Numerical simulations of edge localised modes in MAST-U plasmas

S. F. Smith, S. J.P. Pamela, A. J. Thornton, D. Moulton, M. Hölzl, A. Kirk, H. R. Wilson, G. T.A. Huijsmans

Onderzoeksoutput: Hoofdstuk in Boek/Rapport/CongresprocedureConferentiebijdrageAcademicpeer review

1 Citaat (Scopus)

Samenvatting

Edge localised modes (ELMs) are magneto-hydrodynamic (MHD) instabilities that drive filamentary plasma eruptions in high confinement tokamak discharges [1]. Gaining an improved understanding of ELMs is important [2]; in future fusion reactors such as ITER, ELM heat fluxes will need to be limited to ensure durability of divertor materials [3]. A new
divertor configuration, the Super-X, will be tested on the MAST-U tokamak. The Super-X has a closed divertor designed to retain neutrals and could offer a solution for divertor heat flux control due to the increased connection length and magnetic flux expansion [4]. The effect of the new magnetic configuration on ELMs is unknown. First
simulations of ELM dynamics in MAST-U plasmas are presented using the nonlinear MHD code JOREK [5], which is being developed to establish quantitative validation against current experiments [6]. The evolution of a model MAST-U plasma has been simulated, showing filamentary structures of higher density forming in the nonlinear phase. The simulations predict energy and particle losses that are compared with data
from previous MAST experiments. A fluid neutrals model has been implemented in JOREK and will be presented, including the impact on ELM dynamics in MAST-U, considering configurations with varying divertor leg length.
Originele taal-2Engels
Titel45th EPS Conference on Plasma Physics, EPS 2018
RedacteurenC. Michaut, J. Berndt, M. Mantsinen, S. Coda, G. Lapenta, S. Weber
Plaats van productieMulhouse
UitgeverijEuropean Physical Society (EPS)
Pagina's1148-1151
Aantal pagina's4
ISBN van elektronische versie9781510868441
StatusGepubliceerd - 1 jan 2018
Evenement45th European Physical Society Conference on Plasma Physics, (EPS 2018) - Prague, Tsjechië
Duur: 2 jul 20186 jul 2018
https://eps2018.eli-beams.eu/en/

Congres

Congres45th European Physical Society Conference on Plasma Physics, (EPS 2018)
Verkorte titelEPS 2018
LandTsjechië
StadPrague
Periode2/07/186/07/18
Internet adres

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  • Citeer dit

    Smith, S. F., Pamela, S. J. P., Thornton, A. J., Moulton, D., Hölzl, M., Kirk, A., ... Huijsmans, G. T. A. (2018). Numerical simulations of edge localised modes in MAST-U plasmas. In C. Michaut, J. Berndt, M. Mantsinen, S. Coda, G. Lapenta, & S. Weber (editors), 45th EPS Conference on Plasma Physics, EPS 2018 (blz. 1148-1151). Mulhouse: European Physical Society (EPS).