Tungsten erosion by arcs in ASDEX Upgrade

V. Rohde (Corresponding Author), N. Endstrasser, U. von Toussaint, M. Balden, T. Lunt, R. Neu, Antti Hakola, J. Bucalossi, ASDEX Upgrade Team

    Research output: Contribution to journalArticleScientificpeer-review

    34 Citations (Scopus)

    Abstract

    The transition from carbon to high-Z divertor devices reduces the erosion of the plasma facing components (PFC) strongly. Arcing as second erosion mechanism beside physical sputtering may now dominating the erosion. A procedure based on photographic techniques, profilometry and scanning electron microscopy was developed to investigate arc damage in ASDEX Upgrade. At the inner divertor baffle region erosion by arcing dominates the physical sputtering by a factor of 7. Whereas the number of arc traces only depends on the position of the tile, the effective erosion strongly depends on the surface resistivity of the PFCs. Video observations with high temporal and spatial resolution correlates the onset of arcing with the appearance of ELMs at the inner divertor baffle.
    Original languageEnglish
    Pages (from-to)S46-S50
    JournalJournal of Nuclear Materials
    Volume415
    Issue number1, supplement
    DOIs
    Publication statusPublished - 2011
    MoE publication typeA1 Journal article-refereed
    Event19th International Conference on Plasma Surface Interactions in Controlled Fusion Devices, PSI-19 - San Diego, United States
    Duration: 24 May 201028 May 2010

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  • Cite this

    Rohde, V., Endstrasser, N., von Toussaint, U., Balden, M., Lunt, T., Neu, R., Hakola, A., Bucalossi, J., & ASDEX Upgrade Team (2011). Tungsten erosion by arcs in ASDEX Upgrade. Journal of Nuclear Materials, 415(1, supplement), S46-S50. https://doi.org/10.1016/j.jnucmat.2010.11.045