Numerical Solutions of the Three-Dimensional Kinetic Equation of the Parametric Decay Instability.
Final rept. Jan 73-74,
AIR FORCE WEAPONS LAB KIRTLAND AFB N MEX
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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 sup1.35, with P the relative pump power. Author
- Plasma Physics and Magnetohydrodynamics