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Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
physics and astronomy
Fully nonlinear ion-acoustic solitary waves in a plasma with positive-negative ions and nonthermal electrons
Physics of Plasmas, Volume 16, No. 3, Article 032302, Year 2009
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Description
Properties of fully nonlinear ion-acoustic solitary waves in a plasma with positive-negative ions and nonthermal electrons are investigated. For this purpose, the hydrodynamic equations for the positive-negative ions, nonthermal electron density distribution, and the Poisson equation are used to derive the energy integral equation with a new Sagdeev potential. The latter is analyzed to examine the existence regions of the solitary pulses. It is found that the solitary excitations strongly depend on the mass and density ratios of the positive and negative ions as well as the nonthermal electron parameter. Numerical solution of the energy integral equation clears that both positive and negative potentials exist together. It is found that faster solitary pulses are taller and narrower. Furthermore, increasing the electron nonthermality parameter (negative-to-positive ions density ratio) decreases (increases) the localized excitation amplitude but increases (decreases) the pulse width. The present model is used to investigate the solitary excitations in the (H+, O2-) and (H+, H-) plasmas, where they are presented in the D- and F-regions of the Earth's ionosphere. This investigation should be helpful in understanding the salient features of the fully nonlinear ion-acoustic solitary waves in space and in laboratory plasmas where two distinct groups of ions and non-Boltzmann distributed electrons are present. © 2009 American Institute of Physics.
Authors & Co-Authors
Sabry, Refaat
Germany, Bochum
Ruhr-universitat Bochum
Egypt, Mansoura
Mansoura University
Moslem, Waleed M.
Egypt, Ismailia
Suez Canal University
Shukła, Padma Kant
Germany, Bochum
Ruhr-universitat Bochum
Sweden, Umea
Umeå Universitet
Germany, Garching Bei Munchen
Max Planck Institute for Extraterrestrial Physics
Portugal, Lisbon
Instituto Superior Técnico
United Kingdom, Didcot
Rutherford Appleton Laboratory
United Kingdom, Glasgow
University of Strathclyde
South Africa, Durban
University of Kwazulu-natal
Pakistan, Islamabad
Citt
Pakistan, Islamabad
Quaid-i-azam University
Statistics
Citations: 123
Authors: 3
Affiliations: 11
Identifiers
Doi:
10.1063/1.3088005
ISSN:
1070664X