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Ion-acoustic envelope excitations in multispecies plasma with non-thermally distributed electrons

Published online by Cambridge University Press:  06 February 2012

PARVEEN BALA ,
TARSEM SINGH GILL  and
HARVINDER KAUR
PARVEEN BALA
Affiliation:
Deparment of Math. Stat. & Physics, Punjab Agricultural University, Ludhiana-141004, India ([email protected])
TARSEM SINGH GILL
Affiliation:
Deparment of Physics, Guru Nanak Dev University, Amritsar-143005, India
HARVINDER KAUR
Affiliation:
Deparment of Physics, Khalsa College, Amritsar-143002, India
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Abstract

By using the standard reductive perturbation technique, a nonlinear Schrödinger equation is derived to study the stability of finite amplitude ion-acoustic waves in an unmagnetized plasma consisting of warm positive and negative ions and non-thermal electrons. The effect of relative temperature of positive and negative ions, their charge and mass ratios, density ratios and non-thermally distributed electrons on modulational instability of fast and slow ion-acoustic mode is investigated. It is found that these parameters significantly change the domain of modulation instability. Both, envelope and dark solitons appear in different regions of parameter space.

Type
Papers
Information
Journal of Plasma Physics , Volume 78 , Issue 3 , June 2012 , pp. 265 - 278
Copyright
Copyright © Cambridge University Press 2012

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