Erosion and deposition in the JET divertor during the first ILW campaign

Matej Mayer, Stepan Krat, Wouter Van Renterghem, Aleksandra Baron-Wiechec, Sebastijan Brezinsek, Igor Bykov, Paul Coad, Yuri Gasparyan, Kalle Heinola, Jari Likonen, Alexander Pisarev, Christian Ruset, G. de Saint-Aubin, Anna Widdowson

    Research outputpeer-review


    Erosion and deposition were studied in the JET divertor during the first JET ITER-like wall campaign 2011 to 2012 using marker tiles. An almost complete poloidal section consisting of tiles 0, 1, 3, 4, 6, 7, 8 was studied. The data from divertor tile surfaces were completed by the analysis of samples from remote divertor areas and from the inner wall cladding. The total mass of material deposited in the divertor decreased by a factor of 4–9 compared to the deposition of carbon during all-carbon JET operation before 2010. Deposits in 2011 to 2012 consist mainly of beryllium with 5–20 at.% of carbon and oxygen, respectively, and small amounts of Ni, Cr, Fe and W. This decrease of material deposition in the divertor is accompanied by a decrease of total deuterium retention inside the JET vessel by a factor of 10 to 20. The detailed erosion/deposition pattern in the divertor with the ITER-like wall configuration shows rigorous changes compared to the pattern with the all-carbon JET configuration.
    Original languageEnglish
    Title of host publication
    Number of pages9
    StatePublished - 21 Jan 2016

    Publication series

    NamePhysica Scripta
    PublisherIOP - IOP Publishing
    ISSN (Print)0031-8949

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