Heuristic predictions of RMP configurations for ELM suppression in ITER burning plasmas and their impact on divertor performance

Frerichs, H.; van Blarcum, J.; Feng, Y.; Li, L.; Liu, Y.Q.; Loarte, A.; Park, J-K.; Pitts, R.A.; Schmitz, O.; Yang, S.M.

doi:10.1088/1741-4326/ad4e47

Title: Heuristic predictions of RMP configurations for ELM suppression in ITER burning plasmas and their impact on divertor performance

Journal Article · 05 June 2024 · Nuclear Fusion

DOI: https://doi.org/10.1088/1741-4326/ad4e47 · OSTI ID:2370597

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Univ. of Wisconsin, Madison, WI (United States)
Max Planck Institute for Plasma Physics, Greifswald (Germany)
Donghua Univ., Shanghai (China)
General Atomics, San Diego, CA (United States)
ITER Organization, St. Paul Lez Durance (France)
Seoul National Univ. (Korea, Republic of)
Princeton Plasma Physics Laboratory (PPPL), Princeton, NJ (United States)

A subspace of resonant magnetic perturbation (RMP) configurations for edge localized mode (ELM) suppression is predicted for H-mode burning plasmas at 15 MA current and 5.3 T magnetic field in ITER. Perturbations to the core plasma can be reduced by a factor of 2 for equivalent edge stability proxies, while the perturbed plasma boundary geometry remains mostly resilient. The striated domain of perturbed field lines connecting from the main plasma (normalized poloidal flux ) to the divertor targets is found to be significantly larger than the expected heat load width in the absence of RMPs. This facilitates heat load spreading with peak values at an acceptable level below 10 MW m^-2 on the outer target already at moderate gas fueling and low Ne seeding for additional radiative dissipation of the 100 MW of power into the scrape-off layer (SOL). On the inner target, however, re-attachment is predicted away from the equilibrium strike point due to increased upstream heat flux, higher downstream temperature and less efficient impurity radiation.

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Research Organization:: Princeton Plasma Physics Laboratory (PPPL), Princeton, NJ (United States)

Sponsoring Organization:: USDOE; USDOE Office of Science (SC), Fusion Energy Sciences (FES)

Grant/Contract Number:: SC0020284; SC0020357; AC02-09CH11466

OSTI ID:: 2370597

Alternate ID(s):: OSTI ID: 2352523; OSTI ID: 2403058

Journal Information:: Nuclear Fusion, Vol. 64, Issue 7; ISSN 0029-5515

Publisher:: IOP ScienceCopyright Statement

Country of Publication:: United States

Language:: English

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