Parametric turbulence induced in a magnetically active plasma by an instability involving the decay of an intense electromagnetic wave into two potential oscillations with the frequency of the lower hybrid resonance
Abstract
The paper studies the evolution of unsteadystate plasma turbulence which arises as a result of the parametric decay of a strong pump wave into two longitudinal oscillations with the frequency of the lower hybrid resonance in a magnetically active plasma containing magnetized electrons. In the case of small frequency differences, a nonlinear integrodifferential equation is obtained for the spectral energy density of the lower hybrid resonance and is solved in the two mutually complementary limiting cases of differential and integral spectral energy transfer. Values are thus obtained for the electricalenergy density of potential fields in the steadystate turbulent plasma state, the coefficient of nonlinear transformation of strong pumpwave radiation into oscillations with the frequency of the lower hybrid resonance, and the characteristic time for turbulence evolution. Formulas characterizing the turbulence as a function of pumpwave and plasma parameters as well as of the constant external magnetic field are illustrated by numerical estimates applicable to the polar ionospheric plasma.
 Publication:

Zhurnal Tekhnicheskoi Fiziki
 Pub Date:
 June 1976
 Bibcode:
 1976ZhTFi..46.1192G
 Keywords:

 Ionospheric Heating;
 Plasma Oscillations;
 Plasma Resonance;
 Plasma Turbulence;
 PlasmaElectromagnetic Interaction;
 Polar Regions;
 Asymptotic Methods;
 Bessel Functions;
 Energy Transfer;
 Fourier Transformation;
 Magnetic Effects;
 Plasma Heating;
 Plasmons;
 Steady State;
 Thermal Noise;
 Plasma Physics