Global erosion and deposition patterns in JET with the ITER-like wall

Aleksandra Baron-Wiechec, Anna Widdowson, Eduardo Alves, Charkie Ayres, Nuno Barradas, Sebastijan Brezinsek, Paul Coad, Norberto Catarino, Kalle Heinola, Jari Likonen, Guy Matthews, Matej Mayer, Per Petersson, Marek Rubel, Wouter Van Renterghem, Inge Uytdenhouwen

    Research outputpeer-review


    A set of Be and Wtiles removed after the first ITER-like wall campaigns (JET-ILW) from 2011 to 2012 has been analysed. The results indicate that the primary erosion site is in the main chamber (Be) as in previous carbon campaigns (JET-C). In particular the limiters tiles near the mid-plane are eroded probably during the limiter phases of discharges. W is found at low concentrations on all plasma-facing surfaces of the vessel indicating deposition via plasma transport initially from the W divertor and from main chamber W-coated tiles; there are also traces of Mo (used as an interlayer for these coatings). Deposited films in the inner divertor have a layered structure, and every layer is dominated by Be with some W and O content.
    Original languageEnglish
    Pages (from-to)157-161
    JournalJournal of Nuclear Materials
    StatePublished - Aug 2015
    Event21st International Conference on Plasma-Surface Interactions in Controlled Fusion Devices - Kanazawa
    Duration: 26 May 201430 May 2014

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