Coherent nonlinear interaction of waves in the collisional plasma

A. V. Volosevich

doi:10.1117/12.751415

17 July 2007 Coherent nonlinear interaction of waves in the collisional plasma

A. V. Volosevich

Proceedings Volume 6725, ICONO 2007: Nonlinear Space-Time Dynamics; 672516 (2007) https://doi.org/10.1117/12.751415
Event: The International Conference on Coherent and Nonlinear Optics, 2007, Minsk, Belarus

Abstract

The coherent nonlinear interaction of three-four electrostatic waves is considered analytically and numerically. The excitation and nonlinear evolution of the electrostatic two-stream or Farley-Buneman (FB) plasma instabilities in the collisional plasma are investigated. Basing on the magnetohydrodynamics (MHD) system equations for collisional plasmas with magnetized electrons and non-magnetized ions, the evolution equations for the electron density are obtained.. It is shown that three-four wave coherent interaction is one of the effective physical mechanism which leads to nonlinear stabilization of the growing high-frequency waves and to the formation of local density structures of the charged particles. The different scenarios of the stabilization of the two-stream instability (as a periodic, multi-periodic, nonlinear cnoidal, shock waves and quasi-stochastic behavior) are possible in the collisional plasma. If the plasma system is in the weakly supercritical regime, the explosive instability may also occur. The different examples of the nonlinear temporal evolution of the FB instability are represented. The result of the numerical models allows analyzing feasibility of scenarios of the two-stream plasma instability in the plasma.

Citation Download Citation

A. V. Volosevich "Coherent nonlinear interaction of waves in the collisional plasma", Proc. SPIE 6725, ICONO 2007: Nonlinear Space-Time Dynamics, 672516 (17 July 2007); https://doi.org/10.1117/12.751415

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