Tungsten erosion and redeposition in the all-tungsten divertor of ASDEX Upgrade

M. Mayer (Corresponding Author), M. Andrzejczuk, R. Dux, E. Fortuna-Zalesna, Antti Hakola, Seppo Koivuranta, K. Krieger, K.J. Kurzydlowski, Jari Likonen, G. Matern, R. Neu, G. Ramos, M. Rasinski, V. Rohde, K. Sugiyama, A. Wiltner, Zielinski, ASDEX Upgrade Team

    Research output: Contribution to journalArticleScientificpeer-review

    34 Citations (Scopus)

    Abstract

    Net erosion and deposition of tungsten (W) in the ASDEX Upgrade divertor were determined after the 2007 campaign by using thin W marker stripes. ASDEX Upgrade had full-W plasma-facing components during this campaign. The inner divertor and the roof baffle were net W deposition areas with a maximum deposition of about 1×1018W-atoms cm-2 in the private flux region below the inner strike point. Net erosion of W was observed in the whole outer divertor, with the largest erosion close to the outer strike point. Only a small fraction of the W eroded in the main chamber and in the outer divertor was found in redeposits in the inner divertor, while a large fraction was either redeposited at unidentified places in the main chamber or has formed dust.
    Original languageEnglish
    Article number014039
    Number of pages7
    JournalPhysica Scripta
    Issue numberT138
    DOIs
    Publication statusPublished - 2009
    MoE publication typeA1 Journal article-refereed
    Event12th International Workshop on Plasma-Facing Materials and Components for Fusion Applications, PFMC-12 - Jülich, Germany
    Duration: 11 May 200914 May 2009

    Keywords

    • plasma physics
    • tokamaks
    • divertors
    • plasma-material interactions

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