Development of ICRF wall conditioning technique on divertor-type tokamaks ASDEX Upgrade and JET

A. Lyssoivan, D. A. Hartmann, J. M. Noterdaeme, R. Koch, V. Bobkov, T. Blackman, F. Braun, M. Cox, P. De Vries, H. G. Esser, H. U. Fahrbach, J. Gafert, E. Gauthier, O. Gehre, M. Graham, G. Haas, A. Huber, K. Lawson, P. J. Lomas, M. MantsinenG. Matthews, M. L. Mayoral, A. Meigs, Ph Mertens, V. Mertens, I. Monakhov, J. Neuhauser, V. Philipps, V. Rohde, M. Santala, W. Suttrop, A. Walden, D. Van Eester, F. Wesner

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Résumé

Encouraging results of efficient wall conditioning with ICRF discharges achieved on the circular tokamaks (without divertors) TEXTOR, TORE SUPRA, HT-7 stimulated the next step in the development of an alternative wall conditioning technique that is relevant to reactor-scale superconducting fusion machines. Here, the first results on the ICRF discharge initiation and the wall conditioning on the large-size non-circular tokamaks ASDEX Upgrade and JET using the standard ICRF antennas are reported. Analysis of the mass-spectrum data on both machines indicates noticeable outgassing of deuterium, water and hydrocarbons from the walls despite operating with a non-optimized set of ICRF discharge parameters.

langue originaleAnglais
Pages (de - à)456-460
Nombre de pages5
journalJournal of Nuclear Materials
Volume337-339
Numéro de publication1-3 SPEC. ISS.
Les DOIs
étatPublié - 1 mars 2005

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