On plasma nonstationary turbulence while parametric resonance

Analysis of the nonlinear integrodifferential equation for the spectral energy density of longwave ion-acoustic waves subjected to stimulated scattering by ions reveals an oscillatory structure in the nonstationary turbulent state of a nonisothermal plasma; the turbulence is initiated by a parametric instability involving the decay of an intense electromagnetic wave into an electron plasma wave and an acoustic wave. The stability of the stationary turbulent of a parametrically excited plasma, studied previously, is demonstrated. The period of the oscillations in the anomalous-absorption coefficient for absorption of intense radiation by a plasma near the critical density is found. A numerical estimate of this period is given for the case of a laser-produced plasma