Abstract
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.
| Original language | English |
|---|---|
| Pages (from-to) | 1624-1627 |
| Number of pages | 4 |
| Journal | Fusion Engineering and Design |
| Volume | 146 |
| DOIs | |
| State | Published - Sep 2019 |
Funding
This material is based upon work supported by the U.S. Department of Energy (DOE) Office of Science, Office of Fusion Energy Sciences, under the DOE Idaho Operations Office contract number DE-AC07-05ID14517 and under the UT-Battelle, LLC. contract DE-AC05-00OR22725. Sandia National Laboratories is a multi-mission laboratory managed and operated by National Technology and Engineering Solutions of Sandia, LLC, a wholly owned subsidiary of Honeywell International, Inc., for the U.S. Department of Energy’s National Nuclear Security Administration under contract DE-NA0003525. This material is based upon work supported by the U.S. Department of Energy (DOE) Office of Science, Office of Fusion Energy Sciences, under the DOE Idaho Operations Office contract number DE-AC07-05ID14517 and under the UT-Battelle, LLC. contract DE-AC05-00OR22725. Sandia National Laboratories is a multi-mission laboratory managed and operated by National Technology and Engineering Solutions of Sandia, LLC, a wholly owned subsidiary of Honeywell International, Inc. for the U.S. Department of Energy's National Nuclear Security Administration under contract DE-NA0003525. This work was supported by a Japan-US collaboration research program, PHENIX, and JSPS Kakenhi No.17K14901. A portion of this research used resources at the HFIR, a DOE Office of Science User Facility operated by the ORNL. This work was supported by a Japan-US collaboration research program, PHENIX, and JSPS Kakenhi No.17K14901. A portion of this research used resources at the HFIR, a DOE Office of Science User Facility operated by the ORNL.
| Funders | Funder number |
|---|---|
| DOE Office of Science | |
| U.S. Department of Energy | |
| Office of Science | |
| National Nuclear Security Administration | DE-NA0003525 |
| Fusion Energy Sciences | DE-AC05-00OR22725, DE-AC07-05ID14517 |
| Oak Ridge National Laboratory | |
| Sandia National Laboratories | |
| Japan Society for the Promotion of Science | 17K14901 |
Keywords
- Divertor
- Neutron
- TDS
- Tungsten
