Computation of dust charge and potential on a static spherical dust grain immersed in rf discharges

Journal Article · Mon Dec 15 04:00:00 EST 2008 · Physics of Plasmas

DOI:https://doi.org/10.1063/1.3041659· OSTI ID:21259753

Ikkurthi, V R; Melzer, A ^[1]; Matyash, K; Schneider, R ^[2]

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1. Ernst-Moritz-Arndt Universitat Greifswald, 17489 Greifswald (Germany)
2. Max-Planck Institut fur Plasmaphysik, EURATOM Association, 17491 Greifswald (Germany)

Dust charge and potential on static spherical dust grains located in an argon rf discharge under typical laboratory experiment conditions have been computed using a three-dimensional particle-particle-particle-mesh code. Elastic and inelastic collisions have been included in the current model to obtain realistic rf discharge plasma conditions. Dust charge, potential, and potential distribution around the dust have been computed for various sizes of dust placed at different locations in the rf discharge. The dust charge is found to be smaller than the values from the simple orbit motion limited model due to ion-neutral collisions. Further, the dust potential has been found to be increasing with dust size. Moreover, the shielding length of the dust has been found between electron and ion Debye lengths.

• OSTI ID: 21259753
• Journal Information: Physics of Plasmas, Journal Name: Physics of Plasmas Journal Issue: 12 Vol. 15; ISSN PHPAEN; ISSN 1070-664X
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
ARGON
COLLISIONS
DEBYE LENGTH
DUSTS
ELECTRIC DISCHARGES
ELECTRONS
IONS
PLASMA
THREE-DIMENSIONAL CALCULATIONS