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Nonlinear dust–ion acoustic waves in a dusty plasma with non-extensive electrons and ions

Published online by Cambridge University Press:  08 February 2013

MUSTAPHA BACHA  and
MOULOUD TRIBECHE
MUSTAPHA BACHA
Affiliation:
Plasma Physics Group, Theoretical Physics Laboratory, Faculty of Sciences-Physics, University of Bab-Ezzouar, USTHB, B.P. 32, El Alia, Algiers 16111, Algeria ([email protected]; [email protected])
MOULOUD TRIBECHE
Affiliation:
Plasma Physics Group, Theoretical Physics Laboratory, Faculty of Sciences-Physics, University of Bab-Ezzouar, USTHB, B.P. 32, El Alia, Algiers 16111, Algeria ([email protected]; [email protected])
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Abstract

Using the reductive perturbation approach, dust–ion acoustic solitons and double layers (DLs) have been studied in a dust–electron–positron–ion (d-e-p-i) plasma composed of q-distributed electrons and positrons, warm fluid ions, and a fraction of immobile dust grains. Existence domains of either solitary waves or DLs are presented and their parametric dependence determined. It is found that particle non-extensivity, dust concentration and positron concentration may drastically affect these existence domains and may play a key role in defining the polarity of these localized structures. Our results should assist in interpreting the nonlinear structures that may occur in astrophysical environments.

Type
Papers
Information
Journal of Plasma Physics , Volume 79 , Issue 5 , October 2013 , pp. 569 - 576
Copyright
Copyright © Cambridge University Press 2013 

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