Unstable mode of ion-acoustic waves with two temperature q-nonextensive distributed electrons

doi:10.1088/1674-1056/abf641

中国物理B ›› 2021, Vol. 30 ›› Issue (9): 95202-095202.doi: 10.1088/1674-1056/abf641

Unstable mode of ion-acoustic waves with two temperature q-nonextensive distributed electrons

S Bukhari^1,†, Nadeem Hussain¹, and S Ali^1,2

1 Department of Physics, The University of Azad Jammu and Kashmir, Muzaffarabad 13100, Azad Kashmir, Pakistan;
2 National Center for Physics at QAU Campus, Shahdra Valley Road, Islamabad 44000, Pakistan

收稿日期:2020-10-23 修回日期:2021-03-23 接受日期:2021-04-09 出版日期:2021-08-19 发布日期:2021-09-16
通讯作者: S Bukhari E-mail:shujaht.physics@gmail.com

Unstable mode of ion-acoustic waves with two temperature q-nonextensive distributed electrons

S Bukhari^1,†, Nadeem Hussain¹, and S Ali^1,2

1 Department of Physics, The University of Azad Jammu and Kashmir, Muzaffarabad 13100, Azad Kashmir, Pakistan;
2 National Center for Physics at QAU Campus, Shahdra Valley Road, Islamabad 44000, Pakistan

Received:2020-10-23 Revised:2021-03-23 Accepted:2021-04-09 Online:2021-08-19 Published:2021-09-16
Contact: S Bukhari E-mail:shujaht.physics@gmail.com

摘要/Abstract

摘要： The linear characteristics of the unstable mode of ion-acoustic waves are examined in an electrostatic electron-ion plasma composed of streaming hot electrons, non-streaming cold electrons and dynamical positive ions. The plasma under consideration is modeled by using a non-gyrotropic nonextensive q-distribution function in which the free energy source for wave excitation is provided by the relative directed motion of streaming hot electrons with respect to the other plasma species. In the frame work of kinetic model, a linearized set of Vlasov-Poisson's equations are solved to obtain the analytical expressions for dispersion relation and Landau damping rate. The threshold condition for the unstable ion-acoustic wave is derived to assess the stability of the wave in the presence of nonextensive effects. Growth in the wave spectrum and nontrivial effects of q-nonextensive parameter on the ion-acoustic waves can be of interest for the readers in the regions of Saturns's magnetosphere.

关键词: non-gyrotropic, nonextensivity, Saturns's magnetosphere

Abstract: The linear characteristics of the unstable mode of ion-acoustic waves are examined in an electrostatic electron-ion plasma composed of streaming hot electrons, non-streaming cold electrons and dynamical positive ions. The plasma under consideration is modeled by using a non-gyrotropic nonextensive q-distribution function in which the free energy source for wave excitation is provided by the relative directed motion of streaming hot electrons with respect to the other plasma species. In the frame work of kinetic model, a linearized set of Vlasov-Poisson's equations are solved to obtain the analytical expressions for dispersion relation and Landau damping rate. The threshold condition for the unstable ion-acoustic wave is derived to assess the stability of the wave in the presence of nonextensive effects. Growth in the wave spectrum and nontrivial effects of q-nonextensive parameter on the ion-acoustic waves can be of interest for the readers in the regions of Saturns's magnetosphere.

Key words: non-gyrotropic, nonextensivity, Saturns's magnetosphere

中图分类号: (Waves, oscillations, and instabilities in plasmas and intense beams)

52.35.-g

S Bukhari, Nadeem Hussain, and S Ali. Unstable mode of ion-acoustic waves with two temperature q-nonextensive distributed electrons[J]. 中国物理B, 2021, 30(9): 95202-095202.

S Bukhari, Nadeem Hussain, and S Ali. Unstable mode of ion-acoustic waves with two temperature q-nonextensive distributed electrons[J]. Chin. Phys. B, 2021, 30(9): 95202-095202.

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Unstable mode of ion-acoustic waves with two temperature q-nonextensive distributed electrons

Unstable mode of ion-acoustic waves with two temperature q-nonextensive distributed electrons

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