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Cut-off conditions and existence domains for large-amplitude ion-acoustic solitons and double layers in fluid plasmas

Published online by Cambridge University Press:  13 March 2009

S. Baboolal ,
R. Bharuthram  and
M. A. Hellberg
S. Baboolal
Affiliation:
Department of Applied Mathematics, University of Durban-Westville, Private Bag X54001, Durban 4000, South Africa
R. Bharuthram
Affiliation:
Department of Physics, University of Durban-Westville, Private Bag X54001, Durban 4000, South Africa
M. A. Hellberg
Affiliation:
Plasma Physics Research Institute, Department of Physics, University of Natal, King George V Avenue, Durban 4001, South Africa
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Abstract

It is shown how existence domains for arbitrary-amplitude ion-acoustic solitons and double layers are determined numerically by cut-off conditions on the corresponding Sagdeev potential. A two-electron-temperature model is considered, and in positive-ion plasmas the cut-off conditions are given in terms of the electron parameters, while for negative-ion plasmas such conditions are described in terms of parameters characterizing the role of the negative ion species.

Type
Research Article
Information
Journal of Plasma Physics , Volume 44 , Issue 1 , August 1990 , pp. 1 - 23
Copyright
Copyright © Cambridge University Press 1990

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