Abstract

In the present investigation, authors have studied ion-acoustic waves in multispecies plasma consisting of cold positive and negative ions with q-nonextensive velocity distribution of electrons. Using standard Reductive Perturbation Theory, a nonlinear KdV equation is derived and analysis is made for different plasma system viz. H+H-, Ar+F- and H+O2-. Results of numerical computation for such plasma system have been shown in the form of graphs in different parameters regimes. It is observed that both rarefactive and compressive type of solitons exist for H+H- and Ar+F- plasma systems while only compressive type of solitons exist for H+O2- for the given parameter regime.

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