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Tungsten transport in JET H-mode plasmas in hybrid scenario, experimental observations and modelling
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SYSNO ASEP 0435641 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Tungsten transport in JET H-mode plasmas in hybrid scenario, experimental observations and modelling Author(s) Angioni, C. (DE)
Mantica, P. (IT)
Pütterich, T. (DE)
Valisa, M. (IT)
Baruzzo, M. (IT)
Belli, A.E. (US)
Belo, P. (PT)
Casson, F.J. (GB)
Challis, C. (GB)
Drewelow, P. (DE)
Giroud, C. (GB)
Hawkes, N. (GB)
Hender, T.C. (GB)
Hobirk, J. (DE)
Koskela, T. (FI)
Lauro Taroni, L. (IT)
Maggi, C.F. (DE)
Mlynář, Jan (UFP-V) RID
Odstrčil, T. (DE)
Reinke, M.L. (GB)
Romanelli, M. (GB)Number of authors 22 Source Title Nuclear Fusion. - : Institute of Physics Publishing - ISSN 0029-5515
Roč. 54, č. 8 (2014), 083028-083028Number of pages 26 s. Publication form Print - P Language eng - English Country AT - Austria Keywords heavy impurity transport ; H-mode hybrid scenario ; neoclassical and turbulent transport Subject RIV BL - Plasma and Gas Discharge Physics Institutional support UFP-V - RVO:61389021 UT WOS 000339991600032 EID SCOPUS 84904959796 DOI 10.1088/0029-5515/54/8/083028 Annotation The behaviour of tungsten in the core of hybrid scenario plasmas in JET with the ITER-like wall is analysed and modelled with a combination of neoclassical and gyrokinetic codes. In these discharges, good confinement conditions can be maintained only for the first 2–3 s of the high power phase. Later W accumulation is regularly observed, often accompanied by the onset of magneto-hydrodynamical activity, in particular neoclassical tearing modes (NTMs), both of which have detrimental effects on the global energy confinement. The dynamics of the accumulation process is examined, taking into consideration the concurrent evolution of the background plasma profiles, and the possible onset of NTMs. Two time slices of a representative discharge, before and during the accumulation process, are analysed with two independent methods, in order to reconstruct the W density distribution over the poloidal cross-section Workplace Institute of Plasma Physics Contact Vladimíra Kebza, kebza@ipp.cas.cz, Tel.: 266 052 975 Year of Publishing 2015
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