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

Journal Article · Thu Sep 15 04:00:00 EDT 2016 · Physics of Plasmas

DOI:https://doi.org/10.1063/1.4961921· OSTI ID:22599863

Masood, W. ^[1]; Zahoor, Sara ^[1]; Gul-e-Ali, ^[2]; Ahmad, Ali ^[3]

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1. COMSATS Institute of Information Technology, Park Road, Chak Shahzad, Islamabad (Pakistan)
2. Theoretical Plasma Physics Group, Department of Physics, Quaid-i-Azam University, Islamabad 45320 (Pakistan)
3. National Centre for Physics, Shahdara Valley Road, Islamabad (Pakistan)

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.

• OSTI ID: 22599863
• Journal Information: Physics of Plasmas, Journal Name: Physics of Plasmas Journal Issue: 9 Vol. 23; ISSN PHPAEN; ISSN 1070-664X
• Country of Publication: United States
• Language: English

Related Subjects

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