Computation of ion drag force on a static spherical dust grain immersed in rf discharges

Journal Article · Wed Apr 15 04:00:00 EDT 2009 · Physics of Plasmas

DOI:https://doi.org/10.1063/1.3115401· OSTI ID:21277044

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

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1. Ernst-Moritz-Arndt Universitaet Greifswald, Felix-Hausdorff-str. 6, 17489 Greifswald (Germany)
2. Max-Planck Institut fur Plasmaphysik, EURATOM Association, 17491 Greifswald (Germany)

The ion drag force on static spherical dust grains located in an argon rf discharge under typical laboratory experiment conditions has 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. The ion drag has been computed for various sizes of dust placed at different locations in the rf discharge under different gas pressures. The orbital drag force is typically found larger than the collection drag force. Ion-neutral collisions increase flux to the dust and hence the total drag force for collisional case is found larger than the collisionless case. Within the pressure range investigated, the drag forces do not vary much with pressure. The size dependence of the drag force is nonlinear and agrees well with the forces computed from the analytical models.

• OSTI ID: 21277044
• Journal Information: Physics of Plasmas, Journal Name: Physics of Plasmas Journal Issue: 4 Vol. 16; ISSN PHPAEN; ISSN 1070-664X
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
ARGON
COLLISIONS
DRAG
DUSTS
HIGH-FREQUENCY DISCHARGES
IONS
NONLINEAR PROBLEMS
PLASMA SIMULATION
THREE-DIMENSIONAL CALCULATIONS