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Propagation of solitary waves and shock wavelength in the pair plasma

Published online by Cambridge University Press:  22 February 2012

BEHROOZ MALEKOLKALAMI  and
TAIMUR MOHAMMADI
BEHROOZ MALEKOLKALAMI
Affiliation:
Department of Physics, University of Kurdistan, P.O. Box 66177-15175, Sanandaj, Iran ([email protected])
TAIMUR MOHAMMADI
Affiliation:
Department of Physics, University of Kurdistan, P.O. Box 66177-15175, Sanandaj, Iran ([email protected])
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Abstract

The propagation of electrostatic waves is studied in plasma system consisting of pair-ions and stationary additional ions in presence of the Sagdeev potential (pseudopotential) as function of electrostatic potential (pseudoparticle). It is remarked that both compressive and rarefective solitary waves can be propagated in this plasma system. These electrostatic solitary waves, however, cannot be propagated if the density of stationary ions increases from one critical value or decreases from another when the temperature and the Mach number are fixed. Also, when pseudoparticle is affected with a little dissipation of energy, it is trapped in potential well and can oscillate. Oscillations generate shock wave in the media, and in the negative minimal point of the well it is possible to compute numerically the shock wavelength for the allowed values of the plasma parameters.

Type
Papers
Information
Journal of Plasma Physics , Volume 78 , Issue 5 , October 2012 , pp. 525 - 529
Copyright
Copyright © Cambridge University Press 2012

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