Study of large amplitude solitons in multispecies plasma with non-Maxwellian electrons

Abstract

In this investigation, authors study the propagation of ion-acoustic solitons in a plasma consisting of multispecies with different concentration of masses, charged states, and non-Maxwellian electrons. In the small amplitude approach the reductive perturbation method is used to derive the evolution equation such as Korteweg de-Vries (KdV). The present method, Sagdeev pseudopotential deals with the full nonlinearity of plasma equations. The potential so obtained is general in nature and valid for the large amplitude waves is characterized for solitons as a function of Mach number, temperature of different species, distribution of electrons, different concentration of species over a wide range of parameter space. In the small amplitude approach, we may also obtained KdV solitons. The compressive and rarefactive solitons are observed for the certain set of parameters.