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Surface composition and structure of divertor tiles following the JET tokamak operation with the ITER-like wall
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2017 (English)In: Nuclear Fusion, ISSN 0029-5515, E-ISSN 1741-4326, Vol. 57, no 7, 076027Article in journal (Refereed) Published
Abstract [en]

Samples extracted from several divertor tiles following the 2011-2012 operation of JET with the ITER-Like wall were analyzed using ion beam analysis methods, x-ray fluorescence spectroscopy, scanning electron microscopy with energy dispersive spectroscopy analysis and x-ray diffraction. The emphasis was on the determination of light species and on material mixing including compound formation on the bottom and the outer divertor tiles. Deposition of deuterium, beryllium, carbon, nitrogen, oxygen, iron, chromium, nickel and molybdenum has been detected on all studied tiles. The thickest deposition, of around 4 μm, was measured on the bottom of the outer divertor, whereas the other surfaces (inner bottom and vertical outer) the co-deposits were around 1 μm. x-ray diffraction measurements have revealed the formation of the compound W2C on all specimens.

Place, publisher, year, edition, pages
Institute of Physics Publishing (IOPP), 2017. Vol. 57, no 7, 076027
Keyword [en]
Divertor, Electron microscopy, Ion beam analysis, JET tokamak, Tungsten
National Category
Physical Sciences
Identifiers
URN: urn:nbn:se:kth:diva-210608DOI: 10.1088/1741-4326/aa6ec1ISI: 000402878400002Scopus ID: 2-s2.0-85020924246OAI: oai:DiVA.org:kth-210608DiVA: diva2:1118936
Note

QC 20170703

Available from: 2017-07-03 Created: 2017-07-03 Last updated: 2017-07-03Bibliographically approved

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