Erosion of tungsten and steel in the main chamber of ASDEX Upgrade

A. Hakola (Corresponding Author), S. Koivuranta, S. Likonen, A. Herrmann, H. Maier, M. Mayer, R. Neu, V. Rohde, ASDEX Upgrade Team

    Research output: Contribution to journalArticleScientificpeer-review

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    Abstract

    We have investigated net erosion and deposition of W and P92 steel in ASDEX Upgrade during its full-W operational phase. The outer divertor and the outer midplane are the strongest net erosion region for W, with rates up to 0.12 nm/s and 0.05 nm/s, respectively. The eroded W is transported via the scrape-off layer plasma and predominantly deposited in the upper (20-30%) and inner divertors (40-60%). The inner midplane does not contribute significantly to the erosion-deposition balance such that the remaining W is deposited in shadowed areas of the tokamak. Steel is eroded 3-10 times faster than W but could be used at the top and inner parts of the main chamber where the erosion rate is 0.01 nm/s.
    Original languageEnglish
    Pages (from-to)162-165
    JournalJournal of Nuclear Materials
    Volume463
    DOIs
    Publication statusPublished - 2015
    MoE publication typeA1 Journal article-refereed

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    Tungsten
    Steel
    erosion
    Erosion
    tungsten
    chambers
    steels
    plasma layers
    Plasmas

    Cite this

    Hakola, A. ; Koivuranta, S. ; Likonen, S. ; Herrmann, A. ; Maier, H. ; Mayer, M. ; Neu, R. ; Rohde, V. ; Team, ASDEX Upgrade. / Erosion of tungsten and steel in the main chamber of ASDEX Upgrade. In: Journal of Nuclear Materials. 2015 ; Vol. 463. pp. 162-165.
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    abstract = "We have investigated net erosion and deposition of W and P92 steel in ASDEX Upgrade during its full-W operational phase. The outer divertor and the outer midplane are the strongest net erosion region for W, with rates up to 0.12 nm/s and 0.05 nm/s, respectively. The eroded W is transported via the scrape-off layer plasma and predominantly deposited in the upper (20-30{\%}) and inner divertors (40-60{\%}). The inner midplane does not contribute significantly to the erosion-deposition balance such that the remaining W is deposited in shadowed areas of the tokamak. Steel is eroded 3-10 times faster than W but could be used at the top and inner parts of the main chamber where the erosion rate is 0.01 nm/s.",
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    Erosion of tungsten and steel in the main chamber of ASDEX Upgrade. / Hakola, A. (Corresponding Author); Koivuranta, S.; Likonen, S.; Herrmann, A.; Maier, H.; Mayer, M.; Neu, R.; Rohde, V.; Team, ASDEX Upgrade.

    In: Journal of Nuclear Materials, Vol. 463, 2015, p. 162-165.

    Research output: Contribution to journalArticleScientificpeer-review

    TY - JOUR

    T1 - Erosion of tungsten and steel in the main chamber of ASDEX Upgrade

    AU - Hakola, A.

    AU - Koivuranta, S.

    AU - Likonen, S.

    AU - Herrmann, A.

    AU - Maier, H.

    AU - Mayer, M.

    AU - Neu, R.

    AU - Rohde, V.

    AU - Team, ASDEX Upgrade

    PY - 2015

    Y1 - 2015

    N2 - We have investigated net erosion and deposition of W and P92 steel in ASDEX Upgrade during its full-W operational phase. The outer divertor and the outer midplane are the strongest net erosion region for W, with rates up to 0.12 nm/s and 0.05 nm/s, respectively. The eroded W is transported via the scrape-off layer plasma and predominantly deposited in the upper (20-30%) and inner divertors (40-60%). The inner midplane does not contribute significantly to the erosion-deposition balance such that the remaining W is deposited in shadowed areas of the tokamak. Steel is eroded 3-10 times faster than W but could be used at the top and inner parts of the main chamber where the erosion rate is 0.01 nm/s.

    AB - We have investigated net erosion and deposition of W and P92 steel in ASDEX Upgrade during its full-W operational phase. The outer divertor and the outer midplane are the strongest net erosion region for W, with rates up to 0.12 nm/s and 0.05 nm/s, respectively. The eroded W is transported via the scrape-off layer plasma and predominantly deposited in the upper (20-30%) and inner divertors (40-60%). The inner midplane does not contribute significantly to the erosion-deposition balance such that the remaining W is deposited in shadowed areas of the tokamak. Steel is eroded 3-10 times faster than W but could be used at the top and inner parts of the main chamber where the erosion rate is 0.01 nm/s.

    U2 - 10.1016/j.jnucmat.2014.11.034

    DO - 10.1016/j.jnucmat.2014.11.034

    M3 - Article

    VL - 463

    SP - 162

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    JO - Journal of Nuclear Materials

    JF - Journal of Nuclear Materials

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    ER -