Deuterium retention in the divertor tiles of JET ITER-Like wall

A. Lahtinen (Corresponding Author), Jari Likonen, Seppo Koivuranta, Antti Hakola, A. Heinola, C.F. Ayres, A. Baron-Wiechec, J.P. Coad, A. Widdowson, J. Räisänen, JET Contributors

    Research output: Contribution to journalArticleScientificpeer-review

    15 Citations (Scopus)


    Divertor tiles removed after the second JET ITER-Like Wall campaign 2013-2014 (ILW-2) were studied using Secondary Ion Mass Spectrometry (SIMS). Measurements show that the thickest beryllium (Be) dominated deposition layers are located at the upper part of the inner divertor and are up to ~40µm thick at the lower part of Tile 0 exposed in 2011-2014. The highest deuterium (D) amounts (>8 · 1018 at./cm²), in contrast, were found on the upper part of Tile 1 (2013-2014), where the Be deposits are ~10µm thick. D was mainly retained in the near-surface layer of the Be deposits but also deeper in tungsten (W) and molybdenum (Mo) layers of the marker coated tiles, especially at W-Mo layer interfaces. D retention for the ILW-2 divertor tiles is higher than for the first campaign 2011-2012 (ILW-1) and probable reasons for the difference are that SIMS measurements for the ILW-2 samples were done deeper than for the ILW-1 samples, some of the tiles were exposed during both ILW-1 and ILW-2 and therefore had a longer exposure time, and the differences between ILW-1 and ILW-2 campaigns e.g. in strike point distributions and injected powers.
    Original languageEnglish
    Pages (from-to)655-661
    JournalNuclear Materials and Energy
    Publication statusPublished - 1 Aug 2017
    MoE publication typeA1 Journal article-refereed
    Event22nd International Conference on Plasma-Surface Interactions in Controlled Fusion Devices (PSI-22) - Rome, Italy
    Duration: 30 May 20163 Jun 2016


    This work has been carried out within the framework of the EUROfusion Consortium and has received funding from the Euratom research and training program 2014–2018 under grant agreement No 633053. The views and opinions expressed herein do not necessarily reflect those of the European Commission.


    • JET
    • fuel retention
    • erosion
    • deposition
    • Fuel retention
    • Deposition
    • Erosion


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