Stochastic Dynamics of Charge Fluctuations in Dusty Plasma

Journal Article · Tue Nov 29 04:00:00 EST 2011 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.3659811· OSTI ID:21612219

Asgari, H; Muniandy, S V; Wong, C S ^[1]

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

Dust particles immersed in plasma acquire charge by collecting electrons and ions and also by emitting electrons. The grain charge fluctuates due to the discrete nature of the charge. The rates of ions and electrons capturing depend on the grain charge and therefore on the history of the absorption. Memory effects can be introduced into stochastic charging dynamics by generalizing the standard Langevin equation to fractional Langevin equation with shifted fractional derivative. The temporal autocorrelation function of grain charge fluctuation is derived and average amplitude of fluctuations is determined.

• OSTI ID: 21612219
• Journal Information: AIP Conference Proceedings, Journal Name: AIP Conference Proceedings Journal Issue: 1 Vol. 1397; ISSN APCPCS; ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
ABSORPTION
AMPLITUDES
CAPTURE
CHARGED PARTICLES
DUSTS
ELECTRIC CHARGES
ELECTRON CAPTURE
ELECTRONS
ELEMENTARY PARTICLES
EQUATIONS
FERMIONS
FLUCTUATIONS
IONS
LANGEVIN EQUATION
LEPTONS
PARTICLES
PLASMA
SORPTION
STOCHASTIC PROCESSES
VARIATIONS