Electrodynamic properties of dense high-temperature plasma

An expression for the longitudinal dielectric function of dense high-temperature isotropic plasma is obtained on the basis of the semiclassical approach and the linear density-response formalism. Spectrum and decrement of plasma waves, including quantum-mechanical effects, are derived. The linear and nonlinear stages of parametric two-plasmon instability, developing under the influence of electromagnetic radiation beam are studied. One of the possible saturation mechanism caused by nonlinear frequency shift is evaluated