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Title: Existence domains of slow and fast ion-acoustic solitons in two-ion space plasmas

A study of large amplitude ion-acoustic solitons is conducted for a model composed of cool and hot ions and cool and hot electrons. Using the Sagdeev pseudo-potential formalism, the scope of earlier studies is extended to consider why upper Mach number limitations arise for slow and fast ion-acoustic solitons. Treating all plasma constituents as adiabatic fluids, slow ion-acoustic solitons are limited in the order of increasing cool ion concentrations by the number densities of the cool, and then the hot ions becoming complex valued, followed by positive and then negative potential double layer regions. Only positive potentials are found for fast ion-acoustic solitons which are limited only by the hot ion number density having to remain real valued. The effect of neglecting as opposed to including inertial effects of the hot electrons is found to induce only minor quantitative changes in the existence regions of slow and fast ion-acoustic solitons.
Authors:
 [1] ;  [2] ; ;  [3]
  1. South African National Space Agency (SANSA) Space Science, P.O. Box 32, Hermanus 7200 (South Africa)
  2. University of the Western Cape, Robert Sobukwe Road, Bellville, 7535 (South Africa)
  3. Indian Institute of Geomagnetism, New Panvel (West), Navi Mumbai 410218 (India)
Publication Date:
OSTI Identifier:
22408202
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physics of Plasmas; Journal Volume: 22; Journal Issue: 3; 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; CONCENTRATION RATIO; ELECTRONS; ION ACOUSTIC WAVES; ION DENSITY; IONS; MACH NUMBER; PLASMA; SOLITONS