Effects of positron and two ion masses on the critical behaviour in superthermal collisional plasmas

The Wave time dissipation characteristic of plasma solitons in a two ion-component fluids and two Kappa distributed electrons and positrons have been investigated. The damped-two dimensional Kadomtsev-Petviashvili (DKP) equation which embodied all wave damping information has been gained. The nonlinear condition for DKP criticality is calculated in the form of MDKP equation. By using D-F Earth-ionosphere regime parameters, the effects of the index of superthermality, collision frequencies, electron density, positron density and ionic mass ratios on the solitary formation of both structures of rarefactive (compressive) and critical waves are examined. It is a rating mention to signify that the outcomes performed here are applicable in the plasma of Earth's ionosphere.