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The Effects of Warm Plasma and HF Electrical Field on Beam-Plasma Interaction in Plasma Waveguide

 Abstract — We investigated in this paper the stabilizing effects of warm plasma and a strong HF electrical field on a two-stream (Buneman) instability in a plane and cylindrical plasma waveguide. Starting from the two-fluid plasma model to separate the problem into two parts, temporal and space. Plasma electrons are considered to have a thermal velocity. It is shown that independent of the geometry of the problem the conclusion on the HF stabilization of Buneman instability in a plasma waveguide remains valid and the growth rate of the instability in warm plasma has been reduced compared to that of cold plasma. The influence of HF electric field on the instability of a low-density electron beam passing through warm plasma waveguide is also reported. in the problem of parametric interaction of HF field with electrostatic surface waves in an isotropic bounded warm plasma. The method it possible to separate the problem into two parts. The ―dynamical‖ (temporal) part enables the frequencies and growth rates of unstable oscillations to be found and corresponding equations within