Diffusion Dynamics of Charged Dust Particles in Capacitively Coupled RF Discharge System

Journal Article · Wed Mar 30 00:00:00 EDT 2011 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.3573712· OSTI ID:21511527

Chew, W X; Muniandy, S V; Wong, C S; Yap, S L; Tan, K S ^[1]

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1. Plasma Research Laboratory, Department of Physics, University of Malaya, 50603 Kuala Lumpur (Malaysia)

Dusty plasma is loosely defined as electron-ion plasma with additional charged components of micron-sized dust particles. In this study, we developed a particle diagnostic technique based on light scattering and particle tracking velocimetry to investigate the dynamics of micron-sized titanium oxide particles in Argon gas capacitively coupled rf-discharge. The particle trajectories are constructed from sequence of image frames and treated as sample paths of charged Brownian motion. At specific sets of plasma parameters, disordered liquid-like dust particle configuration are observed. Mean-square-displacement of the particle trajectories are determined to characterize the transport dynamics. We showed that the dust particles in disordered liquid phase exhibit anomalous diffusion with different scaling exponents for short and large time scales, indicating the presence of slow and fast modes which can be related to caging effect and dispersive transport, respectively.

• OSTI ID: 21511527
• Journal Information: AIP Conference Proceedings, Vol. 1328, Issue 1; Conference: PERFIK-2010: Malaysia annual physics conference 2010, Damai Laut (Malaysia), 27-30 Oct 2010; Other Information: DOI: 10.1063/1.3573712; (c) 2011 American Institute of Physics; ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
70 PLASMA PHYSICS AND FUSION TECHNOLOGY
ARGON
BROWNIAN MOVEMENT
CONFIGURATION
DIAGNOSTIC TECHNIQUES
DIFFUSION
DUSTS
ELECTRIC DISCHARGES
ELECTRONS
IONS
LIGHT SCATTERING
LIQUIDS
PARTICLES
PLASMA
RF SYSTEMS
SCALING
TITANIUM OXIDES
TRAJECTORIES
CHALCOGENIDES
CHARGED PARTICLES
ELEMENTARY PARTICLES
ELEMENTS
FERMIONS
FLUIDS
GASES
LEPTONS
NONMETALS
OXIDES
OXYGEN COMPOUNDS
RARE GASES
SCATTERING
TITANIUM COMPOUNDS
TRANSITION ELEMENT COMPOUNDS