Nonlinear electron acoustic waves in presence of shear magnetic field

Journal Article · Sun Dec 15 00:00:00 EST 2013 · Physics of Plasmas

DOI:https://doi.org/10.1063/1.4848717· OSTI ID:22218322

Dutta, Manjistha; Khan, Manoranjan ^[1]; Ghosh, Samiran ^[2]; Chakrabarti, Nikhil ^[3]

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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)

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.

• OSTI ID: 22218322
• Journal Information: Physics of Plasmas, Vol. 20, Issue 12; Other Information: (c) 2013 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 1070-664X
• Country of Publication: United States
• Language: English

Related Subjects

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