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Title: Stability and size of particle pairs in complex plasmas

Particle pairing in a complex plasma was experimentally studied with the emphasis on pair spatial extent and stability. Micron-size particles were suspended in the (pre)sheath area above the lower electrode in a capacitively coupled radio-frequency discharge in argon. They formed vertical pairs due to the ion wakes created by the flow of ions past particles. We discuss the confinement mechanism for the lower particle, resulting from a combination of the wake field and the field of non-uniform sheath. A model of particle pairs is proposed, which provides good description for the dependence of pair size and stability on experimental parameters.
Authors:
 [1] ;  [2] ; ;  [3] ;  [3] ;  [4]
  1. Deutsches Zentrum für Luft- und Raumfahrt, Forschungsgruppe Komplexe Plasmen, D-82234 Weßling (Germany)
  2. (Germany)
  3. Max-Planck-Institut für extraterrestrische Physik, D-85741 Garching (Germany)
  4. (Russian Federation)
Publication Date:
OSTI Identifier:
22403301
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physics of Plasmas; Journal Volume: 21; Journal Issue: 11; Other Information: (c) 2014 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; ARGON; PARTICLES; PLASMA; RADIOWAVE RADIATION; STABILITY