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Title: Standing electromagnetic solitons in hot ultra-relativistic electron-positron plasmas

Using a one-dimensional self-consistent fluid model, we investigate standing relativistic bright solitons in hot electron-positron plasmas. The positron dynamics is taken into account. A set of nonlinear coupled differential equations describing the evolution of electromagnetic waves in fully relativistic two-fluid plasma is derived analytically and solved numerically. As a necessary condition for the existence of standing solitons the system should be relativistic. For the case of ultra-relativistic plasma, we investigate non-drifting bright solitary waves. Detailed discussions of the acceptable solutions are presented. New single hump non-trivial symmetric solutions for the scalar potential were found, and single and multi-nodal symmetric and anti-symmetric solutions for the vector potential are presented. It is shown that for a fixed value of the fluid velocity excited modes with more zeros in the profile of the vector potential show a higher magnitude for the scalar potential. An increase in the plasma fluid velocity also increases the magnitude of the scalar potential. Furthermore, the Hamiltonian and the first integral of the system are given.
Authors:
 [1] ;  [2] ;  [3] ;  [4]
  1. Department of Sciences, Bushehr Branch, Islamic Azad University, Bushehr (Iran, Islamic Republic of)
  2. Plasma Physics Research Centre, Science and Research Branch, Islamic Azad University, P.O. Box 14665-678, Tehran (Iran, Islamic Republic of)
  3. Physics Department, Iran University of Science and Technology (IUST), P.O. Box 1684613114, Tehran (Iran, Islamic Republic of)
  4. Department of Physics, Faculty of Science, University of Qom, Qom (Iran, Islamic Republic of)
Publication Date:
OSTI Identifier:
22251905
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physics of Plasmas; Journal Volume: 21; Journal Issue: 3; Other Information: (c) 2014 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; DIFFERENTIAL EQUATIONS; ELECTRONS; FLUIDS; HAMILTONIANS; MATHEMATICAL SOLUTIONS; POSITRONS; POTENTIALS; RELATIVISTIC PLASMA; RELATIVISTIC RANGE; SOLITONS