Abstract
Thick plate, unalloyed W was neutron irradiated in the High Flux Isotope Reactor (HFIR) at 550 °C to a fast fluence of 1.24 × 1025 n m-2 E > 0.1 MeV (∼0.24 dpa). Unirradiated and irradiated specimens of the material were high heat flux (HHF) tested in the Plasma Arc Lamp (PAL) facility. The PAL uses a high-power photon source to provide a broad and even heat distribution on the sample surface. To simulate on/off cycling of normal operating plasma, the samples were exposed to approximately 800 cycles at 4.73 MW m-2 absorbed heat flux (incident heat fluxes of 10.95 MW m-2). After PAL exposure, slight changes were observed on the surfaces of the samples with SEM. The samples showed some annealing in the near surface polished region, but they were all below the damage threshold for cracking or other destructive features. The PAL has a large parameter space for future testing. The use of the HFIR and PAL to sequentially expose neutron irradiated samples to HHF will be a powerful tool for understanding materials behavior in a fusion-like environment.
Original language | English |
---|---|
Article number | 014077 |
Journal | Physica Scripta |
Volume | 2020 |
Issue number | T171 |
DOIs | |
Publication status | Published - 2020 Jan 1 |
Event | 17th International Conference on Plasma-Facing Materials and Components for Fusion Applications, PFMC 2019 - Eindhoven, Netherlands Duration: 2019 May 20 → 2019 May 24 |
Keywords
- fusion materials
- high heat flux
- neutron irradiation
- plasma facing component
- tungsten
ASJC Scopus subject areas
- Atomic and Molecular Physics, and Optics
- Mathematical Physics
- Condensed Matter Physics