Global erosion and deposition patterns in JET with the ITER-like wall
- Baron-Wiechec, Alexandra
- Widdowson, A.
- Alves, E.
- Ayres, C.F.
- Barradas, N.P.
- Brezinsek, S.
- Coad, J.P.
- Catarino, N.
- Heinola, K.
- Likonen, Jari
- Matthews, G.F.
- Mayer, M.
- Petersson, P.
- Rubel, M.
- van Renterghem, W.
- Uytdenhouwen, I.
Publication date
January 2015
DOIAbstract
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 Wand O content
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