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

    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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