Electronegative nonlinear oscillating modes in plasmas

Chérif Souleman Panguetna, Conrad Bertrand Tabi, Timoléon Crépin Kofané

Research output: Contribution to journalArticle

15 Citations (Scopus)

Abstract

The emergence of nonlinear modulated waves is addressed in an unmagnetized electronegative plasma made of Boltzmann electrons, Boltzmann negative ions and cold mobile positive ions. The reductive perturbation method is used to reduce the dynamics of the whole system to a cubic nonlinear Schrödinger equation, whose the nonlinear and dispersion coefficients, P and Q, are function of the negative ion parameters, namely the negative ion concentration ratio (α) and the electron-to-negative ion temperature ratio (σn). It is observed that these parameters importantly affect the formation of modulated ion-acoustic waves, either as exact solutions or via the activation of modulational instability. Especially, the theory of modulational instability is used to show the correlation between the parametric analysis and the formation of modulated solitons, obtained here as bright envelopes and kink-wave solitons.
Original languageEnglish
Pages (from-to)326-337
Number of pages12
JournalCommunications in Nonlinear Science and Numerical Simulation
Volume55
DOIs
Publication statusPublished - Feb 1 2018

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