Langmuir wave interaction with ion acoustic wave

The conversion of the Langmuir wave on the ion-acoustic wave leads to the excitation of Langmuir wave modes. The damping of the electric field is determined by the trapping of the electrons by the main conversion modes and by the stochastic instability of the electron motion (the stochastic layers formation). The evolution of the stochastic layers of the conversion modes leads to the acceleration of a part of the electrons and to the formation of the short tails of the velocity distribution function. The evolution of the large scale stochasticity leads to the heating of the main part of the electrons. 10 refs.; 33 figs