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Title: Effects of dust contamination on the transverse dynamics of a magnetized electron plasma

Complex (dusty) plasmas are characterized by the presence of a fraction of micrometric or sub-micrometric particles which may collect a surface charge up to the order of a few thousand electron charges. The dusty plasmas studied in the experiments generally satisfy a global neutrality condition. By contrast, we present here the investigation of a magnetized nonneutral plasma, i.e., a plasma with a single sign of charge (e.g. electrons) confined in a Penning-Malmberg trap, contaminated by a dust population. We simulate the two-dimensional transverse dynamics of this multi-component plasma with a particle-in-cell code implementing a mass-less fluid (drift-Poisson) approximation for the electrons and a kinetic description for the dust component (including gravity). Simulations with different initial dust distributions and densities have been performed in order to investigate the influence of the dust on the development of the diocotron instability in the electron plasma. In particular, the early stage of the growth of the diocotron modes has been analyzed by Fourier decomposition.
Authors:
; ;  [1] ;  [2] ;  [1] ;  [3]
  1. INFN Sezione di Milano and Dipartimento di Fisica, Università degli Studi di Milano, Via Celoria 16, I-20133 Milano (Italy)
  2. INFN Laboratori Nazionali di Legnaro, Viale dell’Università 2, I-35020 Legnaro (Italy)
  3. (China)
Publication Date:
OSTI Identifier:
22490691
Resource Type:
Journal Article
Resource Relation:
Journal Name: AIP Conference Proceedings; Journal Volume: 1668; Journal Issue: 1; Conference: 11. international workshop on non-neutral plasmas, Takamatsu (Japan), 1-4 Dec 2014; 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; APPROXIMATIONS; COMPLEXES; COMPUTERIZED SIMULATION; DECOMPOSITION; DUSTS; ELECTRONS; FLUIDS; GRAVITATION; PLASMA; PLASMA INSTABILITY; PLASMA SIMULATION; SURFACES; TRAPS; TWO-DIMENSIONAL CALCULATIONS; TWO-DIMENSIONAL SYSTEMS