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Title: On the fully nonlinear acoustic waves in a plasma with positrons beam impact and superthermal electrons

Arbitrary amplitude ion-acoustic waves in an unmagnetized plasma consisting of cold positive ions, superthermal electrons, and positrons beam are reported. The basic set of fluid equations is reduced to an energy-balance like equation. The latter is numerically analyzed to examine the existence regions for solitary and shock waves. It is found that only solitary waves can propagate, however, the model cannot support shocks. The effects of superthermality and beam parameters (via, positrons concentration and streaming velocity) on the existence region, as well as solitary wave profile have been discussed.
Authors:
 [1] ;  [2] ;  [3] ; ;  [4]
  1. Theoretical Plasma Physics Division, PINSTECH, Nilore, 44000 Islamabad (Pakistan)
  2. (NCP), Shahdra Valley Road, 44000 Islamabad (Pakistan)
  3. (PIEAS), Islamabad (Pakistan)
  4. Department of Physics, Faculty of Science, Port Said University, Port Said 42521 (Egypt)
Publication Date:
OSTI Identifier:
22227858
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physics of Plasmas; Journal Volume: 20; Journal Issue: 8; Other Information: (c) 2013 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; BEAM-PLASMA SYSTEMS; CATIONS; CONCENTRATION RATIO; ELECTROMAGNETIC RADIATION; ELECTRONS; ION ACOUSTIC WAVES; NONLINEAR PROBLEMS; NUMERICAL ANALYSIS; PLASMA FLUID EQUATIONS; POSITRON BEAMS; POSITRONS; SHOCK WAVES; SOLITONS; SOUND WAVES; WAVE PROPAGATION