Existence regimes for the formation of nonlinear dissipative structures in inhomogeneous magnetoplasmas with non-Maxwellian electrons

Nonlinear dissipative structures are studied in one and two dimensions in nonuniform magnetized plasmas with non-Maxwellian electrons. The dissipation is incorporated in the system through ion-neutral collisions. Employing the drift approximation, nonlinear drift waves are derived in 1D, whereas cou...

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Bibliographic Details
Published in:Physics of plasmas 2016-09, Vol.23 (9)
Main Authors: Masood, W., Zahoor, Sara, Gul-e-Ali, Ahmad, Ali
Format: Article
Language:English
Subjects:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY
Acoustic coupling
APPROXIMATIONS
CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS
COLLISIONS
Diamagnetism
Drift
ELECTRONS
ION ACOUSTIC WAVES
ION DRIFT
Lower bounds
NONLINEAR PROBLEMS
Nonlinearity
ONE-DIMENSIONAL CALCULATIONS
PLASMA
Plasma physics
Plasmas (physics)
SHOCK WAVES
TWO-DIMENSIONAL CALCULATIONS
VELOCITY
WAVE PROPAGATION
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Summary:Nonlinear dissipative structures are studied in one and two dimensions in nonuniform magnetized plasmas with non-Maxwellian electrons. The dissipation is incorporated in the system through ion-neutral collisions. Employing the drift approximation, nonlinear drift waves are derived in 1D, whereas coupled drift-ion acoustic waves are derived in 2D in the weak nonlinearity limit. It is found that the ratio of the diamagnetic drift velocity to the velocity of nonlinear structure determines the nature (compressive or rarefactive) of the shock structure. The upper and lower bounds for velocity of the nonlinear shock structures are also found. It is noticed that the existence regimes for the drift shock waves in one and two dimensions for Cairns distributed electrons are very distinct from those with kappa distributed electrons. Interestingly, it is found that both compressive and rarefactive shock structures could be obtained for the one dimensional drift waves with kappa distributed electrons.
ISSN:1070-664X
1089-7674
DOI:10.1063/1.4961921