Quasi-linear toroidal simulations of resonant magnetic perturbations in eight ITER H-mode scenarios

Li, L.; Liu, Y. Q.; Loarte, A.; Pinches, S. D.; Polevoi, A.; Becoulet, M.; Huijsmans, G. T. A.; Zhong, F. C.

doi:10.1088/1741-4326/ac6c3a

Quasi-linear toroidal simulations of resonant magnetic perturbations in eight ITER H-mode scenarios

Journal Article · 13 July 2022 · Nuclear Fusion

DOI:https://doi.org/10.1088/1741-4326/ac6c3a· OSTI ID:1979416

Li, L.; ; ; ; Polevoi, A.; Becoulet, M.; Huijsmans, G. T. A.;

Abstract Both linear and quasi-linear aspects of the plasma response to the resonant magnetic perturbation (RMP) field are numerically investigated for various H-mode scenarios in ITER, covering the pre-fusion power operation and the fusion power operation phases. Linear response computations for eight ITER scenarios, with varying plasma current and toroidal magnetic field, reveal that the best coil current phasing for controlling the type-I edge localized modes (ELMs) scales roughly linearly with the edge safety factor. The coil phasing is defined as the relative toroidal phase of the coil currents between different rows, for a given toroidal harmonic. Quasi-linear initial value simulation, which is the focus of the present study, shows that application of then= 3 (nis the toroidal mode number) RMP field has a minimum side effect on the plasma core momentum confinement but potentially a large effect on the global particle transport. Generally, the RMP field with the best (worst) coil phasing for ELM control produces the strongest (weakest) effect on the plasma edge flow and the overall density. This robustly holds for all eight ITER scenarios. Consequently, in order to minimize the RMP induced side effects while achieving ELM control (suppression) in ITER, a compromise is necessary in choosing the coil current configuration.

Research Organization:: General Atomics, San Diego, CA (United States)

Sponsoring Organization:: USDOE Office of Science (SC)

DOE Contract Number:: FG02-95ER54309

OSTI ID:: 1979416

Journal Information:: Nuclear Fusion, Vol. 62, Issue 9; ISSN 0029-5515

Publisher:: IOP Science

Country of Publication:: United States

Language:: English

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