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| 001 | 1005321 | ||
| 005 | 20240711113956.0 | ||
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| 037 | _ | _ | |a FZJ-2023-01430 |
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| 100 | 1 | _ | |a Gago, Mauricio |0 P:(DE-Juel1)172933 |b 0 |e Corresponding author |
| 245 | _ | _ | |a Bubble Formation in ITER-Grade Tungsten after Exposure to Stationary D/He Plasma and ELM-like Thermal Shocks |
| 260 | _ | _ | |a Basel |c 2023 |b MDPI |
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| 520 | _ | _ | |a Plasma-facing materials (PFMs) in the ITER divertor will be exposed to severe conditions, including exposure to transient heat loads from edge-localized modes (ELMs) and to plasma particles and neutrons. Tungsten is the material chosen as PFM for the ITER divertor. In previous tests, bubble formation in ITER-grade tungsten was detected when exposed to fusion relevant conditions. For this study, ITER-grade tungsten was exposed to simultaneous ELM-like transient heat loads and D/He (6%) plasma in the linear plasma device PSI-2. Bubble formation was then investigated via SEM micrographs and FIB cuts. It was found that for exposure to 100.000 laser pulses of 0.6 GWm−2 absorbed power density (Pabs), only small bubbles in the nanometer range were formed close to the surface. After increasing Pabs to 0.8 and 1.0 GWm−2, the size of the bubbles went up to about 1 µm in size and were deeper below the surface. Increasing the plasma fluence had an even larger effect, more than doubling bubble density and increasing bubble size to up to 2 µm in diameter. When using deuterium-only plasma, the samples showed no bubble formation and reduced cracking, showing such bubble formation is caused by exposure to helium plasma. |
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| 700 | 1 | _ | |a Unterberg, Bernhard |0 P:(DE-Juel1)6784 |b 2 |u fzj |
| 700 | 1 | _ | |a Wirtz, Marius |0 P:(DE-Juel1)129811 |b 3 |
| 773 | _ | _ | |a 10.3390/jne4010016 |g Vol. 4, no. 1, p. 204 - 212 |0 PERI:(DE-600)3040700-X |n 1 |p 204 - 212 |t Journal of nuclear engineering |v 4 |y 2023 |x 2673-4362 |
| 856 | 4 | _ | |u https://juser.fz-juelich.de/record/1005321/files/Postprint_Gago%20Bubble%20Formation%20in%20ITER.pdf |y OpenAccess |
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