Regular Article - Plasma Physics
Head-on collisional effects of ion acoustic waves in pair-ion plasma: topological and non-topological solitons
Department of Mathematics, Chittagong University of Engineering and Technology, 4349, Chittagong, Bangladesh
2 Plasma Science and Technology Lab, Department of Electrical and Electronic Engineering, University of Rajshahi, 6205, Rajshahi, Bangladesh
Accepted: 2 November 2020
Published online: 21 January 2021
The phenomena concerning head-on collision between the two topological and non-topological solitons are investigated in unmagnetized and collisionless plasma system consisting of weakly relativistic cold positive (, and ) and negative (, , and ) ion species with superthermal electrons. To do this, the two-sided Korteweg–de Vries (KdV) equations are derived using extended Poincaré–Lighthill–Kue method. The solutions of KdV equations are obtained by solitary ansatz technique. Productions as well as collisional effects of non-topological and topological solitons are investigated taking the experimentally obtained plasma parameters into accounts. The study reveals that the nonlinearity of non-topological solitons become more pronounced for plasma as compared to the other ionic species plasmas. The masses and densities of negative ion species play a vital role on the potential profiles of topological solitons. A new type large amplitude wave is produced in the colliding region due to collision depending on plasma parameters.
© EDP Sciences, SIF and Springer-Verlag GmbH Germany, part of Springer Nature 2021