Sagdeev potential approach for large amplitude compressional Alfvenic double layers in viscous plasmas

Journal Article · Fri Nov 15 04:00:00 EST 2013 · Physics of Plasmas

DOI:https://doi.org/10.1063/1.4828700· OSTI ID:22218403

Panwar, Anuraj; Rizvi, H.; Ryu, C. M. ^[1]

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1. Department of Physics, POSTECH, Hyoja-Dong San 31, Pohang, KyungBuk 790-784 (Korea, Republic of)

Sagdeev’s technique is used to study the large amplitude compressional Alfvenic double layers in a magnetohydrodynamic plasma taking into account the small plasma β and small values of kinematic viscosity. Dispersive effect raised by non-ideal electron inertia currents perpendicular to the ambient magnetic field. The range of allowed values of the soliton speed, M (Mach number), plasma β (ratio of the plasma thermal pressure to the pressure in the confining magnetic field), and viscosity coefficient, wherein double layer may exist, are determined. In the absence of collisions, viscous dissipation modifies the Sagdeev potential and results in large amplitude compressional Alfvenic double layers. The depth of Sagdeev potential increases with the increasing Mach number and plasma β, however, decreases with the increasing viscosity. The double layer structure increases with the increasing plasma β, but decreases with increasing viscous dissipation μ(tilde sign)

• OSTI ID: 22218403
• Journal Information: Physics of Plasmas, Journal Name: Physics of Plasmas Journal Issue: 11 Vol. 20; ISSN PHPAEN; ISSN 1070-664X
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
ALFVEN WAVES
AMPLITUDES
BETA RATIO
ELECTRIC CURRENTS
ELECTRONS
MACH NUMBER
MAGNETIC FIELDS
MAGNETOHYDRODYNAMICS
MOMENT OF INERTIA
PLASMA CONFINEMENT
PLASMA POTENTIAL
PLASMA PRESSURE
PLASMA SHEATH
SOLITONS
VISCOSITY