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

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)
Authors:
; ;  [1]
  1. Department of Physics, POSTECH, Hyoja-Dong San 31, Pohang, KyungBuk 790-784 (Korea, Republic of)
Publication Date:
OSTI Identifier:
22218403
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physics of Plasmas; Journal Volume: 20; Journal Issue: 11; Other Information: (c) 2013 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
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