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

JET-EFDA Contributors

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Abstract A set of Be and W tiles 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
Article number48896
Pages (from-to)157-161
Number of pages5
JournalJournal of Nuclear Materials
StatePublished - 22 Jul 2015
Externally publishedYes


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