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Weakly nonlinear ion-acoustic excitationsin a relativistic modelfor dense quantum plasma

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Weakly nonlinear ion-acoustic excitationsin a relativistic modelfor dense quantum plasma

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Título Weakly nonlinear ion-acoustic excitationsin a relativistic modelfor dense quantum plasma
Autor Behery, Ebraheem Ebraheem
Haas, Fernando
Kourakis, Ioannis
Abstract The dynamics of linear and nonlinear ionic-scale electrostatic excitations propagating in a magnetized relativistic quantum plasma is studied. A quantum-hydrodynamic model is adopted and degenerate statistics for the electrons is taken into account. The dispersion properties of linear ion acoustic waves are examined in detail. A modified characteristic charge screening length and “sound speed” are introduced, for relativistic quantum plasmas. By employing the reductive perturbation technique, a Zakharov-Kuznetzov-type equation is derived. Using the small-k expansion method, the stability profile of weakly nonlinear slightly supersonic electrostatic pulses is also discussed. The effect of electron degeneracy on the basic characteristics of electrostatic excitations is investigated. The entire analysis is valid in a three-dimensional as well as in two-dimensional geometry. A brief discussion of possible applications in laboratory and space plasmas is included.
Contido em Physical review. E, Statistical, nonlinear, and soft matter physics. Melville. Vol. 93, no. 2 (Feb. 2016), 023206, 9 p.
Assunto Eletrostatica
Ondas íon-acústicas em plasmas
Origem Estrangeiro
Tipo Artigo de periódico
URI http://hdl.handle.net/10183/141311
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