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Modulational Instability of Ion-Acoustic Waves in a Plasma with Warm Ions, Nonthermal Electrons and Nonthermal Positrons

HomeModulational Instability of Ion-Acoustic Waves in a Plasma with Warm Ions, Nonthermal Electrons and Nonthermal Positrons

Research Article

Modulational Instability of Ion-Acoustic Waves in a Plasma with Warm Ions, Nonthermal Electrons and Nonthermal Positrons

B Ghosh, S Banerjee and S Chandra

Corresponding Author : B. Ghosh,

Department of Physics, Jadavpur University, Kolkata,700032, India.

Email ID : bsdvghosh@gmail.com

Received : 2015-06-03 Accepted : 2015-07-09 Published : 2015-07-09

Abstract : The modulational instability and envelope solitons of ion-acoustic waves have been investigated in an unmagnetized collisionless warm electron–positron–ion (e-p-i) plasma with both the electrons and positrons having nonthermal distribution. Using standard multiple scale perturbation technique a nonlinear Schrödinger equation (NLSE) governing nonlinear evolution of the wave envelope has been derived. Using this equation we have shown through numerical analysis that the presence of nonthermal electrons and positrons plays significant role on the formation and the structure of ion-acoustic envelope solitons.

Keywords : Nonthermal electrons, Nonthermal positrons, Nonlinear Schrödinger equation,

Citation : B Ghosh et al.. (2015) Modulational Instability of Ion-Acoustic Waves in a Plasma with Warm Ions, Nonthermal Electrons and Nonthermal Positrons. j. of Physical and Chemical Sciences.V3I2. 04. DOI : 10.5281/zenodo.1000320

Copyright : © 2015 B Ghosh. Patel. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

Journal of Physical and Chemical Sciences

ISSN : 2348-327X

Volume 3 / Issue 2

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