Scanning electron microscopy analyses of an ITER plasma-facing unit mockup exposed to extreme ion fluences in Magnum-PSI
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Author | |
Abstract |
A small-scale tungsten monoblock mockup was exposed to continuous Magnum-PSI plasma beams under six different conditions, including pure hydrogen, deuterium and helium (He) plasmas as well as mixed D/He plasmas with low electron temperature (1.5–5 eV), with maximum surface temperatures up to 1600 °C, and with ion fluences up to 10 30 m−2. The recrystallization in the centre of the hottest exposure spots, the absence of cracking on all monoblocks, the formation of a nanostructured fuzz layer several microns thick by pure He exposure, and the presence of various impurities from the exposure in Magnum-PSI on the surface were observed and analysed with a dedicated scanning electron microscope able to handle the entire mockup without any prior cutting. |
Year of Publication |
2020
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Journal |
Physica Scripta
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Volume |
95
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Issue |
T171
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Number of Pages |
014026
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Date Published |
03/2020
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DOI | |
PId |
9c76acfe55a642c8413ebaee378021f4
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Alternate Journal |
Phys. Scr.
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Journal Article
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