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Modulational 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

1. Department of Physics, Jadavpur University, Kolkata – 700032, India
2. Department of Electronics, Vidyasagar College, Kolkata – 700006, India
3. Department of Physics, Techno India University, Kolkata – 700091, India


Corresponding author :

Associate Professor. B. Ghosh,
Email:

Received: June 3, 2015,   Accepted: July 9, 2015,   Published:


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. DOI: 10.15297/JPCS.V3I2.04


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.


      
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      Journal of Physical and Chemical Sciences