Kinetic instability of twisted ion-acoustic mode with superthermal species of plasma

被引：4

作者：

Bukhari, S. ^{[1
]}

Raza, Syed RazaAli ^{[1
]}

Ali, S. ^{[1
,2
]}

机构：

[1] Univ Azad Jammu & Kashmir, Dept Phys, Muzaffarabad 13100, Azad Kashmir, Pakistan

[2] QAU Campus, Natl Ctr Phys, Shahdra Valley Rd, Islamabad 44000, Pakistan

来源：

CHINESE JOURNAL OF PHYSICS | 2021年 / 70卷

关键词：

twisted; instability; streaming electrons; paraxial approximation;

D O I：

10.1016/j.cjph.2020.12.023

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The electrostatic twisted ion-acoustic waves with finite orbital angular momentum states and associated kinetic instability are investigated in an electron-ion plasma. The plasma consisting of superthermal electrons and ions is modeled by using a non-gyrotropic Kappa distribution function in which the free energy source for wave excitation is provided by the relative directed motion of streaming electrons with respect to the ions. In the frame work of kinetic theory, the VlasovPoisson equations are employed to derive the expressions for dispersion relation and Landau damping rate under paraxial approximation. The results are analyzed for threshold condition of wave dispersion and instability growth rate in the presence of helical electric field structure. The relevance of study to the observed situations is also described.

引用

页码：196 / 202

页数：7

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