skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Arbitrary amplitude fast electron-acoustic solitons in three-electron component space plasmas

Abstract

We examine the characteristics of fast electron-acoustic solitons in a four-component unmagnetised plasma model consisting of cool, warm, and hot electrons, and cool ions. We retain the inertia and pressure for all the plasma species by assuming adiabatic fluid behaviour for all the species. By using the Sagdeev pseudo-potential technique, the allowable Mach number ranges for fast electron-acoustic solitary waves are explored and discussed. It is found that the cool and warm electron number densities determine the polarity switch of the fast electron-acoustic solitons which are limited by either the occurrence of fast electron-acoustic double layers or warm and hot electron number density becoming unreal. For the first time in the study of solitons, we report on the coexistence of fast electron-acoustic solitons, in addition to the regular fast electron-acoustic solitons and double layers in our multi-species plasma model. Our results are applied to the generation of broadband electrostatic noise in the dayside auroral region.

Authors:
;  [1];  [2];  [3]; ;  [4];  [2]
  1. South African National Space Agency (SANSA) Space Science, P.O. Box 32, Hermanus 7200, Republic of South Africa (South Africa)
  2. (UWC), Robert Sobukwe Road, Bellville 7535, Republic of South Africa (South Africa)
  3. Department of Physics, University of the Western Cape (UWC), Robert Sobukwe Road, Bellville 7535, Republic of South Africa (South Africa)
  4. Indian Institute of Geomagnetism, New Panvel (West), Navi Mumbai 410218 (India)
Publication Date:
OSTI Identifier:
22598982
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physics of Plasmas; Journal Volume: 23; Journal Issue: 6; Other Information: (c) 2016 Author(s); Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; AMPLITUDES; DENSITY; ELECTRONS; FLUIDS; IONS; LAYERS; MACH NUMBER; MOMENT OF INERTIA; NOISE; PLASMA; SOLITONS; SPACE; SWITCHES

Citation Formats

Mbuli, L. N., Maharaj, S. K., Department of Physics, University of the Western Cape, Bharuthram, R., Singh, S. V., Lakhina, G. S., and Department of Physics, University of the Western Cape. Arbitrary amplitude fast electron-acoustic solitons in three-electron component space plasmas. United States: N. p., 2016. Web. doi:10.1063/1.4952637.
Mbuli, L. N., Maharaj, S. K., Department of Physics, University of the Western Cape, Bharuthram, R., Singh, S. V., Lakhina, G. S., & Department of Physics, University of the Western Cape. Arbitrary amplitude fast electron-acoustic solitons in three-electron component space plasmas. United States. doi:10.1063/1.4952637.
Mbuli, L. N., Maharaj, S. K., Department of Physics, University of the Western Cape, Bharuthram, R., Singh, S. V., Lakhina, G. S., and Department of Physics, University of the Western Cape. Wed . "Arbitrary amplitude fast electron-acoustic solitons in three-electron component space plasmas". United States. doi:10.1063/1.4952637.
@article{osti_22598982,
title = {Arbitrary amplitude fast electron-acoustic solitons in three-electron component space plasmas},
author = {Mbuli, L. N. and Maharaj, S. K. and Department of Physics, University of the Western Cape and Bharuthram, R. and Singh, S. V. and Lakhina, G. S. and Department of Physics, University of the Western Cape},
abstractNote = {We examine the characteristics of fast electron-acoustic solitons in a four-component unmagnetised plasma model consisting of cool, warm, and hot electrons, and cool ions. We retain the inertia and pressure for all the plasma species by assuming adiabatic fluid behaviour for all the species. By using the Sagdeev pseudo-potential technique, the allowable Mach number ranges for fast electron-acoustic solitary waves are explored and discussed. It is found that the cool and warm electron number densities determine the polarity switch of the fast electron-acoustic solitons which are limited by either the occurrence of fast electron-acoustic double layers or warm and hot electron number density becoming unreal. For the first time in the study of solitons, we report on the coexistence of fast electron-acoustic solitons, in addition to the regular fast electron-acoustic solitons and double layers in our multi-species plasma model. Our results are applied to the generation of broadband electrostatic noise in the dayside auroral region.},
doi = {10.1063/1.4952637},
journal = {Physics of Plasmas},
number = 6,
volume = 23,
place = {United States},
year = {Wed Jun 15 00:00:00 EDT 2016},
month = {Wed Jun 15 00:00:00 EDT 2016}
}