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Effect of driving frequency on dust particle dynamics in radiofrequency capacitive argon discharge

Published online by Cambridge University Press:  26 March 2021

Abdelhak Missaoui*
Affiliation:
Laboratory of Physics of Matter and Radiation, Faculty of Sciences, Mohammed I University, Oujda60040, Morocco
Morad El kaouini
Affiliation:
LMASI, Electromagnetism, Physics of Plasmas and Applications, Polydisciplinary Faculty of Nador, Selouane62700, Morocco
Hassan Chatei
Affiliation:
Laboratory of Physics of Matter and Radiation, Faculty of Sciences, Mohammed I University, Oujda60040, Morocco
*
Email address for correspondence: [email protected]

Abstract

This paper investigates the influence of the driving frequency on the dynamics of a single dust particle in argon radiofrequency discharge. A one-dimensional fluid model is presented and solved in the entire inter-electrode domain using the finite difference method. In order to solve the particle equation of motion, the coefficients describing the amplification and the damping of the dust particle oscillations are analytically calculated around the equilibrium position, these coefficients allow us to find the relation between the plasma and dust parameters. The results obtained cover the discharge characteristics, the charge and the dynamics of the dust particle. It has been found that the driving frequency has a significant effect on not only the discharge properties but also on the damped oscillatory motion and the equilibrium position of the dust particle. Hence, these oscillations become closer to the electrodes with increasing driving frequency whereas the dust equilibrium position becomes relatively farther from the powered electrode when the dust size decreases.

Type
Research Article
Copyright
Copyright © The Author(s), 2021. Published by Cambridge University Press

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