Abstract
The excitation of a Langmuir plasma wave by a monoenergetic electron beam for which resonant interaction conditions hold is investigated within a hydrodynamic description of the plasma. It is shown that parametric and modulation effects lead to the formation of nonlinear stationary waves with a low-frequency soliton-like envelope in the plasma. The behavior of electrons in the field of the wave packet formed by Langmuir waves with different phase velocities is investigated. The level of stochasticity in the system and the relative level of plasma fluctuations are determined.
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