Influence of dynamic annealing of irradiation defects on the deuterium retention behaviors in tungsten irradiated with neutron
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- National Inst. for Fusion Science, National Inst. of Natural Sciences (Japan)
- Idaho National Lab. (INL), Idaho Falls, ID (United States)
- Sandia National Lab. (SNL-CA), Livermore, CA (United States)
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
- Hokkaido Univ., Sapporo (Japan)
- Univ. of Toyama, Toyama (Japan). Hydrogen Isotope Research Center
- Shizuoka Univ., Shizuoka (Japan)
Tungsten (W) samples were damaged by neutron and 6.4 MeV Fe-ion irradiation above 1000 K simulating the divertor operation temperature. Deuterium (D) retention properties were examined by decorating the damaged W with D and subsequent thermal desorption spectroscopy (TDS) measurements. Vacancy clusters were the major D trapping site in the W irradiated with Fe-ion at 873 K, although D retention by vacancy clusters decreased in the W irradiated with Fe-ion at 1173 K due to dynamic annealing. The D de-trapping activation energy from vacancy clusters was found to be 1.85 eV. D retention in neutron damage W was larger than that damaged by Fe-ion due to the uniform distribution of irradiation defects. The D desorption behaviors from neutron damaged W was simulated well by assuming the D de-trapping activation energy to be 1.52 eV.
- Research Organization:
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC)
- Grant/Contract Number:
- AC05-00OR22725
- OSTI ID:
- 1564143
- Journal Information:
- Fusion Engineering and Design, Vol. 146, Issue PB; ISSN 0920-3796
- Publisher:
- ElsevierCopyright Statement
- Country of Publication:
- United States
- Language:
- English
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