An overview of erosion-deposition studies for the JET Mk II high delta divertor

A. Widdowson, S. Brezinsek, J. P. Coad, D. E. Hole, Jari Likonen, V. Philipps, M. Rubel, M. F. Stamp, JET-EFDA contributors

    Research output: Contribution to journalArticleScientificpeer-review

    20 Citations (Scopus)

    Abstract

    Post-mortem analyses of tiles removed from the JET MkII HD divertor in 2007 are presented. The results indicate an increase in deposition at the outer plasma-shadowed region of the divertor, not seen prior to 2004 and indicate a shift away from the asymmetric picture of net deposition at the inner divertor compared with no overall deposition or erosion at the outer divertor. Surface analysis of the inner and outer vertical divertor tiles is largely the same as observed previously; however, a notable increase in Be composition on the inner and outer floor tiles is observed. An attempt has been made to correlate these data with campaign-averaged plasma configurations and spectroscopy results. While some changes in deposition/erosion characteristics can be explained, further detailed analysis of diagnostics and especially of time-resolved data, such as from rotating collector and quartz microbalance diagnostics, is required.
    Original languageEnglish
    Article number014005
    JournalPhysica Scripta
    Issue numberT138
    DOIs
    Publication statusPublished - 2009
    MoE publication typeA1 Journal article-refereed

    Fingerprint

    Erosion
    erosion
    Tile
    tiles
    Diagnostics
    Plasma
    Correlate
    Spectroscopy
    Rotating
    microbalances
    accumulators
    Vertical
    quartz
    Configuration
    shift
    configurations
    spectroscopy

    Cite this

    Widdowson, A., Brezinsek, S., Coad, J. P., Hole, D. E., Likonen, J., Philipps, V., ... contributors, JET-EFDA. (2009). An overview of erosion-deposition studies for the JET Mk II high delta divertor. Physica Scripta, (T138), [014005]. https://doi.org/10.1088/0031-8949/2009/T138/014005
    Widdowson, A. ; Brezinsek, S. ; Coad, J. P. ; Hole, D. E. ; Likonen, Jari ; Philipps, V. ; Rubel, M. ; Stamp, M. F. ; contributors, JET-EFDA. / An overview of erosion-deposition studies for the JET Mk II high delta divertor. In: Physica Scripta. 2009 ; No. T138.
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    title = "An overview of erosion-deposition studies for the JET Mk II high delta divertor",
    abstract = "Post-mortem analyses of tiles removed from the JET MkII HD divertor in 2007 are presented. The results indicate an increase in deposition at the outer plasma-shadowed region of the divertor, not seen prior to 2004 and indicate a shift away from the asymmetric picture of net deposition at the inner divertor compared with no overall deposition or erosion at the outer divertor. Surface analysis of the inner and outer vertical divertor tiles is largely the same as observed previously; however, a notable increase in Be composition on the inner and outer floor tiles is observed. An attempt has been made to correlate these data with campaign-averaged plasma configurations and spectroscopy results. While some changes in deposition/erosion characteristics can be explained, further detailed analysis of diagnostics and especially of time-resolved data, such as from rotating collector and quartz microbalance diagnostics, is required.",
    author = "A. Widdowson and S. Brezinsek and Coad, {J. P.} and Hole, {D. E.} and Jari Likonen and V. Philipps and M. Rubel and Stamp, {M. F.} and JET-EFDA contributors",
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    Widdowson, A, Brezinsek, S, Coad, JP, Hole, DE, Likonen, J, Philipps, V, Rubel, M, Stamp, MF & contributors, JET-EFDA 2009, 'An overview of erosion-deposition studies for the JET Mk II high delta divertor', Physica Scripta, no. T138, 014005. https://doi.org/10.1088/0031-8949/2009/T138/014005

    An overview of erosion-deposition studies for the JET Mk II high delta divertor. / Widdowson, A.; Brezinsek, S.; Coad, J. P.; Hole, D. E.; Likonen, Jari; Philipps, V.; Rubel, M.; Stamp, M. F.; contributors, JET-EFDA.

    In: Physica Scripta, No. T138, 014005, 2009.

    Research output: Contribution to journalArticleScientificpeer-review

    TY - JOUR

    T1 - An overview of erosion-deposition studies for the JET Mk II high delta divertor

    AU - Widdowson, A.

    AU - Brezinsek, S.

    AU - Coad, J. P.

    AU - Hole, D. E.

    AU - Likonen, Jari

    AU - Philipps, V.

    AU - Rubel, M.

    AU - Stamp, M. F.

    AU - contributors, JET-EFDA

    PY - 2009

    Y1 - 2009

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    AB - Post-mortem analyses of tiles removed from the JET MkII HD divertor in 2007 are presented. The results indicate an increase in deposition at the outer plasma-shadowed region of the divertor, not seen prior to 2004 and indicate a shift away from the asymmetric picture of net deposition at the inner divertor compared with no overall deposition or erosion at the outer divertor. Surface analysis of the inner and outer vertical divertor tiles is largely the same as observed previously; however, a notable increase in Be composition on the inner and outer floor tiles is observed. An attempt has been made to correlate these data with campaign-averaged plasma configurations and spectroscopy results. While some changes in deposition/erosion characteristics can be explained, further detailed analysis of diagnostics and especially of time-resolved data, such as from rotating collector and quartz microbalance diagnostics, is required.

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