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Nonlinear equation for Farley–Buneman waves in multispecies plasma |
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| Authors: | S K Litt A I Smolyakov A S Bains O A Pokhotelov O G Onishchenko W Horton |
| Institution: | 1.Department of Physics and Engineering Physics,University of Saskatchewan, Saskatoon,Saskatchewan,Canada;2.National Research Centre Kurchatov Institute,Moscow,Russia;3.Schmidt Institute of Physics of the Earth,Russian Academy of Sciences,Moscow,Russia;4.Space Research Institute,Russian Academy of Sciences,Moscow,Russia;5.Institute for Fusion Studies,University of Texas at Austin,Austin,USA |
| Abstract: | The nonlinear equation describing the Farley–Buneman (FB) waves in multispecies collisional plasmas is derived by employing the multiple-scale reduction analysis. It is shown that the presence of several ion species with different collisionalities and different ion masses removes the degeneracy of the nonlinear equation and generates the nonlinear terms resulting in wave steepening and wave breaking. This effect may be responsible for formation of one-dimensional coherent FB waves of a finite amplitude. |
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