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Dust acoustic and drift waves in a non-Maxwellian dusty plasma with dust charge fluctuation

Published online by Cambridge University Press:  21 September 2015

U. Zakir ,
Q. Haque ,
N. Imtiaz  and
A. Qamar
U. Zakir*
Affiliation:
Department of Physics, University of Peshawar, Khyber Pakhtun Khwa 25000, Pakistan Department of Physics, University of Malakand Chakdara Dir(L), Khyber Pakhtun Khwa 18800, Pakistan
Q. Haque
Affiliation:
Theoretical Physics Division, PINSTECH, Islamabad, Pakistan National Center for Physics, Shahdrah Valley Road, Islamabad 44000, Pakistan
N. Imtiaz
Affiliation:
Theoretical Physics Division, PINSTECH, Islamabad, Pakistan
A. Qamar
Affiliation:
Department of Physics, University of Peshawar, Khyber Pakhtun Khwa 25000, Pakistan National Center for Physics, Shahdrah Valley Road, Islamabad 44000, Pakistan
*
†Email address for correspondence: riizts@yahoo.com
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Abstract

The properties of dust acoustic and drift waves are investigated in a charge varying magnetized dusty plasma. The plasma is composed of non-thermal electrons and ions with dynamic dust particles. The mathematical expression which describes the dust charge fluctuation is obtained using ${\it\kappa}$-distribution for both the electrons and ions. A dispersion relation is derived and analysed numerically by choosing space plasma parameters. It is found that the inclusion of variable dust charge along with the non-thermal effects of electrons and ions significantly affect linear/nonlinear properties of the dust acoustic and dust drift waves. The effects of different physical parameters including spectral index (${\it\kappa}$), dust charge number ($Z_{d}$), electron density ($n_{e}$) and ion temperature ($T_{i}$) on the wave dispersion and instability are presented. It is found that the presence of the non-thermal electron and ion populations reduce the growth rate of the instability which arises due to the dust charging effect. In addition, the nonlinear vortex solutions are also obtained. For illustration, the results are analysed by using the dusty plasma parameters of Saturn’s magnetosphere.

Type
Research Article
Information
Journal of Plasma Physics , Volume 81 , Issue 6 , December 2015 , 905810601
Copyright
© Cambridge University Press 2015 

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