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Electrostatic solitary structures in a charge-varying pair–ion–dust plasma

Published online by Cambridge University Press:  01 June 2007

MOULOUD TRIBECHE,
LEILA AIT GOUGAM,
NADIA BOUBAKOUR and
TAHA HOUSSINE ZERGUINI
MOULOUD TRIBECHE
Affiliation:
Faculty of Sciences-Physics, Theoretical Physics Laboratory, University of Bab-Ezzouar, USTHB, B.P. 32, El Alia, Algiers 16111, Algeria
LEILA AIT GOUGAM
Affiliation:
Faculty of Sciences-Physics, Theoretical Physics Laboratory, University of Bab-Ezzouar, USTHB, B.P. 32, El Alia, Algiers 16111, Algeria
NADIA BOUBAKOUR
Affiliation:
Faculty of Sciences-Physics, Theoretical Physics Laboratory, University of Bab-Ezzouar, USTHB, B.P. 32, El Alia, Algiers 16111, Algeria
TAHA HOUSSINE ZERGUINI
Affiliation:
Faculty of Sciences-Physics, Theoretical Physics Laboratory, University of Bab-Ezzouar, USTHB, B.P. 32, El Alia, Algiers 16111, Algeria
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Abstract

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Large-amplitude electrostatic solitary structures are investigated in an unmagnetized charge-varying pair–ion–dust plasma in which electrons and positrons have equal masses. Their spatial patterns are significantly modified by the presence of the positron component. In particular, it may be noted that an addition of a small concentration of positrons abruptly reduces the potential pulse amplitude as well as the net negative charge residing on the dust grain surface. Under certain conditions, the solitary wave suffers the well-known anomalous damping leading to the development of collisionless shock waves. This investigation may be taken as a prerequisite for the understanding of the electrostatic solitary waves that may occur in space dusty plasmas.

Information

Type
Papers
Information
Journal of Plasma Physics , Volume 73 , Issue 3 , June 2007, pp. 403 - 415
Copyright
Copyright © Cambridge University Press 2006

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