Test of the ITER-like resonant magnetic perturbation configurations for edge-localized mode crash suppression on KSTAR

In, Yongkyoon; Loarte, A.; Lee, H. H.; Kim, K.; Jeon, Y. M.; Park, J. -K.; Ahn, J. -W.; Park, G. Y.; Kim, M.; Park, H.

doi:10.1088/1741-4326/ab4631

Title: Test of the ITER-like resonant magnetic perturbation configurations for edge-localized mode crash suppression on KSTAR

Journal Article · Wed Oct 23 00:00:00 EDT 2019 · Nuclear Fusion

DOI:https://doi.org/10.1088/1741-4326/ab4631· OSTI ID:1651118

^[1]; Loarte, A. ^[2]; Lee, H. H. ^[3]; Kim, K. ^[3]; Jeon, Y. M. ^[3]; Park, J. -K. ^[4]; Ahn, J. -W. ^[5]; Park, G. Y. ^[3];

^[3]; Park, H. ^[1]

Ulsan National Institute of Science and Technology, Ulsan (Korea, Republic of); National Fusion Research Institute, Daejeon (Korea, Republic of)
ITER Organization, St. Paul Lez Durance (France)
National Fusion Research Institute, Daejeon (Korea, Republic of)
Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States)
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)

KSTAR has demonstrated divertor heat flux broadening during edge-localized-mode (ELM)-crash-suppression using ITER-like 3-row resonant magnetic perturbation (RMP) for the first time. To address a couple of critical issues in ITER RMP, robust ELM-crash-suppression methodology has been explored at low q95 and established in KSTAR using low-nRMPs. Taking full advantage of the ITER-like 3-row in-vessel control coils (IVCC) in KSTAR, a set of intentionally misaligned RMP configurations (IMC) was tested to investigate whether or not IMC could be compatible with ELM-crash-suppression, while minimizing electromagnetic loads on RMP coils. As a result, the ITER-like 3-row IMCs were found not only to have been compatible with the ELM-crash-suppression, but also to have broadened the divertor heat fluxesin the vicinity of the outer strike point. In comparison, the 2-row RMPs have rarely affected the near scrape-off-layer (SOL) heat flux despite slightly broadened profile change in the far-SOL. Since the divertor heat flux broadening reflects the dispersal of the peaked near-SOL heat flux, the experimental outcome is quite favorable to the ITER choice of 3-rows, instead of 2-rows. Nonetheless, since the IMC-driven broadening observed in the attached plasmas in KSTAR might appear substantially different in the partially detached plasmas in ITER, additional investigation has been conducted to see if RMP-driven, ELM-crash-suppression could be compatible with detached plasmas. Although no detached plasmas have been identified with ELM-crash-suppression yet, significantly reduced divertor heat flux was confirmed in high density, ELM-crash-suppressed plasmas at q₉₅=3.4using n=2 RMPs. These new findings elevate the confidence level about the ITER RMP system, while the remaining uncertainties need to be further clarified using the 3-row IVCCs in KSTAR. As long as mode-locking percussion is minimized along with a quick recovery of wall conditions, the access to the targeted q95(~ 3) for ITER is foreseen to be feasible in KSTAR

View Accepted Manuscript (DOE)

Cite

Export

Save

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

Sponsoring Organization:: USDOE

Grant/Contract Number:: AC02-09CH11466

OSTI ID:: 1651118

Journal Information:: Nuclear Fusion, Vol. 59, Issue 12; ISSN 0029-5515

Publisher:: IOP ScienceCopyright Statement

Country of Publication:: United States

Language:: English

Citation Metrics:

Cited by: 12 works

Citation information provided by
Web of Science

References (23)

Computation of three-dimensional tokamak and spherical torus equilibria Park, Jong-kyu; Boozer, Allen H.; Glasser, Alan H. Physics of Plasmas, Vol. 14, Issue 5 https://doi.org/10.1063/1.2732170	journal	May 2007
Effect of magnetic perturbations for ELM control on divertor power loads, detachment and consequences of field penetration in ASDEX Upgrade Faitsch, M.; Sieglin, B.; Brida, D. Plasma Physics and Controlled Fusion, Vol. 61, Issue 1 https://doi.org/10.1088/1361-6587/aae2d2	journal	November 2018
Suppression of Edge Localized Modes in High-Confinement KSTAR Plasmas by Nonaxisymmetric Magnetic Perturbations Jeon, Y. M.; Park, J. -K.; Yoon, S. W. Physical Review Letters, Vol. 109, Issue 3 https://doi.org/10.1103/PhysRevLett.109.035004	journal	July 2012
Neoclassical islands, -limits, error fields and ELMs in reactor scale tokamaks Perkins, F. W.; Bondeson, A.; Buttery, R. J. Nuclear Fusion, Vol. 39, Issue 11Y https://doi.org/10.1088/0029-5515/39/11Y/352	journal	November 1999
Overview of the results on divertor heat loads in RMP controlled H-mode plasmas on DIII-D Jakubowski, M. W.; Evans, T. E.; Fenstermacher, M. E. Nuclear Fusion, Vol. 49, Issue 9 https://doi.org/10.1088/0029-5515/49/9/095013	journal	August 2009
Electric Probe Measurements at Edge Region During H-Mode Discharges in KSTAR Bak, J. G.; Oh, Y. S.; Kim, H. S. Contributions to Plasma Physics, Vol. 53, Issue 1 https://doi.org/10.1002/ctpp.201310012	journal	January 2013
Dynamic divertor control using resonant mixed toroidal harmonic magnetic fields during ELM suppression in DIII-D Jia, M.; Sun, Y.; Paz-Soldan, C. Physics of Plasmas, Vol. 25, Issue 5 https://doi.org/10.1063/1.5019777	journal	May 2018
Study on the heat flux reconstruction with the infrared thermography for the divertor target plates in the KSTAR tokamak Kang, C. S.; Lee, H. H.; Oh, S. Review of Scientific Instruments, Vol. 87, Issue 8 https://doi.org/10.1063/1.4961030	journal	August 2016
First Observation of Edge Localized Modes Mitigation with Resonant and Nonresonant Magnetic Perturbations in ASDEX Upgrade Suttrop, W.; Eich, T.; Fuchs, J. C. Physical Review Letters, Vol. 106, Issue 22 https://doi.org/10.1103/PhysRevLett.106.225004	journal	June 2011
Active Control of Type-I Edge-Localized Modes with $n = 1$ Perturbation Fields in the JET Tokamak Liang, Y.; Koslowski, H. R.; Thomas, P. R. Physical Review Letters, Vol. 98, Issue 26 https://doi.org/10.1103/PhysRevLett.98.265004	journal	June 2007
Mechanism of Edge Localized Mode Mitigation by Resonant Magnetic Perturbations Bécoulet, M.; Orain, F.; Huijsmans, G. T. A. Physical Review Letters, Vol. 113, Issue 11 https://doi.org/10.1103/PhysRevLett.113.115001	journal	September 2014
Study of in-vessel nonaxisymmetric ELM suppression coil concepts for ITER Schaffer, M. J.; Menard, J. E.; Aldan, M. P. Nuclear Fusion, Vol. 48, Issue 2 https://doi.org/10.1088/0029-5515/48/2/024004	journal	January 2008
Analysis for shaping the ITER first wall Stangeby, P. C.; Mitteau, R. Journal of Nuclear Materials, Vol. 390-391 https://doi.org/10.1016/j.jnucmat.2009.01.249	journal	June 2009
Modeling of divertor particle and heat loads during application of resonant magnetic perturbation fields for ELM control in ITER Schmitz, O.; Becoulet, M.; Cahyna, P. Journal of Nuclear Materials, Vol. 438 https://doi.org/10.1016/j.jnucmat.2013.01.025	journal	July 2013
Stabilization of EMC3-EIRENE for detachment conditions and comparison to SOLPS-ITER Frerichs, H.; Bonnin, X.; Feng, Y. Nuclear Materials and Energy, Vol. 18 https://doi.org/10.1016/j.nme.2018.11.022	journal	January 2019
Understanding edge-localized mode mitigation by resonant magnetic perturbations on MAST Kirk, A.; Chapman, I. T.; Liu, Yueqiang Nuclear Fusion, Vol. 53, Issue 4 https://doi.org/10.1088/0029-5515/53/4/043007	journal	March 2013
Suppression of type-I ELMs using a single toroidal row of magnetic field perturbation coils in DIII-D Fenstermacher, M. E.; Evans, T. E.; Osborne, T. H. Nuclear Fusion, Vol. 48, Issue 12 https://doi.org/10.1088/0029-5515/48/12/122001	journal	October 2008
Comparison of divertor heat flux splitting by 3D fields with field line tracing simulation in KSTAR Kim, Kimin; Ahn, J. -W.; Lee, H. H. Physics of Plasmas, Vol. 24, Issue 5 https://doi.org/10.1063/1.4982746	journal	May 2017
Suppression of Large Edge-Localized Modes in High-Confinement DIII-D Plasmas with a Stochastic Magnetic Boundary Evans, T. E.; Moyer, R. A.; Thomas, P. R. Physical Review Letters, Vol. 92, Issue 23 https://doi.org/10.1103/PhysRevLett.92.235003	journal	June 2004
3D edge transport analysis of ITER start-up configuration for limiter power load assessment Kobayashi, M.; Feng, Y.; Loarte, A. Nuclear Fusion, Vol. 47, Issue 2 https://doi.org/10.1088/0029-5515/47/2/001	journal	January 2007
3D field phase-space control in tokamak plasmas Park, Jong-Kyu; Jeon, YoungMu; In, Yongkyoon Nature Physics, Vol. 14, Issue 12 https://doi.org/10.1038/s41567-018-0268-8	journal	September 2018
Heat flux pattern in detached L-modes and ELM mitigated H-modes with rotating magnetic perturbations in ASDEX Upgrade Brida, D.; Lunt, T.; Wischmeier, M. Nuclear Fusion, Vol. 57, Issue 11 https://doi.org/10.1088/1741-4326/aa78b9	journal	August 2017
Marfe: an edge plasma phenomenon Lipschultz, B.; LaBombard, B.; Marmar, E. S. Nuclear Fusion, Vol. 24, Issue 8 https://doi.org/10.1088/0029-5515/24/8/002	journal	August 1984

Similar Records

Toward holistic understanding of the ITER-like resonant magnetic perturbation (RMP) ELM control on KSTAR

Journal Article · Tue Apr 05 00:00:00 EDT 2022 · Nuclear Fusion · OSTI ID:1651118

In, Yongkyoon; Lee, H. H.; Park, G. Y.; +8 more

Enhanced understanding of non-axisymmetric intrinsic and controlled field impacts in tokamaks

Journal Article · Thu Aug 24 00:00:00 EDT 2017 · Nuclear Fusion · OSTI ID:1651118

In, Y.; Park, J. -K.; Jeon, Y. M.; +10 more

Overview of recent progress in 3D field physics in KSTAR

Journal Article · Mon Feb 07 00:00:00 EST 2022 · Journal of the Korean Physical Society · OSTI ID:1651118

Park, Gunyoung; In, Yongkyoon; Park, Jong-Kyu; +15 more

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY

Title: Test of the ITER-like resonant magnetic perturbation configurations for edge-localized mode crash suppression on KSTAR

Citation Formats

References (23)

Similar Records

Related Subjects