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

Abstract

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.

Authors:
 [1];  [2];  [1];  [3];  [4]
  1. COMSATS Institute of Information Technology, Park Road, Chak Shahzad, Islamabad (Pakistan)
  2. (Pakistan)
  3. Theoretical Plasma Physics Group, Department of Physics, Quaid-i-Azam University, Islamabad 45320 (Pakistan)
  4. National Centre for Physics, Shahdara Valley Road, Islamabad (Pakistan)
Publication Date:
OSTI Identifier:
22599863
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physics of Plasmas; Journal Volume: 23; Journal Issue: 9; Other Information: (c) 2016 Author(s); Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; 71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; APPROXIMATIONS; COLLISIONS; ELECTRONS; ION ACOUSTIC WAVES; ION DRIFT; NONLINEAR PROBLEMS; ONE-DIMENSIONAL CALCULATIONS; PLASMA; SHOCK WAVES; TWO-DIMENSIONAL CALCULATIONS; VELOCITY; WAVE PROPAGATION

Citation Formats

Masood, W., National Centre for Physics, Shahdara Valley Road, Islamabad, Zahoor, Sara, Gul-e-Ali, and Ahmad, Ali, E-mail: aliahmad79@hotmail.com. Existence regimes for the formation of nonlinear dissipative structures in inhomogeneous magnetoplasmas with non-Maxwellian electrons. United States: N. p., 2016. Web. doi:10.1063/1.4961921.
Masood, W., National Centre for Physics, Shahdara Valley Road, Islamabad, Zahoor, Sara, Gul-e-Ali, & Ahmad, Ali, E-mail: aliahmad79@hotmail.com. Existence regimes for the formation of nonlinear dissipative structures in inhomogeneous magnetoplasmas with non-Maxwellian electrons. United States. doi:10.1063/1.4961921.
Masood, W., National Centre for Physics, Shahdara Valley Road, Islamabad, Zahoor, Sara, Gul-e-Ali, and Ahmad, Ali, E-mail: aliahmad79@hotmail.com. Thu . "Existence regimes for the formation of nonlinear dissipative structures in inhomogeneous magnetoplasmas with non-Maxwellian electrons". United States. doi:10.1063/1.4961921.
@article{osti_22599863,
title = {Existence regimes for the formation of nonlinear dissipative structures in inhomogeneous magnetoplasmas with non-Maxwellian electrons},
author = {Masood, W. and National Centre for Physics, Shahdara Valley Road, Islamabad and Zahoor, Sara and Gul-e-Ali and Ahmad, Ali, E-mail: aliahmad79@hotmail.com},
abstractNote = {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.},
doi = {10.1063/1.4961921},
journal = {Physics of Plasmas},
number = 9,
volume = 23,
place = {United States},
year = {Thu Sep 15 00:00:00 EDT 2016},
month = {Thu Sep 15 00:00:00 EDT 2016}
}