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Effect of nonthermal electrons and positrons on ion-acoustic solitary waves in a plasma with warm drifting ions

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Abstract

Using Sagdeev potential technique, ion-acoustic solitary waves have been theoretically studied in collisionless unmagnetized plasma consisting of nonthermal electrons, nonthermal positrons and warm drifting positive ions. Ion-acoustic solitary wave solutions have been obtained and its profiles have been numerically analyzed with respect to plasma parameters. The nonthermal parameters and temperatures are shown to play significant role on the formation and nature of solitary waves. It is shown that the nature, amplitude and width of lower- and higher-order solitons depend sensitively on these plasma parameters. The dependence of Sagdeev potential profile on different plasma parameters has also been examined. We have found that stronger nonthermality leads to shorter and wider solitons.

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Authors and Affiliations

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

    B. Ghosh

  2. Department of Electronics, Vidyasagar College, Kolkata, India

    S. Banerjee

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  1. B. Ghosh
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  2. S. Banerjee
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Correspondence to B. Ghosh.

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Ghosh, B., Banerjee, S. Effect of nonthermal electrons and positrons on ion-acoustic solitary waves in a plasma with warm drifting ions. Indian J Phys 89, 1307–1312 (2015). https://doi.org/10.1007/s12648-015-0706-8

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  • DOI: https://doi.org/10.1007/s12648-015-0706-8

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