Head-on collision of ion-acoustic solitons in collisional pair ions plasmas with non-Maxwellian electrons

Abstract

The head-on collisional phenomena concerning ion acoustic waves are investigated considering collisional plasma system comprises of pair ions and hybrid non-Maxwellian electrons. The two-sided Korteweg–de Vries (KdV) equations are derived using extended poincaré-Lighthill-Kuo (ePLK) method. The effects of superthermal index ( κ e ) related to kappa distributed electrons, nonthermal parameter ( β e ) related to the Cairn’s distributed electrons, density ratio of electron to positive ion ( n e 1 i ), and temperature ratio ( T 1 i 2 i ) of positive to negative ion on the phase velocity, spatiotemporal evolutions of amplitude, width, time dependent phase shifts and velocity of the right propagating solitons as well as the production of KdV solitons are investigated. Both the rarefactive and compressive soliton structures are produced due to head-on collision depending on plasma parameters. It is found that phase velocity is increasing (decreasing) due to the enhancement of κ e and β e ( n e 1 i ). The amplitude of right traveling soliton increases (decreases) with increasing β e ( κ e ), while κ e and β e show opposite characteristic behaviors due to the plasma parameters concerned.