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

J.P. Coad (Corresponding Author), S. Gruenhagen, D.E. Hole, Antti Hakola, Seppo Koivuranta, Jari Likonen, M. Rubel, A. Widdowson, JET-EFDA collaborators

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    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
    Article number014003
    Number of pages6
    JournalPhysica Scripta
    Issue numberT145
    Publication statusPublished - 2011
    MoE publication typeA1 Journal article-refereed


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