
Accession Number : AD0657774
Title : NONLINEAR MIXING OF WAVES IN A PLASMA WITH VELOCITYDEPENDENT COLLISIONS.
Descriptive Note : Interim technical rept.,
Corporate Author : RCA VICTOR CO LTD MONTREAL (QUEBEC) RESEARCH LABS
Personal Author(s) : Shkarofsky,Issie P.
Report Date : MAY 1967
Pagination or Media Count : 45
Abstract : The frequency difference, sum and second harmonic currents, due to two interacting waves in a plasma with no external magnetic field, are calculated. The oscillation frequencies are taken to be sufficiently high that ion motion can be neglected. Landau damping is negligible compared to collisional damping. The nonlinearity is due to gradients in the ac electric fields. The form of the zero order isotropic and nonoscillatory part of the velocity distribution function is left arbitrary. The velocity dependences of the collision frequency of electrons with neutrals, ions and other electrons are properly accounted for. The FokkerPlanck equation in its integrodifferential form and including nonlinear terms is used for electronelectron collisions. The selfconsistent electric field is included with nonlinear terms. Results are given (a) for any degree of ionization provided the lowest frequency in the mixing process is greater than the total collision frequency and (b) for a slightly ionized gas for any ratio of oscillation to collision frequency. In the former case, it is shown that electronelectron effects do not contribute to the nonlinear current arising from wavemixing but contribute to the nonlinear selfconsistent electric field. (Author)
Descriptors : (*MAGNETOHYDRODYNAMICS, MATHEMATICAL ANALYSIS), NONLINEAR SYSTEMS, INTERACTIONS, VELOCITY, OSCILLATION, PLASMAS(PHYSICS), DAMPING, ELECTRIC FIELDS, ELECTRONS, FREQUENCY, DISTRIBUTION FUNCTIONS, GAS IONIZATION, CANADA
Subject Categories : Plasma Physics and Magnetohydrodynamics
Distribution Statement : APPROVED FOR PUBLIC RELEASE