Modulation Instability of Ion-Acoustic Waves in Plasma with Nonthermal Electrons. (16th July 2014)

• Record Type: Journal Article
• Authors: Ghosh, Basudev; Banerjee, Sreyasi
• Other Names: Dimitrijevic Milan S. Academic Editor.
• Is Part Of: Journal of astrophysics. Volume 2014(2014)
• Publication Date: 2014-07-16
• Subjects: Astrophysics -- Periodicals; Astrophysics; Periodicals; 523.01
• DOI: 10.1155/2014/785670
• Languages: English
• ISSNs: 2356-718X

Abstract

Abstract : Modulational instability of ion-acoustic waves has been theoretically investigated in an unmagnetized collisionless plasma with nonthermal electrons, Boltzmann positrons, and warm positive ions. To describe the nonlinear evolution of the wave amplitude a nonlinear Schrödinger (NLS) equation has been derived by using multiple scale perturbation technique. The nonthermal parameter, positron concentration, and ion temperature are shown to play significant role in the modulational instability of ion-acoustic waves and the formation of envelope solitons.