Nonplanar ion-acoustic solitary waves with superthermal electrons in warm plasma

Eslami, Parvin; Mottaghizadeh, Marzieh; Pakzad, Hamid Reza
July 2011
Physics of Plasmas;Jul2011, Vol. 18 Issue 7, p072305
Academic Journal
In this paper, we consider an unmagnetized plasma consisting of warm adiabatic ions, superthermal electrons, and thermal positrons. Nonlinear cylindrical and spherical modified Korteweg-de Vries (KdV) equations are derived for ion acoustic waves by using reductive perturbation technique. It is observed that an increasing positron concentration decreases the amplitude of the waves. Furthermore, the effects of the superthermal parameter (k) on the ion acoustic waves are found.


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