Nonlinear properties of electron acoustic wave turbulence in the geomagnetic tail |
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| Authors: | R Bharuthram P K Shukla |
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| Institution: | (1) Institut für Theoretische Physik, Ruhr-Universität, Bochum, F.R.G.;(2) Present address: University of Durban-Westville, Durban, South Africa;(3) Plasma Physics Research Institute, University of Natal, Durban, South Africa |
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| Abstract: | The nonlinear properties of electron acoustic waves in a magnetized plasma consisting of hot electrons, hot ions, and cold electrons are investigated. Using a fluid-guiding center model for the cold electrons and Boltzmann distributions for the hot species, a set of nonlinear mode-coupling equations is derived. Monopole and dipole-vortex solutions are shown to exist for the system of nonlinear equations. Spectrum cascade by mode-coupling in the electron acoustic wave turbulence is investigated. Relevance of our investigation to broadband electrostatic noise (BEN) in the geomagnetic tail is discussed. |
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