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Title: Propagation of three-dimensional electron-acoustic solitary waves

Abstract

Theoretical investigation is carried out for understanding the properties of three-dimensional electron-acoustic waves propagating in magnetized plasma whose constituents are cold magnetized electron fluid, hot electrons obeying nonthermal distribution, and stationary ions. For this purpose, the hydrodynamic equations for the cold magnetized electron fluid, nonthermal electron density distribution, and the Poisson equation are used to derive the corresponding nonlinear evolution equation, Zkharov-Kuznetsov (ZK) equation, in the small- but finite- amplitude regime. The ZK equation is solved analytically and it is found that it supports both solitary and blow-up solutions. It is found that rarefactive electron-acoustic solitary waves strongly depend on the density and temperature ratios of the hot-to-cold electron species as well as the nonthermal electron parameter. Furthermore, there is a critical value for the nonthermal electron parameter, which decides whether the electron-acoustic solitary wave's amplitude is decreased or increased by changing various plasma parameters. Importantly, the change of the propagation angles leads to miss the balance between the nonlinearity and dispersion; hence, the localized pulses convert to explosive/blow-up pulses. The relevance of this study to the nonlinear electron-acoustic structures in the dayside auroral zone in the light of Viking satellite observations is discussed.

Authors:
;  [1];  [2];  [2]
  1. Faculty of Science, Department of Physics, Ain Shams University, Cairo (Egypt)
  2. Theoretical Physics Group, Faculty of Science, Department of Physics, Mansoura University, Damietta Branch, New Damietta 34517 (Egypt)
Publication Date:
OSTI Identifier:
21546949
Resource Type:
Journal Article
Journal Name:
Physics of Plasmas
Additional Journal Information:
Journal Volume: 18; Journal Issue: 6; Other Information: DOI: 10.1063/1.3598185; (c) 2011 American Institute of Physics; Journal ID: ISSN 1070-664X
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; ELECTRON DENSITY; ELECTRON PLASMA WAVES; ELECTRON TEMPERATURE; ION TEMPERATURE; MAGNETOHYDRODYNAMICS; NONLINEAR PROBLEMS; POISSON EQUATION; SOLITONS; THREE-DIMENSIONAL CALCULATIONS; WAVE PROPAGATION; DIFFERENTIAL EQUATIONS; EQUATIONS; FLUID MECHANICS; HYDRODYNAMICS; MECHANICS; PARTIAL DIFFERENTIAL EQUATIONS; PLASMA WAVES; QUASI PARTICLES

Citation Formats

Shalaby, M, El-Sherif, L S, El-Labany, S K, Sabry, R, and Physics Department, College of Science and Humanitarian Studies, Alkharj University, Alkharj. Propagation of three-dimensional electron-acoustic solitary waves. United States: N. p., 2011. Web. doi:10.1063/1.3598185.
Shalaby, M, El-Sherif, L S, El-Labany, S K, Sabry, R, & Physics Department, College of Science and Humanitarian Studies, Alkharj University, Alkharj. Propagation of three-dimensional electron-acoustic solitary waves. United States. doi:10.1063/1.3598185.
Shalaby, M, El-Sherif, L S, El-Labany, S K, Sabry, R, and Physics Department, College of Science and Humanitarian Studies, Alkharj University, Alkharj. Wed . "Propagation of three-dimensional electron-acoustic solitary waves". United States. doi:10.1063/1.3598185.
@article{osti_21546949,
title = {Propagation of three-dimensional electron-acoustic solitary waves},
author = {Shalaby, M and El-Sherif, L S and El-Labany, S K and Sabry, R and Physics Department, College of Science and Humanitarian Studies, Alkharj University, Alkharj},
abstractNote = {Theoretical investigation is carried out for understanding the properties of three-dimensional electron-acoustic waves propagating in magnetized plasma whose constituents are cold magnetized electron fluid, hot electrons obeying nonthermal distribution, and stationary ions. For this purpose, the hydrodynamic equations for the cold magnetized electron fluid, nonthermal electron density distribution, and the Poisson equation are used to derive the corresponding nonlinear evolution equation, Zkharov-Kuznetsov (ZK) equation, in the small- but finite- amplitude regime. The ZK equation is solved analytically and it is found that it supports both solitary and blow-up solutions. It is found that rarefactive electron-acoustic solitary waves strongly depend on the density and temperature ratios of the hot-to-cold electron species as well as the nonthermal electron parameter. Furthermore, there is a critical value for the nonthermal electron parameter, which decides whether the electron-acoustic solitary wave's amplitude is decreased or increased by changing various plasma parameters. Importantly, the change of the propagation angles leads to miss the balance between the nonlinearity and dispersion; hence, the localized pulses convert to explosive/blow-up pulses. The relevance of this study to the nonlinear electron-acoustic structures in the dayside auroral zone in the light of Viking satellite observations is discussed.},
doi = {10.1063/1.3598185},
journal = {Physics of Plasmas},
issn = {1070-664X},
number = 6,
volume = 18,
place = {United States},
year = {2011},
month = {6}
}