Nonlinear electronic waves in warm plasmas

Abstract

The properties of nonlinear longitudinal electronic waves propagating through warm plasma are examined. Thus, using the kinetic theory and the reductive perturbation method in the third order of approximation, it is shown that the nonlinear wave–wave interactions lead to phase velocity shifts. When the thermal velocity, νT, is much smaller than the phase velocity, νf (νT≪νf), an energy transfer appears from the wave to the plasma electrons, together with a decrease in the phase velocity. However, when electrons with high velocities Vz≫νf are injected in plasma, they determine an energy transfer from the particles to the wave and an increase in the phase velocity, too.