Contrasting H-mode behaviour with deuterium fuelling and nitrogen seeding in the all-carbon and metallic versions of JET

G. P. Maddison , C. Giroud , B. Alper , G. Arnoux , I. Balboa , M. N. A. Beurskens , A. Boboc , S. Brezinsek

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M. Brix M. Clever R. Coelho J. W. Coenen I. Coffey P. C. da Silva Aresta Belo S. Devaux P. Devynck T. Eich R. C. Felton J. Flanagan L. Frassinetti L. Garzotti M. Groth S. Jachmich A. J\"arvinen E. Joffrin M. A. H. Kempenaars U. Kruezi K. D. Lawson M. Lehnen M. J. Leyland Y. Liu P. J. Lomas C. G. Lowry S. Marsen G.F. Matthews G. K. McCormick A. G. Meigs A. W. Morris R. Neu I. M. Nunes M. Oberkofler F. G. Rimini S. Saarelma B. Sieglin A. C. C. Sips A. Sirinelli M. F. Stamp G. J. van Rooij D. J. Ward M. Wischmeier JET EFDA contributors

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classification ⚛️ physics.plasm-ph

keywords all-carbondeuteriumfuellingh-modeiterseedingamelioratebeen

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The former all-carbon wall on JET has been replaced with beryllium in the main torus and tungsten in the divertor to mimic the surface materials envisaged for ITER. Comparisons are presented between Type I H-mode characteristics in each design by examining respective scans over deuterium fuelling and impurity seeding, required to ameliorate exhaust loads both in JET at full capability and in ITER.

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Contrasting H-mode behaviour with deuterium fuelling and nitrogen seeding in the all-carbon and metallic versions of JET

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