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Title: Isotope effects on desorption kinetics of hydrogen isotopes implanted into stainless steel by glow discharge

In a fusion device the control of fuel particles implies to know the desorption rate of hydrogen isotopes by the plasma-facing materials. In this paper desorption kinetics of hydrogen isotopes implanted into type 316L stainless steel by glow discharge have been studied by experiment and numerical calculation. The temperature of a maximum desorption rate depends on glow discharge time and heating rate. Desorption spectra observed under various experimental conditions have been successfully reproduced by numerical simulations that are based on a diffusion-limited process. It is suggested, therefore, that desorption rate of a hydrogen isotope implanted into the stainless steel is limited by a diffusion process of hydrogen isotope atoms in bulk. Furthermore, small isotope effects were observed for the diffusion process of hydrogen isotope atoms. (authors)
Authors:
; ;  [1] ; ;  [2]
  1. Hydrogen Isotope Research Center, University of Toyama, Gofuku, Toyama (Japan)
  2. National Institute for Fusion Science, Toki-shi, Gifu (Japan)
Publication Date:
OSTI Identifier:
22429744
Resource Type:
Journal Article
Resource Relation:
Journal Name: Fusion Science and Technology; Journal Volume: 67; Journal Issue: 3; Conference: TRITIUM 2013: 10. International Conference on Tritium Science and Technology, Nice Acropolis (France), 21-25 Oct 2013; Other Information: Country of input: France; 3 refs.
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; COMPUTERIZED SIMULATION; DESORPTION; DIFFUSION; FIRST WALL; FUEL PARTICLES; GLOW DISCHARGES; HEATING RATE; HYDROGEN ISOTOPES; ISOTOPE EFFECTS; KINETICS; STAINLESS STEEL-316L; THERMONUCLEAR DEVICES