Parametric instabilities in plasma with sinusoidal density modulation
Abstract
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.
 Publication:

Physics of Fluids
 Pub Date:
 June 1976
 DOI:
 10.1063/1.861555
 Bibcode:
 1976PhFl...19..889N
 Keywords:

 Density Distribution;
 Magnetohydrodynamic Stability;
 Nonuniform Plasmas;
 Plasma Density;
 Backscattering;
 Group Velocity;
 Numerical Integration;
 Raman Spectra;
 Sine Waves;
 Plasma Physics