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Title: Dust charging and charge fluctuations in a weakly collisional radio-frequency sheath at low pressure

Models for the charging of dust particles in the bulk plasma and in the sheath region are discussed. A new model is proposed that describes collision-enhanced ion currents in the sheath. The collisions result in a substantial reduction of the negative charge of the dust. Experimental data for the dust charge in the sheath can be described by this model when a Bi-Maxwellian electron distribution is taken into account. Expressions for the dust charging rate for all considered models are presented and their influence on the rise of the kinetic dust temperature is discussed.
Authors:
;  [1]
  1. IEAP, Christian-Albrechts-Universit├Ąt, Kiel (Germany)
Publication Date:
OSTI Identifier:
22410359
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physics of Plasmas; Journal Volume: 22; Journal Issue: 5; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; BOLTZMANN STATISTICS; COLLISIONAL PLASMA; COLLISIONS; CURRENTS; DUSTS; ELECTRONS; EXPERIMENTAL DATA; IONS; PLASMA SHEATH; PRESSURE RANGE KILO PA; RADIOWAVE RADIATION