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

    30 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

    Fingerprint

    Tungsten
    erosion
    Erosion
    tungsten
    arcs
    baffles
    Sputtering
    sputtering
    Profilometry
    tiles
    Tile
    temporal resolution
    Carbon
    spatial resolution
    damage
    Plasmas
    Scanning electron microscopy
    electrical resistivity
    scanning electron microscopy
    carbon

    Cite this

    Rohde, V., Endstrasser, N., von Toussaint, U., Balden, M., Lunt, T., Neu, R., ... 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
    Rohde, V. ; Endstrasser, N. ; von Toussaint, U. ; Balden, M. ; Lunt, T. ; Neu, R. ; Hakola, Antti ; Bucalossi, J. ; ASDEX Upgrade Team. / Tungsten erosion by arcs in ASDEX Upgrade. In: Journal of Nuclear Materials. 2011 ; Vol. 415, No. 1, supplement. pp. S46-S50.
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    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.",
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    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, vol. 415, no. 1, supplement, pp. S46-S50. https://doi.org/10.1016/j.jnucmat.2010.11.045

    Tungsten erosion by arcs in ASDEX Upgrade. / Rohde, V. (Corresponding Author); Endstrasser, N.; von Toussaint, U.; Balden, M.; Lunt, T.; Neu, R.; Hakola, Antti; Bucalossi, J.; ASDEX Upgrade Team.

    In: Journal of Nuclear Materials, Vol. 415, No. 1, supplement, 2011, p. S46-S50.

    Research output: Contribution to journalArticleScientificpeer-review

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    AU - Rohde, V.

    AU - Endstrasser, N.

    AU - von Toussaint, U.

    AU - Balden, M.

    AU - Lunt, T.

    AU - Neu, R.

    AU - Hakola, Antti

    AU - Bucalossi, J.

    AU - ASDEX Upgrade Team

    PY - 2011

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    AB - 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.

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    ER -

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