Ion acoustic double layers in the presence of positrons beam and q-nonextensive velocity distributed electrons

被引：0
作者：
S. Ali Shan
A. Mushtaq
N. Akhtar
机构：
[1] PINSTECH P.O. Nilore,Theoretical Plasma Physics Division
[2] Abdul Wali Khan University,Department of Physics
[3] National Centre for Physics,undefined
[4] Pakistan Institute of Engineering and Applied Science (PIEAS),undefined
来源：
Astrophysics and Space Science | 2013年 / 348卷
关键词：
Double layers; Streaming instability; Positron beam; Positron showers;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
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 vpo 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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页码：501 / 510
页数：9
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