This title appears in the Scientific Report :
2015
Please use the identifier:
http://dx.doi.org/10.1016/j.fusengdes.2015.06.051 in citations.
Synergistic Effects of ELMs and Steady State H and H/He Irradiation on Tungsten
Synergistic Effects of ELMs and Steady State H and H/He Irradiation on Tungsten
To investigate synergistic effects of high heat flux loading on H and H/He loaded tungsten surfaces, specimens were exposed to a 30 keV steady-state H or H/He beam and subsequently loaded with an electron beam to simulate ELMs. The heat flux during the H and H/He loading was 10.5 MW m−2, while a 2 ×...
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Personal Name(s): | Lemahieu, Nathan (Corresponding author) |
---|---|
Greuner, Henri / Linke, Jochen / Maier, Hans / Pintsuk, Gerald / Van Oost, Guido / Wirtz, Marius | |
Contributing Institute: |
Werkstoffstruktur und -eigenschaften; IEK-2 Plasmaphysik; IEK-4 |
Published in: | Fusion engineering and design, 98-99 (2015) S. 2020 - 2024 |
Imprint: |
New York, NY [u.a.]
Elsevier
2015
|
DOI: |
10.1016/j.fusengdes.2015.06.051 |
Document Type: |
Journal Article |
Research Program: |
Helmholtz Interdisciplinary Doctoral Training in Energy and Climate Research (HITEC) Plasma-Wall-Interaction |
Publikationsportal JuSER |
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520 | |a To investigate synergistic effects of high heat flux loading on H and H/He loaded tungsten surfaces, specimens were exposed to a 30 keV steady-state H or H/He beam and subsequently loaded with an electron beam to simulate ELMs. The heat flux during the H and H/He loading was 10.5 MW m−2, while a 2 × 1025 m−2 fluence was reached. After exposure, all specimens exhibited an altered surface morphology. The H/He samples with a surface temperature of 1000 °C and 1500 °C had a multitude of surface extrusions. Afterwards the particle loaded samples were exposed to 100 ELM-like pulses around the material's damage threshold. Transient heat fluxes of 190 MW m−2 and 380 MW m−2 were applied at room temperature and 400 °C for a duration of 1 ms. Post-mortem analysis showed no deterioration of thermal shock resistance in comparison with polished material. For some tests the reference specimens roughened or cracked while the H or H/He exposed material had no damage. The H-content and the H/He-induced cavities and/or extrusions are suggested as two potential causes for this change in material behaviour. | ||
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