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Behavior of tungsten with exposure to deuterium plasmas |
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| Authors: | G.-N. Luo K. Umstadter W. Wampler |
| Affiliation: | a Institute of Plasma Physics, Chinese Academy of Sciences, P.O. Box 1126, Hefei 230031, China b Center for Energy Research, University of California, San Diego, La-Jolla, CA 92093-0417, USA c Tritium Technology Group, Japan Atomic Energy Agency, Tokai, Ibaraki 319-1195, Japan d Radiation Solid Interactions Department, Sandia National Laboratory, Albuquerque, NM 87185, USA e Department of Physics, Beijing University of Aeronautics and Astronautics, Beijing 100083, China |
| Abstract: | Four kinds of tungsten (W) materials, i.e. (1) foil of 50 μm thick (f-W), (2) polycrystalline (Pc-W) with grain size of ∼3 μm, (3) recrystallized (Re-W) with grain size of ∼50 μm and (4) vacuum plasma spraying (VPS-W) coatings, were irradiated employing linear plasma generators, with fluxes ?1 × 1022 D/m2/s and energies ?100 eV/D. Scanning electron microscopy (SEM) was used to observe blister formation at the surfaces. The SEM surface morphology and cross section observation indicates that blister formation is related to the microstructure and surface state of different material grades. Results of trapping and deuterium retention measured by thermal desorption spectroscopy (TDS) and nuclear reaction analysis (NRA) show also a close correlation between the retention and the microstructure and surface state. |
| Keywords: | 52.40.Hf 52.50.Dg 61.80.&minus x 68.37.Hk 68.43.Vx 81.05.Bx |
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