Microanalysis of deposited layers in the divertor of JET following operations with carbon wall

H. Bergsåker (Corresponding Author), P. Petersson, I. Bykov, G. Possnert, Jari Likonen, Seppo Koivuranta, Paul Coad, A.M. Widdowson, JET-EFDA contributors

    Research output: Contribution to journalArticleScientificpeer-review

    8 Citations (Scopus)


    Elemental mapping of cross sections of deposited layers on inboard tiles in the JET divertor after exposure to plasma operations with carbon wall are presented. The study was made using microbeam ion beam analysis methods in combination with optical microscopy and SEM. The surfaces had been exposed to plasma through different periods of operation (1998–2007, 2007–2009 and 1998–2009). The texture and composition of the layers are non-uniform. The physical structures include columnar, lamellar and disordered globular appearances. The distribution of trapped deuterium was frequently found to be lamellar, with well-defined sub layers with higher deuterium concentration. However, 3D regions with dimensions of about 100 μm with enhanced deuterium content were also found, both at the layer surfaces and in the layer cross sections. The distributions of beryllium and Inconel components were lamellar but did not otherwise show large non-uniformity on the same scale length as the deuterium.
    Original languageEnglish
    Pages (from-to)S668-S672
    JournalJournal of Nuclear Materials
    Issue numberSupplement
    Publication statusPublished - 2013
    MoE publication typeA1 Journal article-refereed
    Event20th International Conference on Plasma-Surface Interactions in Controlled Fusion Devices - Aachen, Aachen, Germany
    Duration: 21 May 201225 May 2012


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