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Title: Ion- and electron-acoustic solitons in two-electron temperature space plasmas

Abstract

Properties of ion- and electron-acoustic solitons are investigated in an unmagnetized multicomponent plasma system consisting of cold and hot electrons and hot ions using the Sagdeev pseudopotential technique. The analysis is based on fluid equations and the Poisson equation. Solitary wave solutions are found when the Mach numbers exceed some critical values. The critical Mach numbers for the ion-acoustic solitons are found to be smaller than those for electron-acoustic solitons for a given set of plasma parameters. The critical Mach numbers of ion-acoustic solitons increase with the increase of hot electron temperature and the decrease of cold electron density. On the other hand, the critical Mach numbers of electron-acoustic solitons increase with the increase of the cold electron density as well as the hot electron temperature. The ion-acoustic solitons have positive potentials for the parameters considered. However, the electron-acoustic solitons have positive or negative potentials depending whether the fractional cold electron density with respect to the ion density is greater or less than a certain critical value. Further, the amplitudes of both the ion- and electron-acoustic solitons increase with the increase of the hot electron temperature. Possible application of this model to electrostatic solitary waves observed on the auroral fieldmore » lines by the Viking spacecraft is discussed.« less

Authors:
; ;  [1];  [2]
  1. Indian Institute of Geomagnetism, New Panvel (West), Navi Mumbai-410 218 (India)
  2. Sterrenkundig Observatorium, Universiteit Gent, Krijgslaan 281, B-9000 Gent (Belgium)
Publication Date:
OSTI Identifier:
21120452
Resource Type:
Journal Article
Journal Name:
Physics of Plasmas
Additional Journal Information:
Journal Volume: 15; Journal Issue: 6; Other Information: DOI: 10.1063/1.2930469; (c) 2008 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 1070-664X
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; AMPLITUDES; ASTROPHYSICS; ELECTRON DENSITY; ELECTRON TEMPERATURE; ELECTRONS; ION ACOUSTIC WAVES; ION DENSITY; ION TEMPERATURE; IONS; PLASMA; PLASMA DENSITY; POISSON EQUATION; POTENTIALS; SHOCK WAVES; SOLITONS; SPACE

Citation Formats

Lakhina, G S, Kakad, A P, Singh, S V, Verheest, F, and School of Physics, University of KwaZulu-Natal, Private Bag X54001, Durban 4000. Ion- and electron-acoustic solitons in two-electron temperature space plasmas. United States: N. p., 2008. Web. doi:10.1063/1.2930469.
Lakhina, G S, Kakad, A P, Singh, S V, Verheest, F, & School of Physics, University of KwaZulu-Natal, Private Bag X54001, Durban 4000. Ion- and electron-acoustic solitons in two-electron temperature space plasmas. United States. https://doi.org/10.1063/1.2930469
Lakhina, G S, Kakad, A P, Singh, S V, Verheest, F, and School of Physics, University of KwaZulu-Natal, Private Bag X54001, Durban 4000. 2008. "Ion- and electron-acoustic solitons in two-electron temperature space plasmas". United States. https://doi.org/10.1063/1.2930469.
@article{osti_21120452,
title = {Ion- and electron-acoustic solitons in two-electron temperature space plasmas},
author = {Lakhina, G S and Kakad, A P and Singh, S V and Verheest, F and School of Physics, University of KwaZulu-Natal, Private Bag X54001, Durban 4000},
abstractNote = {Properties of ion- and electron-acoustic solitons are investigated in an unmagnetized multicomponent plasma system consisting of cold and hot electrons and hot ions using the Sagdeev pseudopotential technique. The analysis is based on fluid equations and the Poisson equation. Solitary wave solutions are found when the Mach numbers exceed some critical values. The critical Mach numbers for the ion-acoustic solitons are found to be smaller than those for electron-acoustic solitons for a given set of plasma parameters. The critical Mach numbers of ion-acoustic solitons increase with the increase of hot electron temperature and the decrease of cold electron density. On the other hand, the critical Mach numbers of electron-acoustic solitons increase with the increase of the cold electron density as well as the hot electron temperature. The ion-acoustic solitons have positive potentials for the parameters considered. However, the electron-acoustic solitons have positive or negative potentials depending whether the fractional cold electron density with respect to the ion density is greater or less than a certain critical value. Further, the amplitudes of both the ion- and electron-acoustic solitons increase with the increase of the hot electron temperature. Possible application of this model to electrostatic solitary waves observed on the auroral field lines by the Viking spacecraft is discussed.},
doi = {10.1063/1.2930469},
url = {https://www.osti.gov/biblio/21120452}, journal = {Physics of Plasmas},
issn = {1070-664X},
number = 6,
volume = 15,
place = {United States},
year = {Sun Jun 15 00:00:00 EDT 2008},
month = {Sun Jun 15 00:00:00 EDT 2008}
}