Ion-temperature-gradient driven modes in dust-contaminated plasma with nonthermal electron distribution and dust charge fluctuations

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• 作者：U. Zakir (1) (2)
  Q. Haque (3) (4)
  A. Qamar (1) (3)
  Arshad M. Mirza (5)
  
• 关键词：Ion temperature gradient ; Dust charge fluctuation ; Nonthermal electron distribution ; Dipolar vortices
• 刊名：Astrophysics and Space Science
• 出版年：2014
• 出版时间：April 2014
• 年：2014
• 卷：350
• 期：2
• 页码：565-572
• 全文大小：403 KB
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• 作者单位：U. Zakir (1) (2)
  Q. Haque (3) (4)
  A. Qamar (1) (3)
  Arshad M. Mirza (5)
  
  1. Institute of Physics and Electronics, University of Peshawar, Khyber Pakhtun Khwa, 25000, Pakistan
  2. Department of Physics, University of Malakand Chakdara Dir(L), Khyber Pakhtun Khwa, 18800, Pakistan
  3. National Center for Physics, Shahdrah Valley Road, Islamabad, 44000, Pakistan
  4. Theoretical Physics Division, PINSTECH, Islamabad, Pakistan
  5. Theoretical Plasma Physics Group, Physics Department, Quaid-e-Azam University, Islamabad, 45320, Pakistan
  
• ISSN：1572-946X

文摘

The effect of nonthermal electrons on ion-temperature-gradient (ITG) driven modes is investigated in the presence of variable dust charge and ion shear flow. The dust charge fluctuating expression is obtained in the presence of kappa distributed electrons. A dispersion relation is derived and analyzed numerically by choosing space plasma parameters of Jupiter/Saturn magnetospheres. It is found that the presence of nonthermal electrons population reduces the growth rate of ITG mode driven instability. The effects of ion temperature, electron density and magnetic field variation on the growth rate of ITG instability are presented numerically. It is also pointed out that the present results will be useful to understand the ITG driven modes with variable dust charge and kappa distributed electrons, present in most of the space plasma environments.