Nonlinear waves in electron–positron–ion plasmas including charge separation

Nonlinear low-frequency electrostatic waves in a magnetized, three-component plasma consisting of hot electrons, hot positrons and warm ions have been investigated. The electrons and positrons are assumed to have Boltzmann density distributions while the motion of the ions are governed by fluid equa...

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Bibliographic Details
Published in:Pramāṇa 2017-02, Vol.88 (2), p.1-8, Article 23
Main Authors: Mugemana, A, Moolla, S, Lazarus, I J
Format: Article
Language:English
Subjects:
Astronomy
Astrophysics and Astroparticles
Density
Drift
Electric fields
Electrostatic waves
Hot electrons
Ion temperature
Mach number
Observations and Techniques
Physics
Physics and Astronomy
Poisson equation
Positrons
Satellite observation
Waveforms
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Summary:Nonlinear low-frequency electrostatic waves in a magnetized, three-component plasma consisting of hot electrons, hot positrons and warm ions have been investigated. The electrons and positrons are assumed to have Boltzmann density distributions while the motion of the ions are governed by fluid equations. The system is closed with the Poisson equation. This set of equations is numerically solved for the electric field. The effects of the driving electric field, ion temperature, positron density, ion drift, Mach number and propagation angle are investigated. It is shown that depending on the driving electric field, ion temperature, positron density, ion drift, Mach number and propagation angle, the numerical solutions exhibit waveforms that are sinusoidal, sawtooth and spiky. The introduction of the Poisson equation increased the Mach number required to generate the waveforms but the driving electric field E 0 was reduced. The results are compared with satellite observations.
ISSN:0304-4289
0973-7111
DOI:10.1007/s12043-016-1332-5