Parametric phonon turbulence in the field of two circularly polarized UHF waves
Abstract
The interaction of two strong circulary polarized UHF pump waves with a fully ionized homogeneous plasma is considered. If the difference of their frequencies is near or smaller than twice the ion plasma frequency, phonons can be parametrically excited. The threshold value for this decay process depends on the frequency difference and the dissipative effects in the plasma. After exceeding the thermal level the phonons are stabilized due to the scattering by the ions. The evolution of the parametrically excited phonon turbulence and the transition into a stationary state are described by a nonlinear integrodifferential equation for the spectral energy density of the phonons. This equation is solved analytically as well as numerically, and it is shown that the phonon turbulence is strongly influenced by the propagation directions of the pump waves and the electronion temperature ratio.
 Publication:

Beitraege Plasmaphysik
 Pub Date:
 1977
 Bibcode:
 1977BePl...17..273A
 Keywords:

 Circular Polarization;
 Magnetohydrodynamic Stability;
 Phonons;
 Plasma Turbulence;
 Ultrahigh Frequencies;
 Integral Equations;
 Ion Motion;
 Ion Scattering;
 Landau Damping;
 Plasma Heating;
 Plasma Physics