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Title: Production of negative hydrogen ions on metal grids

Negative hydrogen ions are produced on a nickel grid with positive-ion irradiation. In order to investigate the production mechanism, a copper grid without the chemisorption of hydrogen atoms and positive helium ions without negative ionization are used for comparison. Positive hydrogen ions reflected on the metal surface obtain two electrons from the surface and become negatively ionized. It is found that the production yield of negative ions by desorption ionization of chemisorbed hydrogen atoms seems to be small, and the production is a minor mechanism.
Authors:
; ; ; ; ;  [1]
  1. Department of Electronic Device Engineering, Yamaguchi University, Ube 755-8611 (Japan)
Publication Date:
OSTI Identifier:
22408255
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physics of Plasmas; Journal Volume: 22; Journal Issue: 3; 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; ANIONS; CATIONS; CHEMISORPTION; COPPER; DESORPTION; ELECTRONS; GRIDS; HELIUM IONS; HYDROGEN; HYDROGEN IONS; IONIZATION; IRRADIATION; NICKEL; YIELDS