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Title: Arbitrary amplitude slow electron-acoustic solitons in three-electron temperature space plasmas

We examine the characteristics of large amplitude slow electron-acoustic solitons supported in a four-component unmagnetised plasma composed of cool, warm, hot electrons, and cool ions. The inertia and pressure for all the species in this plasma system are retained by assuming that they are adiabatic fluids. Our findings reveal that both positive and negative potential slow electron-acoustic solitons are supported in the four-component plasma system. The polarity switch of the slow electron-acoustic solitons is determined by the number densities of the cool and warm electrons. Negative potential solitons, which are limited by the cool and warm electron number densities becoming unreal and the occurrence of negative potential double layers, are found for low values of the cool electron density, while the positive potential solitons occurring for large values of the cool electron density are only limited by positive potential double layers. Both the lower and upper Mach numbers for the slow electron-acoustic solitons are computed and discussed.
Authors:
 [1] ;  [2] ;  [1] ;  [3] ; ;  [4]
  1. South African National Space Agency (SANSA) Space Science, P.O. Box 32, Hermanus 7200, Republic of South Africa (South Africa)
  2. (South Africa)
  3. University of the Western Cape, 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:
22490931
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physics of Plasmas; Journal Volume: 22; Journal Issue: 6; Other Information: (c) 2015 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; AMPLITUDES; ELECTRON DENSITY; ELECTRON PLASMA WAVES; ELECTRON TEMPERATURE; ELECTRONS; IONS; MOMENT OF INERTIA; PLASMA; SOLITONS