Overview of JET post-mortem results following the 2007-9 operational period, and comparisons with previous campaigns

J.P. Coad, S. Gruenhagen, D.E. Hole, Antti Hakola, Seppo Koivuranta, Jari Likonen, M. Rubel, M. Stamp, A. Widdowson, JET-EFDA contributors

    Research output: Contribution to journalArticle in a proceedings journalScientificpeer-review

    Abstract

    In 2010, all the plasma-facing components were removed from JET so that the carbon-based surfaces could be replaced with beryllium (Be) or tungsten as part of the ITER-like wall (ILW) project.
    This gives unprecedented opportunities for post-mortem analyses of these plasma-facing surfaces; this paper reviews the data obtained so far and relates the information to studies of tiles removed during previous JET shutdowns. The general pattern of erosion/deposition at the JET divertor has been maintained, with deposition of impurities in the scrape-off layer (SOL) at the inner divertor and preferential removal of carbon and transport into the corner. However, the remaining films in the SOL contain very high Be/C ratios at the surface.
    The first measurements of erosion using a tile profiler have been completed, with up to 200 microns erosion being recorded at points on the inner wall guard limiters.
    Original languageEnglish
    Number of pages6
    JournalPhysica Scripta
    Volume2011
    Issue numberT145
    DOIs
    Publication statusPublished - 2011
    MoE publication typeA4 Article in a conference publication
    Event13th International Workshop on Plasma-Facing Materials and Components for Fusion Applications, PFMC-13 - Rosenheim, Germany
    Duration: 9 May 201113 May 2011

    Fingerprint

    Erosion
    erosion
    tiles
    Tile
    beryllium
    Carbon
    Plasma
    shutdowns
    Limiter
    carbon
    Impurities
    tungsten
    impurities

    Cite this

    Coad, J.P. ; Gruenhagen, S. ; Hole, D.E. ; Hakola, Antti ; Koivuranta, Seppo ; Likonen, Jari ; Rubel, M. ; Stamp, M. ; Widdowson, A. ; contributors, JET-EFDA. / Overview of JET post-mortem results following the 2007-9 operational period, and comparisons with previous campaigns. In: Physica Scripta. 2011 ; Vol. 2011, No. T145.
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    abstract = "In 2010, all the plasma-facing components were removed from JET so that the carbon-based surfaces could be replaced with beryllium (Be) or tungsten as part of the ITER-like wall (ILW) project. This gives unprecedented opportunities for post-mortem analyses of these plasma-facing surfaces; this paper reviews the data obtained so far and relates the information to studies of tiles removed during previous JET shutdowns. The general pattern of erosion/deposition at the JET divertor has been maintained, with deposition of impurities in the scrape-off layer (SOL) at the inner divertor and preferential removal of carbon and transport into the corner. However, the remaining films in the SOL contain very high Be/C ratios at the surface. The first measurements of erosion using a tile profiler have been completed, with up to 200 microns erosion being recorded at points on the inner wall guard limiters.",
    author = "J.P. Coad and S. Gruenhagen and D.E. Hole and Antti Hakola and Seppo Koivuranta and Jari Likonen and M. Rubel and M. Stamp and A. Widdowson and JET-EFDA contributors",
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    Overview of JET post-mortem results following the 2007-9 operational period, and comparisons with previous campaigns. / Coad, J.P.; Gruenhagen, S.; Hole, D.E.; Hakola, Antti; Koivuranta, Seppo; Likonen, Jari; Rubel, M.; Stamp, M.; Widdowson, A.; contributors, JET-EFDA.

    In: Physica Scripta, Vol. 2011, No. T145, 2011.

    Research output: Contribution to journalArticle in a proceedings journalScientificpeer-review

    TY - JOUR

    T1 - Overview of JET post-mortem results following the 2007-9 operational period, and comparisons with previous campaigns

    AU - Coad, J.P.

    AU - Gruenhagen, S.

    AU - Hole, D.E.

    AU - Hakola, Antti

    AU - Koivuranta, Seppo

    AU - Likonen, Jari

    AU - Rubel, M.

    AU - Stamp, M.

    AU - Widdowson, A.

    AU - contributors, JET-EFDA

    PY - 2011

    Y1 - 2011

    N2 - In 2010, all the plasma-facing components were removed from JET so that the carbon-based surfaces could be replaced with beryllium (Be) or tungsten as part of the ITER-like wall (ILW) project. This gives unprecedented opportunities for post-mortem analyses of these plasma-facing surfaces; this paper reviews the data obtained so far and relates the information to studies of tiles removed during previous JET shutdowns. The general pattern of erosion/deposition at the JET divertor has been maintained, with deposition of impurities in the scrape-off layer (SOL) at the inner divertor and preferential removal of carbon and transport into the corner. However, the remaining films in the SOL contain very high Be/C ratios at the surface. The first measurements of erosion using a tile profiler have been completed, with up to 200 microns erosion being recorded at points on the inner wall guard limiters.

    AB - In 2010, all the plasma-facing components were removed from JET so that the carbon-based surfaces could be replaced with beryllium (Be) or tungsten as part of the ITER-like wall (ILW) project. This gives unprecedented opportunities for post-mortem analyses of these plasma-facing surfaces; this paper reviews the data obtained so far and relates the information to studies of tiles removed during previous JET shutdowns. The general pattern of erosion/deposition at the JET divertor has been maintained, with deposition of impurities in the scrape-off layer (SOL) at the inner divertor and preferential removal of carbon and transport into the corner. However, the remaining films in the SOL contain very high Be/C ratios at the surface. The first measurements of erosion using a tile profiler have been completed, with up to 200 microns erosion being recorded at points on the inner wall guard limiters.

    U2 - 10.1088/0031-8949/2011/T145/014003

    DO - 10.1088/0031-8949/2011/T145/014003

    M3 - Article in a proceedings journal

    VL - 2011

    JO - Physica Scripta

    JF - Physica Scripta

    SN - 0031-8949

    IS - T145

    ER -