Pedestal Bifurcation and Resonant Field Penetration at the Threshold of Edge-Localized Mode Suppression in the DIII-D Tokamak

Nazikian, R.; Paz-Soldan, C.; Callen, J. D.; deGrassie, J. S.; Eldon, D.; Evans, T. E.; Ferraro, N. M.; Grierson, B. A.; Groebner, R. J.; Haskey, S. R.; Hegna, C. C.; King, J. D.; Logan, N. C.; McKee, G. R.; Moyer, R. A.; Okabayashi, M.; Orlov, D. M.; Osborne, T. H.; Park, J-K.; Rhodes, T. L.; Shafer, M. W.; Snyder, P. B.; Solomon, W. M.; Strait, E. J.; Wade, M. R.

doi:10.1103/PhysRevLett.114.105002

Title: Pedestal Bifurcation and Resonant Field Penetration at the Threshold of Edge-Localized Mode Suppression in the DIII-D Tokamak

Journal Article · Thu Mar 12 00:00:00 EDT 2015 · Physical Review Letters

DOI:https://doi.org/10.1103/PhysRevLett.114.105002· OSTI ID:1295123

Nazikian, R. ^[1]; Paz-Soldan, C. ^[2]; Callen, J. D. ^[3]; deGrassie, J. S. ^[2]; Eldon, D. ^[4]; Evans, T. E. ^[2]; Ferraro, N. M. ^[2]; Grierson, B. A. ^[1]; Groebner, R. J. ^[2]; Haskey, S. R. ^[5]; Hegna, C. C. ^[3]; King, J. D. ^[2]; Logan, N. C. ^[1]; McKee, G. R. ^[3]; Moyer, R. A. ^[4]; Okabayashi, M. ^[1]; Orlov, D. M. ^[4]; Osborne, T. H. ^[2]; Park, J-K. ^[1]; Rhodes, T. L. ^[6] more »

Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States)
General Atomics, San Diego, CA (United States)
Univ. of Wisconsin, Madison, WI (United States)
Univ. of California, San Diego, CA (United States)
Australian National Univ., Canberra, ACT (Australia). Plasma Research Lab.
Univ. of California, Los Angeles, CA (United States)
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)

Rapid bifurcations in the plasma response to slowly varying n=2 magnetic fields are observed as the plasma transitions into and out of edge localized mode (ELM) suppression. The rapid transition to ELM suppression is characterized by an increase in the toroidal rotation and a reduction in the electron pressure gradient at the top of the pedestal which reduces the perpendicular electron flow to near zero. These events occur simultaneously with an increase in the inner wall magnetic response. These observations are consistent strong resonant field penetration of n=2 fields at the onset of ELM suppression, based on extended MHD simulations using measured plasma profiles. Spontaneous transitions into (and out of) ELM suppression with a static applied n=2 field indicate competing mechanisms of screening and penetration of resonant fields near threshold conditions. Magnetic measurements reveal evidence for the unlocking and rotation of tearing-like structures as the plasma transitions out of ELM suppression.

View Accepted Manuscript (DOE)

View Accepted Manuscript (Publisher)

Cite

Export

Save

Research Organization:: Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States); General Atomics, San Diego, CA (United States)

Sponsoring Organization:: USDOE Office of Science (SC)

Grant/Contract Number:: AC05-00OR22725; FC02-04ER54698; AC02-09CH11466; FG02-07ER54917; FG02-89ER53296; FG02-08ER54999; FG02-08ER54984; FG02-86ER53218; FG02- 92ER54139

OSTI ID:: 1295123

Alternate ID(s):: OSTI ID: 1180277; OSTI ID: 1260730; OSTI ID: 1371744

Journal Information:: Physical Review Letters, Vol. 114, Issue 10; ISSN 0031-9007

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

Citation Metrics:

Cited by: 121 works

Citation information provided by
Web of Science

References (24)

Resonant magnetic perturbation experiments on MAST using external and internal coils for ELM control Kirk, A.; Nardon, E.; Akers, R. Nuclear Fusion, Vol. 50, Issue 3 https://doi.org/10.1088/0029-5515/50/3/034008	journal	February 2010
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
Mitigation of type-I ELMs with n = 2 fields on JET with ITER-like wall Liang, Y.; Lomas, P.; Nunes, I. Nuclear Fusion, Vol. 53, Issue 7 https://doi.org/10.1088/0029-5515/53/7/073036	journal	June 2013
Effect of resonant magnetic perturbations on secondary structures in drift-wave turbulence Leconte, M.; Diamond, P. H. Physics of Plasmas, Vol. 18, Issue 8 https://doi.org/10.1063/1.3610547	journal	August 2011
Initial results of the high resolution edge Thomson scattering upgrade at DIII-D Eldon, D.; Bray, B. D.; Deterly, T. M. Review of Scientific Instruments, Vol. 83, Issue 10 https://doi.org/10.1063/1.4738656	journal	October 2012
Effect of resonant magnetic perturbations on COMPASS-C tokamak discharges Hender, T. C.; Fitzpatrick, R.; Morris, A. W. Nuclear Fusion, Vol. 32, Issue 12 https://doi.org/10.1088/0029-5515/32/12/I02	journal	December 1992
Progress on the application of ELM control schemes to ITER scenarios from the non-active phase to DT operation Loarte, A.; Huijsmans, G.; Futatani, S. Nuclear Fusion, Vol. 54, Issue 3 https://doi.org/10.1088/0029-5515/54/3/033007	journal	February 2014
Sustained suppression of type-I edge-localized modes with dominantly n = 2 magnetic fields in DIII-D Lanctot, M. J.; Buttery, R. J.; de Grassie, J. S. Nuclear Fusion, Vol. 53, Issue 8 https://doi.org/10.1088/0029-5515/53/8/083019	journal	July 2013
Calculations of two-fluid linear response to non-axisymmetric fields in tokamaks Ferraro, N. M. Physics of Plasmas, Vol. 19, Issue 5 https://doi.org/10.1063/1.3694657	journal	May 2012
An upgrade of the magnetic diagnostic system of the DIII-D tokamak for non-axisymmetric measurements King, J. D.; Strait, E. J.; Boivin, R. L. Review of Scientific Instruments, Vol. 85, Issue 8 https://doi.org/10.1063/1.4891817	journal	August 2014
Advances in the physics understanding of ELM suppression using resonant magnetic perturbations in DIII-D Wade, M. R.; Nazikian, R.; deGrassie, J. S. Nuclear Fusion, Vol. 55, Issue 2 https://doi.org/10.1088/0029-5515/55/2/023002	journal	January 2015
Progress in quantifying the edge physics of the H mode regime in DIII-D Groebner, R. J.; Baker, D. R.; Burrell, K. H. Nuclear Fusion, Vol. 41, Issue 12 https://doi.org/10.1088/0029-5515/41/12/306	journal	December 2001
Increase of turbulence and transport with resonant magnetic perturbations in ELM-suppressed plasmas on DIII-D McKee, G. R.; Yan, Z.; Holland, C. Nuclear Fusion, Vol. 53, Issue 11 https://doi.org/10.1088/0029-5515/53/11/113011	journal	September 2013
The EPED pedestal model and edge localized mode-suppressed regimes: Studies of quiescent H-mode and development of a model for edge localized mode suppression via resonant magnetic perturbations Snyder, P. B.; Osborne, T. H.; Burrell, K. H. Physics of Plasmas, Vol. 19, Issue 5 https://doi.org/10.1063/1.3699623	journal	May 2012
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
Linear ideal MHD predictions for n = 2 non-axisymmetric magnetic perturbations on DIII-D Haskey, S. R.; Lanctot, M. J.; Liu, Y. Q. Plasma Physics and Controlled Fusion, Vol. 56, Issue 3 https://doi.org/10.1088/0741-3335/56/3/035005	journal	February 2014
Interaction of tearing modes with external structures in cylindrical geometry (plasma) Fitzpatrick, R. Nuclear Fusion, Vol. 33, Issue 7 https://doi.org/10.1088/0029-5515/33/7/I08	journal	July 1993
Controlling tokamak geometry with three-dimensional magnetic perturbations Bird, T. M.; Hegna, C. C. Physics of Plasmas, Vol. 21, Issue 10 https://doi.org/10.1063/1.4898064	journal	October 2014
Magnetic-flutter-induced pedestal plasma transport Callen, J. D.; Hegna, C. C.; Cole, A. J. Nuclear Fusion, Vol. 53, Issue 11 https://doi.org/10.1088/0029-5515/53/11/113015	journal	September 2013
Shielding of resonant magnetic perturbations in the long mean-free path regime Waelbroeck, F. L. Physics of Plasmas, Vol. 10, Issue 10 https://doi.org/10.1063/1.1607324	journal	October 2003
A novel, multichannel, comb-frequency Doppler backscatter system Peebles, W. A.; Rhodes, T. L.; Hillesheim, J. C. Review of Scientific Instruments, Vol. 81, Issue 10 https://doi.org/10.1063/1.3464266	journal	October 2010
Edge stability and transport control with resonant magnetic perturbations in collisionless tokamak plasmas Evans, Todd E.; Moyer, Richard A.; Burrell, Keith H. Nature Physics, Vol. 2, Issue 6 https://doi.org/10.1038/nphys312	journal	May 2006
Three-Dimensional Instability of Magnetic Islands Bondeson, A. Physical Review Letters, Vol. 51, Issue 18 https://doi.org/10.1103/PhysRevLett.51.1668	journal	October 1983
3D vacuum magnetic field modelling of the ITER ELM control coil during standard operating scenarios Evans, T. E.; Orlov, D. M.; Wingen, A. Nuclear Fusion, Vol. 53, Issue 9 https://doi.org/10.1088/0029-5515/53/9/093029	journal	August 2013

Cited By (43)

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
Experimental tests of linear and nonlinear three-dimensional equilibrium models in DIII-D King, J. D.; Strait, E. J.; Lazerson, S. A. Physics of Plasmas, Vol. 22, Issue 7 https://doi.org/10.1063/1.4923017	journal	July 2015
Effect of large magnetic islands on screening of external magnetic perturbation fields at slow plasma flow Li, L.; Liu, Y. Q.; Huang, X. Physics of Plasmas, Vol. 24, Issue 2 https://doi.org/10.1063/1.4976987	journal	February 2017
Comparative investigation of ELM control based on toroidal modelling of plasma response to RMP fields Liu, Yueqiang; Kirk, A.; Li, Li Physics of Plasmas, Vol. 24, Issue 5 https://doi.org/10.1063/1.4978884	journal	May 2017
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
Predict-first experimental analysis using automated and integrated magnetohydrodynamic modeling Lyons, B. C.; Paz-Soldan, C.; Meneghini, O. Physics of Plasmas, Vol. 25, Issue 5 https://doi.org/10.1063/1.5025838	journal	May 2018
Modal analysis of the full poloidal structure of the plasma response to n = 2 magnetic perturbations Munaretto, S.; Strait, E. J.; Haskey, S. R. Physics of Plasmas, Vol. 25, Issue 7 https://doi.org/10.1063/1.5029381	journal	July 2018
Mode penetration induced by transient magnetic perturbations Beidler, M. T.; Callen, J. D.; Hegna, C. C. Physics of Plasmas, Vol. 25, Issue 8 https://doi.org/10.1063/1.5046076	journal	August 2018
Two-fluid nonlinear theory of response of tokamak plasma to resonant magnetic perturbation Fitzpatrick, Richard Physics of Plasmas, Vol. 25, Issue 11 https://doi.org/10.1063/1.5053804	journal	November 2018
Main-ion intrinsic toroidal rotation across the ITG/TEM boundary in DIII-D discharges during ohmic and electron cyclotron heating Grierson, B. A.; Chrystal, C.; Haskey, S. R. Physics of Plasmas, Vol. 26, Issue 4 https://doi.org/10.1063/1.5090505	journal	April 2019
Non-linear modeling of the threshold between ELM mitigation and ELM suppression by resonant magnetic perturbations in ASDEX upgrade Orain, F.; Hoelzl, M.; Mink, F. Physics of Plasmas, Vol. 26, Issue 4 https://doi.org/10.1063/1.5091843	journal	April 2019
Global gyrokinetic simulation of microturbulence with kinetic electrons in the presence of magnetic island in tokamak Fang, K. S.; Lin, Z. Physics of Plasmas, Vol. 26, Issue 5 https://doi.org/10.1063/1.5096962	journal	May 2019
Kinetic particle simulations in a global toroidal geometry De, S.; Singh, T.; Kuley, A. Physics of Plasmas, Vol. 26, Issue 8 https://doi.org/10.1063/1.5108684	journal	August 2019
The density dependence of edge-localized-mode suppression and pump-out by resonant magnetic perturbations in the DIII-D tokamak Hu, Q. M.; Nazikian, R.; Grierson, B. A. Physics of Plasmas, Vol. 26, Issue 12 https://doi.org/10.1063/1.5134767	journal	December 2019
Newly uncovered physics of MHD instabilities using 2-D electron cyclotron emission imaging system in toroidal plasmas Park, Hyeon K. Advances in Physics: X, Vol. 4, Issue 1 https://doi.org/10.1080/23746149.2019.1633956	journal	January 2019
Equilibrium drives of the low and high field side n = 2 plasma response and impact on global confinement Paz-Soldan, C.; Logan, N. C.; Haskey, S. R. Nuclear Fusion, Vol. 56, Issue 5 https://doi.org/10.1088/0029-5515/56/5/056001	journal	April 2016
Non-linear modeling of the plasma response to RMPs in ASDEX Upgrade Orain, F.; Hölzl, M.; Viezzer, E. Nuclear Fusion, Vol. 57, Issue 2 https://doi.org/10.1088/0029-5515/57/2/022013	journal	September 2016
Effect of rotation zero-crossing on single-fluid plasma response to three-dimensional magnetic perturbations Lyons, B. C.; Ferraro, N. M.; Paz-Soldan, C. Plasma Physics and Controlled Fusion, Vol. 59, Issue 4 https://doi.org/10.1088/1361-6587/aa5860	journal	February 2017
Characterisation of the fast-ion edge resonant transport layer induced by 3D perturbative fields in the ASDEX Upgrade tokamak through full orbit simulations Sanchis, L.; Garcia-Munoz, M.; Snicker, A. Plasma Physics and Controlled Fusion, Vol. 61, Issue 1 https://doi.org/10.1088/1361-6587/aaef61	journal	November 2018
Numerical survey of predicted peeling response in edge localised mode mitigated and suppressed phases on ASDEX upgrade Ryan, D. A.; Dunne, M.; Kirk, A. Plasma Physics and Controlled Fusion, Vol. 61, Issue 9 https://doi.org/10.1088/1361-6587/ab32fa	journal	August 2019
Effects of magnetic islands on resonant field penetration and toroidal torques at slow plasma flow Li, L.; Liu, Y. Q.; Wang, N. Nuclear Fusion, Vol. 57, Issue 12 https://doi.org/10.1088/1741-4326/aa854e	journal	September 2017
Magnetic polarization measurements of the multi-modal plasma response to 3D fields in the EAST tokamak Logan, N. C.; Cui, L.; Wang, H. Nuclear Fusion, Vol. 58, Issue 7 https://doi.org/10.1088/1741-4326/aac129	journal	May 2018
Toroidal plasma response based ELM control coil design for EU DEMO Zhou, Lina; Liu, Yueqiang; Wenninger, Ronald Nuclear Fusion, Vol. 58, Issue 7 https://doi.org/10.1088/1741-4326/aac602	journal	June 2018
Distinct stages of radio frequency emission at the onset of pedestal collapse in KSTAR H-mode plasmas Kim, M. H.; Thatipamula, S. G.; Lee, J. E. Nuclear Fusion, Vol. 58, Issue 9 https://doi.org/10.1088/1741-4326/aad05a	journal	July 2018
Grassy-ELM regime with edge resonant magnetic perturbations in fully noninductive plasmas in the DIII-D tokamak Nazikian, R.; Petty, C. C.; Bortolon, A. Nuclear Fusion, Vol. 58, Issue 10 https://doi.org/10.1088/1741-4326/aad20d	journal	July 2018
Plasma response to rotating resonant magnetic perturbations with a locked mode in the J-TEXT tokamak Wang, Nengchao; Rao, Bo; Hu, Qiming Nuclear Fusion, Vol. 59, Issue 2 https://doi.org/10.1088/1741-4326/aaf4a3	journal	January 2019
Edge localized mode suppression and plasma response using mixed toroidal harmonic resonant magnetic perturbations in DIII-D Gu, S.; Sun, Y.; Paz-Soldan, C. Nuclear Fusion, Vol. 59, Issue 2 https://doi.org/10.1088/1741-4326/aaf5a3	journal	January 2019
Effects of RMP-induced changes of radial electric fields on microturbulence in DIII-D pedestal top Taimourzadeh, S.; Shi, L.; Lin, Z. Nuclear Fusion, Vol. 59, Issue 4 https://doi.org/10.1088/1741-4326/aafe3a	journal	February 2019
DIII-D research towards establishing the scientific basis for future fusion reactors Petty, C. C. Nuclear Fusion, Vol. 59, Issue 11 https://doi.org/10.1088/1741-4326/ab024a	journal	June 2019
The effect of plasma shape and neutral beam mix on the rotation threshold for RMP-ELM suppression Paz-Soldan, C.; Nazikian, R.; Cui, L. Nuclear Fusion, Vol. 59, Issue 5 https://doi.org/10.1088/1741-4326/ab04c0	journal	March 2019
Direct evidence of E × B flow changes at the onset of resonant magnetic perturbation-driven edge-localized mode crash suppression Lee, Jaehyun; Jeon, Y. M.; In, Y. Nuclear Fusion, Vol. 59, Issue 6 https://doi.org/10.1088/1741-4326/ab167a	journal	May 2019
Gyrokinetic analysis and simulation of pedestals to identify the culprits for energy losses using ‘fingerprints’ Kotschenreuther, M.; Liu, X.; Hatch, D. R. Nuclear Fusion, Vol. 59, Issue 9 https://doi.org/10.1088/1741-4326/ab1fa2	journal	July 2019
Overview of KSTAR research progress and future plans toward ITER and K-DEMO Park, H. K.; Choi, M. J.; Hong, S. H. Nuclear Fusion, Vol. 59, Issue 11 https://doi.org/10.1088/1741-4326/ab20e2	journal	July 2019
Resistive versus ideal plasma response to RMP fields in DIII-D: roles of q ₉₅ and X-point geometry Yang, Xu; Liu, Yueqiang; Paz-Soldan, Carlos Nuclear Fusion, Vol. 59, Issue 8 https://doi.org/10.1088/1741-4326/ab20f9	journal	June 2019
Optimizing multi-modal, non-axisymmetric plasma response metrics with additional coil rows on DIII-D Weisberg, D. B.; Paz-Soldan, C.; Liu, Y. Q. Nuclear Fusion, Vol. 59, Issue 8 https://doi.org/10.1088/1741-4326/ab265e	journal	July 2019
Modeling 3D plasma boundary corrugation and tailoring toroidal torque profiles with resonant magnetic perturbation fields in ITER Li, L.; Liu, Y. Q.; Loarte, A. Nuclear Fusion, Vol. 59, Issue 9 https://doi.org/10.1088/1741-4326/ab2bca	journal	August 2019
Nonlinear modeling of the effect of n = 2 resonant magnetic field perturbation on peeling-ballooning modes in KSTAR Kim, S. K.; Pamela, S.; Kwon, O. Nuclear Fusion, Vol. 60, Issue 2 https://doi.org/10.1088/1741-4326/ab5cf0	journal	January 2020
Gyrokinetic simulations of nonlinear interactions between magnetic islands and microturbulence Fang, Kaisheng; Bao, Jian; Lin, Zhihong Plasma Science and Technology, Vol. 21, Issue 11 https://doi.org/10.1088/2058-6272/ab3c83	journal	September 2019
Observation of a Multimode Plasma Response and its Relationship to Density Pumpout and Edge-Localized Mode Suppression Paz-Soldan, C.; Nazikian, R.; Haskey, S. R. Physical Review Letters, Vol. 114, Issue 10 https://doi.org/10.1103/physrevlett.114.105001	journal	March 2015
Nonlinear Transition from Mitigation to Suppression of the Edge Localized Mode with Resonant Magnetic Perturbations in the EAST Tokamak Sun, Y.; Liang, Y.; Liu, Y. Q. Physical Review Letters, Vol. 117, Issue 11 https://doi.org/10.1103/physrevlett.117.115001	journal	September 2016
Distinct stages of radio frequency emission at the onset of pedestal collapse in KSTAR H-mode plasmas Kim, Minho; Thatipamula, Shekar G.; Lee, Jieun arXiv https://doi.org/10.48550/arxiv.1803.09376	text	January 2018
Two-Fluid Nonlinear Theory of Response of Tokamak Plasma to Resonant Magnetic Perturbation Fitzpatrick, Richard arXiv https://doi.org/10.48550/arxiv.1808.04482	text	January 2018
Gyrokinetic analysis and simulation of pedestals, to identify the culprits for energy losses using fingerprints Kotschenreuther, M.; Liu, X.; Hatch, D. R. arXiv https://doi.org/10.48550/arxiv.1903.09994	text	January 2019

Similar Records

Advances in the physics understanding of ELM suppression using resonant magnetic perturbations in DIII-D

Journal Article · Wed Jan 14 00:00:00 EST 2015 · Nuclear Fusion · OSTI ID:1295123

Wade, M. R.; Nazikian, R.; deGrassie, John S.; +17 more

Validation of the model for ELM suppression with 3D magnetic fields using low torque ITER baseline scenario discharges in DIII-D

Journal Article · Mon Sep 18 00:00:00 EDT 2017 · Physics of Plasmas · OSTI ID:1295123

Moyer, Richard A.; Paz-Soldan, Carlos; Nazikian, Raffi; +21 more

Bifurcation of quiescent H-mode to a wide pedestal regime in DIII-D and advances in the understanding of edge harmonic oscillations

Journal Article · Wed Jun 14 00:00:00 EDT 2017 · Nuclear Fusion · OSTI ID:1295123

Chen, Xi; Burrell, K. H.; Osborne, T. H.; +12 more

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY

Title: Pedestal Bifurcation and Resonant Field Penetration at the Threshold of Edge-Localized Mode Suppression in the DIII-D Tokamak

Citation Formats

References (24)

Cited By (43)

Similar Records

Related Subjects