Parametric instabilities in plasma with sinusoidal density modulation

Parametric instabilities in the presence of sinusoidal plasma density modulation are considered analytically and by numerical integration of the coupled mode equations. The density modulation tends to reduce temporal and spatial growth rates. If there is a linear density gradient in addition to the...

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Bibliographic Details
Published in:The Physics of fluids (1958) 1976-06, Vol.19 (6), p.889-895
Main Author: Nicholson, Dwight R.
Format: Article
Language:English
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Summary:Parametric instabilities in the presence of sinusoidal plasma density modulation are considered analytically and by numerical integration of the coupled mode equations. The density modulation tends to reduce temporal and spatial growth rates. If there is a linear density gradient in addition to the density modulation, the usual convective saturation exists for small modulation; however, above a certain threshold modulation, the convective saturation is replaced by absolute growth. This result is in qualitative agreement with earlier work on plasma with linear density gradient plus turbulence.
ISSN:0031-9171
2163-4998
DOI:10.1063/1.861555