Dust particle surface potential in an argon-helium plasma using the (r,q)-distribution function

Abstract

In this paper, the dust particle surface potential for argon-helium plasma is evaluated analytically and numerically in the contest of negatively charged dust particles by employing a power-law (r,q)-distribution function. Recent studies have reported the argon-helium plasma and conducted a brief theoretical and experimental survey. To deepen our understanding further, this study aims to analyze the argon-helium plasma comprehensively using the same pattern but with the (r,q)-distribution function. For this subject, the current balance equations are derived for electron, helium, and argon ions, when these charge species attain the quasineutrality condition. We numerically examined the currents of plasma species for a broad range of effective distribution function parameters r and q. It is revealed that the surface potential of dust particles is significantly affected by the parameters r and q, helium ion-to-electron temperature ratio, argon ion-to-electron temperature ratio, and helium ion to argon ion number density ratio. By incorporating the multi-ion (argon-helium) species, the significance of low-temperature non-Maxwellian dusty (complex) plasma is briefly examined.