Počet záznamů: 1
Scaling of L-mode heat flux for ITER and COMPASS-U divertors, based on five tokamaks
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SYSNO ASEP 0531255 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Článek ve WOS Název Scaling of L-mode heat flux for ITER and COMPASS-U divertors, based on five tokamaks Tvůrce(i) Horáček, Jan (UFP-V) RID, ORCID
Adámek, Jiří (UFP-V) RID, ORCID
Komm, Michael (UFP-V) RID, ORCID
Seidl, Jakub (UFP-V) RID
Vondráček, Petr (UFP-V) RID, ORCID
Jardin, A. (FR)
Guillemaut, C. (PT)
Elmore, S. (GB)
Thornton, A. (GB)
Jiráková, Kateřina (UFP-V)
Jaulmes, Fabien (UFP-V) ORCID
Deng, G. (CN)
Gao, X. (CN)
Wang, L. (CN)
Ding, R. (CN)
Brunner, D. (US)
LaBombard, B. (US)
Olsen, J. (DK)
Rasmussen, J.J. (DK)
Nielsen, A.H. (DK)
Naulin, V. (DK)
Ezzat, M. (DK)
Camacho, K. (FR)
Hron, Martin (UFP-V) RID, ORCID
Matthews, G. F. (GB)Celkový počet autorů 25 Číslo článku 066016 Zdroj.dok. Nuclear Fusion. - : Institute of Physics Publishing - ISSN 0029-5515
Roč. 60, č. 6 (2020)Poč.str. 12 s. Jazyk dok. eng - angličtina Země vyd. AT - Rakousko Klíč. slova COMPASS-Upgrade ; divertor ; heat flux ; iter ; L-mode ; scaling ; tokamak Vědní obor RIV BL - Fyzika plazmatu a výboje v plynech Obor OECD Fluids and plasma physics (including surface physics) CEP GA19-15229S GA ČR - Grantová agentura ČR LM2015045 GA MŠMT - Ministerstvo školství, mládeže a tělovýchovy EF16_013/0001551 GA MŠMT - Ministerstvo školství, mládeže a tělovýchovy Způsob publikování Open access Institucionální podpora UFP-V - RVO:61389021 UT WOS 000535881300001 EID SCOPUS 85085610465 DOI 10.1088/1741-4326/ab7e47 Anotace This contribution aims to improve existing scalings of the L-mode power decay length λqomp, especially for plasma configurations with strike points at the ITER-relevant location closed vertical divertor targets. We propose 13 new λqomp scalings based on data from the tokamaks JET, EAST, MAST, Alcator C-mod and COMPASS, and validate them against the output of the 2D turbulence code HESEL. The analysis covers 500 divertor heat flux profiles (obtained by probes or IR cameras), measured in L-mode discharges with varying 12 global plasma parameters (all well predictable). We find that the two previously published scalings (Eich 2013 J. Nucl. Mat. 438 S72) and (Scarabosio 2013 J. Nucl. Mat. 438 S426), which were based on outer target data from AUG and JET, describe the JET, C-mod and COMPASS profiles well. This holds not only at the outer horizontal and vertical targets, but surprisingly also at the inner vertical targets. In contrast, EAST, HESEL and especially MAST data are poorly described by these two scalings. We therefore derive 13 new scalings, which account for 85-92 % of the measured λqomp variability across all five tokamaks. Although each of the scalings is based on a different parameter combination, their predictions for the ITER and COMPASS-Upgrade tokamaks are very similar. Just before the L-H transition in the ITER baseline scenario, the presented scalings predict values λqomp = 3.0 ± 0.5 mm. For the COMPASS-Upgrade tokamak, all the scalings predict λqomp = 2.1 ± 0.5 mm with a single exception of the scaling based on the stored plasma energy which predicts only 1.2 mm for both tokamaks. We encourage the reader to use as many of these scalings as possible, depending on available data. In attached plasma and using significant assumptions, our results imply steady-state surface-perpendicular heat flux around 10 MW/m2 for ITER, and 20 MW/m2 for COMPASS-Upgrade. Pracoviště Ústav fyziky plazmatu Kontakt Vladimíra Kebza, kebza@ipp.cas.cz, Tel.: 266 052 975 Rok sběru 2021 Elektronická adresa https://iopscience.iop.org/article/10.1088/1741-4326/ab7e47/pdf
Počet záznamů: 1