Finite-amplitude electrostatic waves im magneto-active plasmas |
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Authors: | L. Martina |
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Affiliation: | (1) Centre de Recherches Mathématiques, Université de Montréal, Succ. A, C.P. 6128, H3C 3J7 Montréal, Québec;(2) Present address: Dipartimento di Fisica, Università degli Studi di Lecce, Lecce, Italia |
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Abstract: | Summary Weakly nonlinear dispersive longitudinal waves in an infinite homogeneous collisionless plasma in the presence of an external constant and uniform magnetic field are considered. Under specific physical assumptions and for an arbitrary three-dimensional envelope modulation of a plane wave, a purely differential system is derived. Taking into account the effect of wave-wave and wave-particle interaction, the evolution of the modulation is described by a modified nonlinear Schr?dinger equation, coupled to the space perturbation charge densities. The generation of a static mode is described. As a particular case the electron waves are discussed and some special solutions, resorting to the theory of the perturbed solitions. |
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Keywords: | Nonlinear waves and nonlinear wave propagation (including parametric effects mode coupling ponderomotive effects etc.) |
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