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Title: Quasi-discrete particle motion in an externally imposed, ordered structure in a dusty plasma at high magnetic field

Dusty plasmas have been studied in argon, radio frequency (rf) glow discharge plasmas at magnetic fields up to 2.5 T where the electrons and ions are strongly magnetized. Plasmas are generated between two parallel plate electrodes where the lower, powered electrode is solid and the upper electrode supports a dual mesh consisting of #24 brass and #30 aluminum wire cloth. In this experiment, we study the formation of imposed ordered structures and particle dynamics as a function of magnetic field. Through observations of trapped particles and the quasi-discrete (i.e., “hopping”) motion of particles between the trapping locations, it is possible to make a preliminary estimate of the potential structure that confines the particles to a grid structure in the plasma. This information is used to gain insight into the formation of the imposed grid pattern of the dust particles in the plasma.
Authors:
; ; ; ;  [1] ;  [2] ;  [3]
  1. Physics Department, Auburn University, Auburn, Alabama 36849 (United States)
  2. Department of Physics and Astronomy, The University of Iowa, Iowa City, Iowa 52242 (United States)
  3. Department of Electrical and Computer Engineering, University of California, San Diego, La Jolla, California 92093 (United States)
Publication Date:
OSTI Identifier:
22489893
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physics of Plasmas; Journal Volume: 22; Journal Issue: 11; 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; ALUMINIUM; ARGON; BRASS; ELECTRODES; ELECTRONS; GLOW DISCHARGES; IONS; MAGNETIC FIELDS; MAGNETIZATION; PLASMA; PLATES; RADIOWAVE RADIATION; TRAPPING; WIRES