Accession Number : AD0787455

Title :   Numerical Solutions of the Three-Dimensional Kinetic Equation of the Parametric Decay Instability.

Descriptive Note : Final rept. Jan 73-74,

Corporate Author : AIR FORCE WEAPONS LAB KIRTLAND AFB N MEX

Personal Author(s) : Letterio,J. D. ; Godfrey,B. B.

Report Date : JUL 1974

Pagination or Media Count : 136

Abstract : The three-dimensional time dependent kinetic equation for the saturation of the weakly driven parametric decay instability is solved numerically. Two cases are considered: (1) nonlinear Landau damping only and (2) nonlinear Landau damping plus mode-coupling. For both, relative pump powers range from 1 to 20. In general, the mode-coupling terms act to enhance saturation energy somewhat at large angles, without significantly affecting the total saturation energy level or the time evolution prior to saturation. For a deuterium plasma, the anomalous resistivity rate (relative to the plasma collision frequency) is found to be approximately 3.2 P sup(1.35), with P the relative pump power. (Author)

Descriptors :   *Plasmas(Physics), *Laser beams, Langmuir probes, Optical pumping, Instability, Spectrum analysis, Computer programs, FORTRAN, Deuterium

Subject Categories : Plasma Physics and Magnetohydrodynamics

Distribution Statement : APPROVED FOR PUBLIC RELEASE