available online 1978)
卷期:
Volume 21,
issue 1
页码: 81-86
ISSN:0031-9171
年代: 1978
DOI:10.1063/1.862082
出版商: AIP
数据来源: AIP
摘要:
A pair of electromagnetic drift waves is shown to be excited simultaneously by an induced Cere´nkov emission by electrons. The instability is shown to be explosive. However, its property is different from the ordinary explosive instability involving three wave interactions with a negative energy wave pump. The instability here is excited by the inverted population of electrons (inverse Landau damping) and is less sensitive to the frequency mismatch or dissipation. The nonlinear growth rate is shown to exceed the linear growth rate at a reasonably small level of wave amplitude. A magnetic field perturbation is essential for this process.
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