skip to main content

Title: Fine structure of modal focusing effect in a three dimensional plasma-sheath-lens formed by disk electrodes

Modal and discrete focusing effects associated with three-dimensional plasma-sheath-lenses show promising potential for applications in ion beam extraction, mass spectrometry, plasma diagnostics and for basic studies of plasma sheath. The ion focusing properties can be adjusted by controlling the geometrical structure of the plasma-sheath-lens and plasma parameters. The positive and negative ion kinetics within the plasma-sheath-lens are investigated both experimentally and theoretically and a modal focusing ring is identified on the surface of disk electrodes. The focusing ring is very sensitive to the sheath thickness and can be used to monitor very small changes in plasma parameters. Three dimensional simulations are found to be in very good agreement with experiments.
Authors:
 [1] ;  [2] ;  [3] ;  [2]
  1. Department of Energy Conversion and Storage, Technical University of Denmark, Frederiksborgvej 399, Roskilde 4000 (Denmark)
  2. (Japan)
  3. Department of Electrical Engineering and Computer Science, Nagoya University, C3-1, Chikusa-ku, Nagoya 464-8603 (Japan)
Publication Date:
OSTI Identifier:
22489220
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; Journal Volume: 107; Journal Issue: 9; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; BEAM EXTRACTION; FINE STRUCTURE; FOCUSING; KINETICS; LENSES; MASS SPECTROSCOPY; PLASMA DIAGNOSTICS; PLASMA SHEATH; SIMULATION; SURFACES; THICKNESS