Head-on collision of two ion-acoustic solitary waves in plasmas with electrons described by Tsallis distribution

Abderrzak Merriche, Leila Ait Gougam and Mouloud Tribeche

Physica A: Statistical Mechanics and its Applications, 2016, vol. 442, issue C, 409-416

Abstract: The problem of the head-on collision of two ion-acoustic solitary waves (IASWs) is addressed in electronegative plasmas with a nonextensive electron velocity distribution. Our plasma model is inspired from the experimental studies of Ichiki et al. (2001). Using the extended Poincare–Lighthill–Kuo (PLK) perturbation method, the phase shifts of the head-on collision are obtained. Analytical and numerical results reveal that the magnitude of the phase shift of the IASWs depends sensitively on the number density ratios μ and υ, the mass ratio σ as well as the nonextensive parameter q. For a given mass ratio σ≃0.27 (Ar+−SF6−), the magnitude of the phase shift increases with an increase of the nonextensive parameter q. An increase of the electron-to-positive ion density ratio μ lowers the phase shift, a trend which is much perceptible for q>1. As σ increases [σ≃0.89 (Xe+−SF6−)], the phase shift becomes larger.

Keywords: Head-on collision; Ion-acoustic soliton; Electronegative plasmas; Nonextensive electrons; PLK perturbation method; Phase shifts (search for similar items in EconPapers)
Date: 2016
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Persistent link: https://EconPapers.repec.org/RePEc:eee:phsmap:v:442:y:2016:i:c:p:409-416

DOI: 10.1016/j.physa.2015.09.053

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