Tritium analysis of divertor tiles used in JET ITER-like wall campaigns by means of ß-ray induced x-ray spectrometry

Y. Hatano, K. Yumizuru, S. Koivuranta, J. Likonen, M. Hara, M. Matsuyama, S. Masuzaki, M. Tokitani, N. Asakura, K. Isobe, T. Hayashi, A. Baron-Wiechec, A. Widdowson, JET contributors

    Research output: Contribution to journalArticleScientificpeer-review

    3 Citations (Scopus)

    Abstract

    Energy spectra of β-ray induced x-rays from divertor tiles used in ITER-like wall campaigns of the Joint European Torus were measured to examine tritium (T) penetration into tungsten (W) layers. The penetration depth of T evaluated from the intensity ratio of W(Lα) x-rays to W(Mα) x-rays showed clear correlation with poloidal position; the penetration depth at the upper divertor region reached several micrometers, while that at the lower divertor region was less than 500 nm. The deep penetration at the upper part was ascribed to the implantation of high energy T produced by DD fusion reactions. The poloidal distribution of total x-ray intensity indicated higher T retention in the inboard side than the outboard side of the divertor region.

    Original languageEnglish
    Article number014014
    JournalPhysica Scripta
    Issue numberT170
    DOIs
    Publication statusPublished - 1 Dec 2017
    MoE publication typeA1 Journal article-refereed

    Fingerprint

    tiles
    Tile
    tritium
    Penetration
    Half line
    rays
    penetration
    spectroscopy
    x rays
    Joint European Torus
    Implantation
    Energy Spectrum
    High Energy
    micrometers
    implantation
    Torus
    Fusion
    tungsten
    energy spectra
    fusion

    Keywords

    • nuclear fusion
    • tritium
    • divertor
    • retention
    • tungsten
    • implantation
    • Joint European Torus

    Cite this

    Hatano, Y. ; Yumizuru, K. ; Koivuranta, S. ; Likonen, J. ; Hara, M. ; Matsuyama, M. ; Masuzaki, S. ; Tokitani, M. ; Asakura, N. ; Isobe, K. ; Hayashi, T. ; Baron-Wiechec, A. ; Widdowson, A. ; contributors, JET. / Tritium analysis of divertor tiles used in JET ITER-like wall campaigns by means of ß-ray induced x-ray spectrometry. In: Physica Scripta. 2017 ; No. T170.
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    title = "Tritium analysis of divertor tiles used in JET ITER-like wall campaigns by means of {\ss}-ray induced x-ray spectrometry",
    abstract = "Energy spectra of β-ray induced x-rays from divertor tiles used in ITER-like wall campaigns of the Joint European Torus were measured to examine tritium (T) penetration into tungsten (W) layers. The penetration depth of T evaluated from the intensity ratio of W(Lα) x-rays to W(Mα) x-rays showed clear correlation with poloidal position; the penetration depth at the upper divertor region reached several micrometers, while that at the lower divertor region was less than 500 nm. The deep penetration at the upper part was ascribed to the implantation of high energy T produced by DD fusion reactions. The poloidal distribution of total x-ray intensity indicated higher T retention in the inboard side than the outboard side of the divertor region.",
    keywords = "nuclear fusion, tritium, divertor, retention, tungsten, implantation, Joint European Torus",
    author = "Y. Hatano and K. Yumizuru and S. Koivuranta and J. Likonen and M. Hara and M. Matsuyama and S. Masuzaki and M. Tokitani and N. Asakura and K. Isobe and T. Hayashi and A. Baron-Wiechec and A. Widdowson and JET contributors",
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    month = "12",
    day = "1",
    doi = "10.1088/1402-4896/aa8931",
    language = "English",
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    Hatano, Y, Yumizuru, K, Koivuranta, S, Likonen, J, Hara, M, Matsuyama, M, Masuzaki, S, Tokitani, M, Asakura, N, Isobe, K, Hayashi, T, Baron-Wiechec, A, Widdowson, A & contributors, JET 2017, 'Tritium analysis of divertor tiles used in JET ITER-like wall campaigns by means of ß-ray induced x-ray spectrometry', Physica Scripta, no. T170, 014014. https://doi.org/10.1088/1402-4896/aa8931

    Tritium analysis of divertor tiles used in JET ITER-like wall campaigns by means of ß-ray induced x-ray spectrometry. / Hatano, Y.; Yumizuru, K.; Koivuranta, S.; Likonen, J.; Hara, M.; Matsuyama, M.; Masuzaki, S.; Tokitani, M.; Asakura, N.; Isobe, K.; Hayashi, T.; Baron-Wiechec, A.; Widdowson, A.; contributors, JET.

    In: Physica Scripta, No. T170, 014014, 01.12.2017.

    Research output: Contribution to journalArticleScientificpeer-review

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    AU - Hatano, Y.

    AU - Yumizuru, K.

    AU - Koivuranta, S.

    AU - Likonen, J.

    AU - Hara, M.

    AU - Matsuyama, M.

    AU - Masuzaki, S.

    AU - Tokitani, M.

    AU - Asakura, N.

    AU - Isobe, K.

    AU - Hayashi, T.

    AU - Baron-Wiechec, A.

    AU - Widdowson, A.

    AU - contributors, JET

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    Y1 - 2017/12/1

    N2 - Energy spectra of β-ray induced x-rays from divertor tiles used in ITER-like wall campaigns of the Joint European Torus were measured to examine tritium (T) penetration into tungsten (W) layers. The penetration depth of T evaluated from the intensity ratio of W(Lα) x-rays to W(Mα) x-rays showed clear correlation with poloidal position; the penetration depth at the upper divertor region reached several micrometers, while that at the lower divertor region was less than 500 nm. The deep penetration at the upper part was ascribed to the implantation of high energy T produced by DD fusion reactions. The poloidal distribution of total x-ray intensity indicated higher T retention in the inboard side than the outboard side of the divertor region.

    AB - Energy spectra of β-ray induced x-rays from divertor tiles used in ITER-like wall campaigns of the Joint European Torus were measured to examine tritium (T) penetration into tungsten (W) layers. The penetration depth of T evaluated from the intensity ratio of W(Lα) x-rays to W(Mα) x-rays showed clear correlation with poloidal position; the penetration depth at the upper divertor region reached several micrometers, while that at the lower divertor region was less than 500 nm. The deep penetration at the upper part was ascribed to the implantation of high energy T produced by DD fusion reactions. The poloidal distribution of total x-ray intensity indicated higher T retention in the inboard side than the outboard side of the divertor region.

    KW - nuclear fusion

    KW - tritium

    KW - divertor

    KW - retention

    KW - tungsten

    KW - implantation

    KW - Joint European Torus

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    M3 - Article

    JO - Physica Scripta

    JF - Physica Scripta

    SN - 0031-8949

    IS - T170

    M1 - 014014

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