Accession Number:

AD0772533

Title:

Parametric Instabilities Induced by the Coupling of High and Low Frequency Plasma Modes,

Descriptive Note:

Corporate Author:

NAVAL RESEARCH LAB WASHINGTON D C

Personal Author(s):

Report Date:

1973-12-01

Pagination or Media Count:

40.0

Abstract:

A general dispersion relation is derived for parametric instabilities caused by a large amplitude pump wave which couples high and low frequency modes of a magnetized plasma. The nonlinear effects coupling the high and low frequency waves are 1 the low-frequency pondermotive force due to the coupling of the pump with the high frequency perturbations, and 2 the high frequency nonlinear source current density produced by coupling of the pump with the low frequency perturbations. The dispersion relation contains decay instabilities, purely growing instabilities, modulational instabilities, self-focusing and nonlinear Landau damping. As examples the authors apply the dispersion relation to self-focusing, magnetosonic decay and purely growing instabilities, whistler decay and nonlinear Landau damping of electron plasma waves and transverse electromagnetic waves. Author

Subject Categories:

  • Plasma Physics and Magnetohydrodynamics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE