Abstract
Linear and nonlinear studies are presented for an electron-ion plasma system which is being energized with an external beam of positrons. The electrons are assumed to follow the q-nonextensive velocity distribution. The growth rates of instability due to positron beam are analyzed numerically. The compressive and rarefactive double layers are studied in the system and it is found that by varying the entropic index parameter q, positron beam speed v po and concentration of positrons p, the dynamics of nonlinear profile is changing quite effectively. The relevance of the work regarding to astrophysical space plasma is pointed out.
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The author S.A.S. acknowledges the enabling role of the Higher Education Commission Islamabad, Pakistan and appreciates its financial support for Ph.D. Studies under Indigenous 5000 Fellowships Program.
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Ali Shan, S., Mushtaq, A. & Akhtar, N. Ion acoustic double layers in the presence of positrons beam and q-nonextensive velocity distributed electrons. Astrophys Space Sci 348, 501–510 (2013). https://doi.org/10.1007/s10509-013-1593-0
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DOI: https://doi.org/10.1007/s10509-013-1593-0