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

A. Baron-Wiechecc (Corresponding Author), A Widdowson, E. Alves, C.F. Ayres, N.P. Barradas, S. Brezinsek, J.P. Coad, N. Catarino, K. Heinola, J. Likonen, G.F. Matthews, M. Mayer, P. Petersson, M. Rubel, W. van Renterghem, I. Uytdenhouwen, JET EFDA Contributors

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    Abstract

    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.
    Original languageEnglish
    Pages (from-to)157-161
    JournalJournal of Nuclear Materials
    Volume463
    DOIs
    Publication statusPublished - 2015
    MoE publication typeA1 Journal article-refereed

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    Baron-Wiechecc, A., Widdowson, A., Alves, E., Ayres, C. F., Barradas, N. P., Brezinsek, S., Coad, J. P., Catarino, N., Heinola, K., Likonen, J., Matthews, G. F., Mayer, M., Petersson, P., Rubel, M., van Renterghem, W., Uytdenhouwen, I., & Contributors, JET. EFDA. (2015). Global erosion and deposition patterns in JET with the ITER-like wall. Journal of Nuclear Materials, 463, 157-161. https://doi.org/10.1016/j.jnucmat.2015.01.038