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ICRF Heating in JET During Initial Operations with the ITER-Like Wall
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SYSNO ASEP 0435786 Document Type C - Proceedings Paper (int. conf.) R&D Document Type Conference Paper Title ICRF Heating in JET During Initial Operations with the ITER-Like Wall Author(s) Jacquet, P. (GB)
Bobkov, V. (DE)
Brezinsek, S. (DE)
Brix, M. (GB)
Campergue, A.-L. (FR)
Colas, L. (FR)
Czarnecka, A. (PL)
Drewelow, P. (DE)
Graham, M. (GB)
Klepper, C.C. (US)
Lerche, E. (BE)
Mayoral, M.-L. (GB)
Meigs, A. (GB)
Milanesio, D. (IT)
Monakhov, I. (GB)
Mlynář, Jan (UFP-V) RID
Pütterich, T. (DE)
Sirinelli, A. (GB)
Van-Eester, D. (BE)Number of authors 20 Source Title AIP Conference Proceedings, 1580. - Melville : American Institute of Physics, 2014 - ISSN 0094-243X - ISBN 978-0-7354-1210-1 Pages s. 65-72 Number of pages 8 s. Publication form Print - P Action Topical conference on radio frequency power in plasmas/20./ Event date 25.06.2013-28.06.2013 VEvent location Sorrento Country IT - Italy Event type WRD Language eng - English Country US - United States Keywords Tokamak ; JET ; ICRF Subject RIV BL - Plasma and Gas Discharge Physics Institutional support UFP-V - RVO:61389021 UT WOS 000339626400008 EID SCOPUS 84906330557 DOI https://doi.org/10.1063/1.4864503 Annotation The impact of the new wall material on the JET Ion Cyclotron Resonance Frequency (ICRF) operation was assessed and also the properties of JET plasmas heated with ICRF were studied. No substantial change of the antenna coupling resistance was observed with the ILW as compared with the carbon wall. Heat-fluxes on the protecting limiters close the antennas quantified using Infra-Red (IR) thermography (maximum 4.5 MW/m(2) in current drive phasing) are within the wall power load handling capabilities. A simple RF sheath rectification model using the antenna near-fields calculated with the TOPICA code can well reproduce the heat-flux pattern around the antennas. ICRF heating results in larger tungsten and nickel (Ni) contents in the plasma and in a larger core radiation when compared to Neutral Beam Injection (NET) heating. Workplace Institute of Plasma Physics Contact Vladimíra Kebza, kebza@ipp.cas.cz, Tel.: 266 052 975 Year of Publishing 2015
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