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Title: Nonlinear electron acoustic waves in presence of shear magnetic field

Nonlinear electron acoustic waves are studied in a quasineutral plasma in the presence of a variable magnetic field. The fluid model is used to describe the dynamics of two temperature electron species in a stationary positively charged ion background. Linear analysis of the governing equations manifests dispersion relation of electron magneto sonic wave. Whereas, nonlinear wave dynamics is being investigated by introducing Lagrangian variable method in long wavelength limit. It is shown from finite amplitude analysis that the nonlinear wave characteristics are well depicted by KdV equation. The wave dispersion arising in quasineutral plasma is induced by transverse magnetic field component. The results are discussed in the context of plasma of Earth's magnetosphere.
Authors:
;  [1] ;  [2] ;  [3]
  1. Department of Instrumentation Science, Jadavpur University, Kolkata 700 032 (India)
  2. Department of Applied Mathematics, University of Calcutta 92, Acharya Prafulla Chandra Road, Kolkata 700 009 (India)
  3. Saha Institute of Nuclear Physics, 1/AF Bidhannagar, Kolkata 700 064 (India)
Publication Date:
OSTI Identifier:
22218322
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physics of Plasmas; Journal Volume: 20; Journal Issue: 12; 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; DISPERSION RELATIONS; EARTH MAGNETOSPHERE; ELECTRON PLASMA WAVES; ELECTRON TEMPERATURE; ELECTRONS; ION ACOUSTIC WAVES; IONS; KORTEWEG-DE VRIES EQUATION; LAGRANGIAN FUNCTION; MAGNETIC FIELDS; NONLINEAR PROBLEMS; PLASMA FLUID EQUATIONS; SHEAR