Title | Scanning electron microscopy analyses of an ITER plasma-facing unit mockup exposed to extreme ion fluences in Magnum-PSI |
Publication Type | Journal Article |
Year of Publication | 2020 |
Authors | M. Balden, S. Elgeti, T.W Morgan, S. Brezinsek, G. De Temmerman |
Journal | Physica Scripta |
Volume | 95 |
Issue | T171 |
Pagination | 014026 |
Date Published | 03/2020 |
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. |
DOI | 10.1088/1402-4896/ab4479 |
Division | PSI |
Department | PMI |
PID | 9c76acfe55a642c8413ebaee378021f4 |
Alternate Title | Phys. Scr. |
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