Počet záznamů: 1
Empirical scaling of the n = 2 error field penetration threshold in tokamaks
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SYSNO ASEP 0541091 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Článek ve WOS Název Empirical scaling of the n = 2 error field penetration threshold in tokamaks Tvůrce(i) Logan, N. C. (US)
Park, J. K. (US)
Hu, Q. (US)
Paz-Soldan, C. (US)
Markovič, Tomáš (UFP-V) RID
Wang, H. (CN)
In, Y. (KR)
Piron, L. (GB)
Piovesan, P. (IT)
Myers, C. E. (US)
Maraschek, M. (DE)
Wolfe, S. M. (US)
Strait, E. (US)
Munaretto, S. (US)Celkový počet autorů 14 Číslo článku 086010 Zdroj.dok. Nuclear Fusion. - : Institute of Physics Publishing - ISSN 0029-5515
Roč. 60, č. 8 (2020)Poč.str. 15 s. Jazyk dok. eng - angličtina Země vyd. AT - Rakousko Klíč. slova error field correction ; iter ; locked modes ; 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 8D15001 GA MŠMT - Ministerstvo školství, mládeže a tělovýchovy LM2015045 GA MŠMT - Ministerstvo školství, mládeže a tělovýchovy EF16_019/0000768 GA MŠMT - Ministerstvo školství, mládeže a tělovýchovy Způsob publikování Omezený přístup Institucionální podpora UFP-V - RVO:61389021 UT WOS 000553758500001 EID SCOPUS 85086570581 DOI 10.1088/1741-4326/ab94f8 Anotace This paper presents a multi-machine, multi-parameter scaling law for the n = 2 core resonant error field threshold that leads to field penetration, locked modes, and disruptions. Here, n is the toroidal harmonic of the non-axisymmetric error field (EF). While density scalings have been reported by individual tokamaks in the past, this work performs a regression across a comprehensive range of densities, toroidal fields, and pressures accessible across three devices using a common metric to quantify the EF in each device. The metric used is the amount of overlap between an EF and the spectrum that drives the largest linear ideal MHD resonance, known as the „dominant mode overlap”. This metric, which takes into account both the external field and plasma response, is scaled against experimental parameters known to be important for the inner layer physics. These scalings validate non-linear MHD simulation scalings, which are used to elucidate the dominant inner layer physics. Both experiments and simulations show that core penetration thresholds for EFs with toroidal mode number n = 2 are of the same order as the n = 1 thresholds that are considered most dangerous on current devices. Both n = 1 and n = 2 thresholds scale to values within the ITER design tolerances, but data from additional devices with a range of sizes are needed in order to increase confidence in quantitative extrapolations of n = 2 thresholds to ITER. 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/ab94f8
Počet záznamů: 1