Nonlinear Wave Optics of Parametric Pump Radiation in a Inhomogeneous Plasma.
COLORADO UNIV BOULDER DEPT OF ASTRO-GEOPHYSICS
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The self-consistent propagation of an intense pump beam that excites a parametric decay instability is calculated for an inhomogeneous plasma. The authors generalize to an inhomogeneous plasma the nonlinear absorptive conductivity calculated according to several recent theories for the saturated electron ion-decay instability in an homogeneous plasma. Saturation of the nonlinear conductivity for strong pumping is taken into account. This model of the nonlinear absorption is added to the linear absorption, and the authors carry out the numerical solution of the resulting nonlinear wave equation for radiation propagating into a plane-layered inhomogeneous plasma. Application is made to the anomalous absorption of the modifier radiation in ionospheric modification experiments and to absorption of laser radiation in laser-produced plasmas. Modified author abstract
- Plasma Physics and Magnetohydrodynamics