Overview of experimental preparation for the ITER-Like Wall at JET

TitleOverview of experimental preparation for the ITER-Like Wall at JET
Publication TypeJournal Article
Year of Publication2011
AuthorsS. Brezinsek, W. Fundamenski, T. Eich, J.P Coad, C. Giroud, A. Huber, S. Jachmich, E. Joffrin, K. Krieger, K. McCormick, M. Lehnen, T. Loarer, E. de la Luna, G. Maddison, G.F Matthews, P. Mertens, I. Nunes, V. Philipps, V. Riccardo, M. Rubel, M.F Stamp, M. Tsalas
JournalJournal of Nuclear Materials
Date PublishedAug
Type of ArticleArticle; Proceedings Paper
ISBN Number0022-3115
Keywordsdivertor, PROJECT, Tungsten

Experiments in JET with carbon-based plasma-facing components have been carried out in preparation of the ITER-Like Wall with beryllium main chamber and full tungsten divertor. The preparatory work was twofold: (i) development of techniques, which ensure safe operation with the new wall and (ii) provision of reference plasmas, which allow a comparison of operation with carbon and metallic wall. (i) Compatibility with the W divertor with respect to energy loads could be achieved in N-2 seeded plasmas at high densities and low temperatures, finally approaching partial detachment, with only moderate confinement reduction of 10%. Strike-point sweeping increases the operational space further by re-distributing the load over several components. (ii) Be and C migration to the divertor has been documented with spectroscopy and QMBs under different plasma conditions providing a database which will allow a comparison of the material transport to remote areas with metallic walls. Fuel retention rates of 1.0-2.0 x 10(21) D s(-1) were obtained as references in accompanied gas balance studies. (C) 2010 Published by Elsevier B.V.







Alternate TitleJ. Nucl. Mater.

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