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Pedestal structure, stability and scalings in JET-ILW: The EUROfusion JET-ILW pedestal database
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SYSNO ASEP 0555269 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Pedestal structure, stability and scalings in JET-ILW: The EUROfusion JET-ILW pedestal database Author(s) Frassinetti, L. (SE)
Saarelma, S. (GB)
Verdoolaege, G. (BE)
Groth, M. (FI)
Hillesheim, J. (GB)
Bílková, Petra (UFP-V) RID
Böhm, Petr (UFP-V) RID
Dunne, M. (DE)
Fridström, R. (SE)
Giovannozzi, E. (IT)
Imbeaux, F. (FR)
Labit, B. (CH)
De La Luna, E. (ES)
Maggi, C. (GB)
Owsiak, M. (PL)
Scannell, R. (GB)Number of authors 16 Article number 016001 Source Title Nuclear Fusion. - : Institute of Physics Publishing - ISSN 0029-5515
Roč. 61, č. 1 (2021)Number of pages 50 s. Language eng - English Country AT - Austria Keywords pedestal ; JET ; tokamak Subject RIV BL - Plasma and Gas Discharge Physics OECD category Fluids and plasma physics (including surface physics) Method of publishing Limited access Institutional support UFP-V - RVO:61389021 UT WOS 000599113800001 EID SCOPUS 85098242677 DOI 10.1088/1741-4326/abb79e Annotation The EUROfusion JET-ILW pedestal database is described, with emphasis on three main issues. First, the technical aspects are introduced, including a description of the data selection, the datasets, the diagnostics used, the experimental and theoretical methods implemented and the main definitions. Second, the JET-ILW pedestal structure and stability are described. In particular, the work describes the links between the engineering parameters (power, gas and divertor configuration) and the disagreement with the peeling-ballooning (PB) model implemented with ideal magnetohydrodynamics equations. Specifically, the work clarifies why the JET-ILW pedestal tends to be far from the PB boundary at high gas and high power, showing that a universal threshold in power and gas cannot be found but that the relative shift (the distance between the position of the pedestal density and of the pedestal temperature) plays a key role. These links are then used to achieve an empirical explanation of the behavior of the JET-ILW pedestal pressure with gas, power and divertor configuration. Third, the pedestal database is used to revise the scaling law of the pedestal stored energy. The work shows a reasonable agreement with the earlier Cordey scaling in terms of plasma current and triangularity dependence, but highlights some differences in terms of power and isotope mass dependence. Workplace Institute of Plasma Physics Contact Vladimíra Kebza, kebza@ipp.cas.cz, Tel.: 266 052 975 Year of Publishing 2022 Electronic address https://iopscience.iop.org/article/10.1088/1741-4326/abb79e
Number of the records: 1