Head-on collisional effects of ion acoustic waves in pair-ion plasma: topological and non-topological solitons

M. S. Alam; M. R. Talukder

doi:10.1140/epjd/s10053-020-00006-2

EPJ

Head-on collisional effects of ion acoustic waves in pair-ion plasma: topological and non-topological solitons

M. S. Alam¹^a and M. R. Talukder²

¹ 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

Received: 17 May 2020
Accepted: 2 November 2020
Published online: 21 January 2021

Abstract

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 (

H^{+}

$H^{+}$ ,

{Xe}^{+}

${Xe}^{+}$ and

K^{+}

$K^{+}$ ) and negative (

H^{-}

$H^{-}$ ,

{SF}_{6}^{-}

${SF}_{6}^{-}$ ,

O_{2}^{-}

$O_{2}^{-}$ and

C_{7} F_{14}^{-}

$C_{7}F_{14}^{-}$ ) 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

K^{+} - C_{7} F_{14}^{-}

$K^{+}-C_{7}F_{14}^{-}$ 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.

12 Internat. Congress of the Balkan Physical Union
July 8-12, 2025
Bucharest, Romania

EPJ

Head-on collisional effects of ion acoustic waves in pair-ion plasma: topological and non-topological solitons

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