Tritium distributions on tungsten and carbon tiles used in the JET divertor

Y. Hatano, K. Yumizuru, J. Likonen, S. Koivuranta, J. Ikonen

    Research output: Contribution to journalArticleScientificpeer-review

    6 Citations (Scopus)

    Abstract

    Tritium distributions on the W-coated divertor tiles used with Be wall in JET 2011-2012 ITER-like wall (JET-ILW) campaign were measured using an imaging plate (IP) technique. The high intensity of photo-stimulated luminescence (PSL) from IP was observed at the regions covered by deposited Be layers. However, the PSL intensity was not simply proportional to the thickness of the deposited Be layers; the shadowed region of Tile 4 showed the highest PSL intensity though the thickness of deposited Be layer on this region was smaller than that on Tile 0 and the apron of Tile 1 by an order of magnitude. These observations indicated the influence of impurities such as oxygen on tritium retention in the deposited Be layers. The C tiles used in the 2007-2009 JET carbon wall (JET-C) campaign were also examined. The high PSL intensity was observed for the regions covered with deposited C layers in this case. The area of tile surfaces covered by the deposited tritium-rich layers on the W-coated-tiles used in the JET-ILW campaign was significantly smaller than that on the C tiles used in the JET-C campaign.
    Original languageEnglish
    Number of pages5
    JournalPhysica Scripta
    Volume2016
    Issue numberT167
    DOIs
    Publication statusPublished - 2016
    MoE publication typeA1 Journal article-refereed

    Fingerprint

    tiles
    Tile
    tritium
    Carbon
    tungsten
    carbon
    Luminescence
    luminescence
    Imaging
    Impurities
    Oxygen
    Directly proportional
    impurities
    oxygen

    Keywords

    • beryllium
    • fusion reactors
    • materials
    • plasma facing materials
    • tritium
    • tungsten

    Cite this

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    title = "Tritium distributions on tungsten and carbon tiles used in the JET divertor",
    abstract = "Tritium distributions on the W-coated divertor tiles used with Be wall in JET 2011-2012 ITER-like wall (JET-ILW) campaign were measured using an imaging plate (IP) technique. The high intensity of photo-stimulated luminescence (PSL) from IP was observed at the regions covered by deposited Be layers. However, the PSL intensity was not simply proportional to the thickness of the deposited Be layers; the shadowed region of Tile 4 showed the highest PSL intensity though the thickness of deposited Be layer on this region was smaller than that on Tile 0 and the apron of Tile 1 by an order of magnitude. These observations indicated the influence of impurities such as oxygen on tritium retention in the deposited Be layers. The C tiles used in the 2007-2009 JET carbon wall (JET-C) campaign were also examined. The high PSL intensity was observed for the regions covered with deposited C layers in this case. The area of tile surfaces covered by the deposited tritium-rich layers on the W-coated-tiles used in the JET-ILW campaign was significantly smaller than that on the C tiles used in the JET-C campaign.",
    keywords = "beryllium, fusion reactors, materials, plasma facing materials, tritium, tungsten",
    author = "Y. Hatano and K. Yumizuru and J. Likonen and S. Koivuranta and J. Ikonen",
    year = "2016",
    doi = "10.1088/0031-8949/T167/1/014009",
    language = "English",
    volume = "2016",
    journal = "Physica Scripta",
    issn = "0031-8949",
    publisher = "Institute of Physics IOP",
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    Tritium distributions on tungsten and carbon tiles used in the JET divertor. / Hatano, Y.; Yumizuru, K.; Likonen, J.; Koivuranta, S.; Ikonen, J.

    In: Physica Scripta, Vol. 2016, No. T167, 2016.

    Research output: Contribution to journalArticleScientificpeer-review

    TY - JOUR

    T1 - Tritium distributions on tungsten and carbon tiles used in the JET divertor

    AU - Hatano, Y.

    AU - Yumizuru, K.

    AU - Likonen, J.

    AU - Koivuranta, S.

    AU - Ikonen, J.

    PY - 2016

    Y1 - 2016

    N2 - Tritium distributions on the W-coated divertor tiles used with Be wall in JET 2011-2012 ITER-like wall (JET-ILW) campaign were measured using an imaging plate (IP) technique. The high intensity of photo-stimulated luminescence (PSL) from IP was observed at the regions covered by deposited Be layers. However, the PSL intensity was not simply proportional to the thickness of the deposited Be layers; the shadowed region of Tile 4 showed the highest PSL intensity though the thickness of deposited Be layer on this region was smaller than that on Tile 0 and the apron of Tile 1 by an order of magnitude. These observations indicated the influence of impurities such as oxygen on tritium retention in the deposited Be layers. The C tiles used in the 2007-2009 JET carbon wall (JET-C) campaign were also examined. The high PSL intensity was observed for the regions covered with deposited C layers in this case. The area of tile surfaces covered by the deposited tritium-rich layers on the W-coated-tiles used in the JET-ILW campaign was significantly smaller than that on the C tiles used in the JET-C campaign.

    AB - Tritium distributions on the W-coated divertor tiles used with Be wall in JET 2011-2012 ITER-like wall (JET-ILW) campaign were measured using an imaging plate (IP) technique. The high intensity of photo-stimulated luminescence (PSL) from IP was observed at the regions covered by deposited Be layers. However, the PSL intensity was not simply proportional to the thickness of the deposited Be layers; the shadowed region of Tile 4 showed the highest PSL intensity though the thickness of deposited Be layer on this region was smaller than that on Tile 0 and the apron of Tile 1 by an order of magnitude. These observations indicated the influence of impurities such as oxygen on tritium retention in the deposited Be layers. The C tiles used in the 2007-2009 JET carbon wall (JET-C) campaign were also examined. The high PSL intensity was observed for the regions covered with deposited C layers in this case. The area of tile surfaces covered by the deposited tritium-rich layers on the W-coated-tiles used in the JET-ILW campaign was significantly smaller than that on the C tiles used in the JET-C campaign.

    KW - beryllium

    KW - fusion reactors

    KW - materials

    KW - plasma facing materials

    KW - tritium

    KW - tungsten

    U2 - 10.1088/0031-8949/T167/1/014009

    DO - 10.1088/0031-8949/T167/1/014009

    M3 - Article

    VL - 2016

    JO - Physica Scripta

    JF - Physica Scripta

    SN - 0031-8949

    IS - T167

    ER -