Dust charging processes with a Cairns-Tsallis distribution function with negative ions

Abid, A.A. and Khan, M.Z. and Yap, S.L. and Terças, H. and Mahmood, S. (2016) Dust charging processes with a Cairns-Tsallis distribution function with negative ions. Physics of Plasmas, 23 (1). 013706. ISSN 1070-664X

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Official URL: http://dx.doi.org/10.1063/1.4940329

Abstract

Dust grain charging processes are presented in a non-Maxwellian dusty plasma following the Cairns-Tsallis (q, α)-distribution, whose constituents are the electrons, as well as the positive/negative ions and negatively charged dust grains. For this purpose, we have solved the current balance equation for a negatively charged dust grain to achieve an equilibrium state value (viz., qd = constant) in the presence of Cairns-Tsallis (q, α)-distribution. In fact, the current balance equation becomes modified due to the Boltzmannian/streaming distributed negative ions. It is numerically found that the relevant plasma parameters, such as the spectral indexes q and α, the positive ion-to-electron temperature ratio, and the negative ion streaming speed (U0) significantly affect the dust grain surface potential. It is also shown that in the limit q → 1 the Cairns-Tsallis reduces to the Cairns distribution; for α = 0 the Cairns-Tsallis distribution reduces to pure Tsallis distribution and the latter reduces to Maxwellian distribution for q → 1 and α = 0.

Item Type: Article
Uncontrolled Keywords: Dust; Electron temperature; Ions; Negative ions; Positive ions; Surface potential
Subjects: Q Science > QC Physics
Divisions: Faculty of Science > Dept of Physics
Depositing User: Ms. Juhaida Abd Rahim
Date Deposited: 13 Oct 2017 03:07
Last Modified: 13 Oct 2017 03:07
URI: http://eprints.um.edu.my/id/eprint/18009

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