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

JET-EFDA collaborators

    Research output: Contribution to journalArticleScientificpeer-review

    8 Citations (Scopus)

    Abstract

    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
    Number of pages5
    JournalJournal of Nuclear Materials
    Volume438
    Issue numberSupplement
    DOIs
    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

    Fingerprint

    Deuterium
    Microanalysis
    microanalysis
    deuterium
    Carbon
    carbon
    Beryllium
    Plasmas
    Inconel (trademark)
    microbeams
    tiles
    cross sections
    Tile
    beryllium
    nonuniformity
    Ion beams
    Optical microscopy
    surface layers
    textures
    Textures

    Cite this

    @article{06bf9fff003541a4b50f2c4d001c3545,
    title = "Microanalysis of deposited layers in the divertor of JET following operations with carbon wall",
    abstract = "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.",
    author = "H. Bergs{\aa}ker and P. Petersson and I. Bykov and G. Possnert and Jari Likonen and Seppo Koivuranta and Paul Coad and A.M. Widdowson and {JET-EFDA collaborators}",
    year = "2013",
    doi = "10.1016/j.jnucmat.2013.01.141",
    language = "English",
    volume = "438",
    pages = "S668--S672",
    journal = "Journal of Nuclear Materials",
    issn = "0022-3115",
    publisher = "Elsevier",
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    }

    Microanalysis of deposited layers in the divertor of JET following operations with carbon wall. / JET-EFDA collaborators.

    In: Journal of Nuclear Materials, Vol. 438, No. Supplement, 2013, p. S668-S672.

    Research output: Contribution to journalArticleScientificpeer-review

    TY - JOUR

    T1 - Microanalysis of deposited layers in the divertor of JET following operations with carbon wall

    AU - Bergsåker, H.

    AU - Petersson, P.

    AU - Bykov, I.

    AU - Possnert, G.

    AU - Likonen, Jari

    AU - Koivuranta, Seppo

    AU - Coad, Paul

    AU - Widdowson, A.M.

    AU - JET-EFDA collaborators

    PY - 2013

    Y1 - 2013

    N2 - 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.

    AB - 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.

    U2 - 10.1016/j.jnucmat.2013.01.141

    DO - 10.1016/j.jnucmat.2013.01.141

    M3 - Article

    VL - 438

    SP - S668-S672

    JO - Journal of Nuclear Materials

    JF - Journal of Nuclear Materials

    SN - 0022-3115

    IS - Supplement

    ER -