Potential around a charged dust particle in a collisional sheath

Potential around a charged dust particle in a collisional sheath

By employing a self-consistent kinetic approach, an analytical expression is derived for the potential of a test charge in a weakly ionized plasma with ion drift. The drift is assumed to be due to an external electric field, with the velocity being mobility-limited and much larger than the thermal v...

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Veröffentlicht in:Physics of plasmas 2007-05, Vol.14 (5), p.052108-052108-7
Hauptverfasser: Kompaneets, R., Konopka, U., Ivlev, A. V., Tsytovich, V., Morfill, G.
Format: Artikel
Sprache:eng
Schlagworte:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY
COLLISIONS
DUSTS
ELECTRIC FIELDS
HIGH-FREQUENCY DISCHARGES
ION DRIFT
MOBILITY
PLASMA
PLASMA SHEATH
POTENTIALS
VELOCITY
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Beschreibung
Zusammenfassung:By employing a self-consistent kinetic approach, an analytical expression is derived for the potential of a test charge in a weakly ionized plasma with ion drift. The drift is assumed to be due to an external electric field, with the velocity being mobility-limited and much larger than the thermal velocity of neutrals. The derived expression is proven to be in excellent agreement with the measurements by Konopka et al. [Phys. Rev. Lett. 84, 891 (2000)] performed in the sheath region of a rf discharge.
ISSN:1070-664X
1089-7674
DOI:10.1063/1.2730498