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Title: Suppression of type-I ELMs with reduced RMP coil set on DIII-D

Abstract

Recent experiments on DIII-D have demonstrated that having a toroidally-monochromatic spectral content of edge-resonant magnetic perturbations (RMPs) is not a necessary condition for suppression of edge localized modes (ELMs). Robust ELM suppression has been reproducibly obtained on DIII-D during experiments in which various non-axisymmetric coil loops were turned off pseudo-randomly producing a variety of n=1 , n=2, and n=3 spectral contributions. It was demonstrated that RMP ELM suppression could be achieved with as few as 5 out of 12 internal coil loops (I-coils) on DIII-D at similar coil currents and with good plasma confinement. Linear MHD plasma response (M3DC1, IPEC, MARS) and vacuum (SURFMN, TRIP3D) modelling have been performed in order to understand the effects of the perturbation spectrum on the plasma response and ELM suppression. The results suggest that reduction of the dominant n=3 perturbation field is compensated by increased n=2 field in the plasma that may lead to RMP ELM suppression at lower levels of n=3 perturbative magnetic flux from the I-coils. In conclusion, these results provide additional confidence that ITER may be capable of RMP ELM suppression in the event of multiple internal coil failures.

Authors:
 [1];  [1];  [2];  [2];  [2];  [3];  [2];  [3];  [1];  [4];  [2];  [3];  [2];  [3];  [2];  [2];  [5]
+ Show Author Affiliations
  1. Univ. of California, San Diego, CA (United States)
  2. General Atomics, San Diego, CA (United States)
  3. Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States)
  4. Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
  5. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States); DIII-D National Fusion Facility, San Diego, CA (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Fusion Energy Sciences (FES); USDOE Office of Nuclear Energy (NE); USDOE National Nuclear Security Administration (NNSA)
OSTI Identifier:
1311248
Alternate Identifier(s):
OSTI ID: 1238386; OSTI ID: 1353064; OSTI ID: 1871406
Report Number(s):
LLNL-JRNL-834533
Journal ID: ISSN 0029-5515; AT1010101; ERAT355
Grant/Contract Number:  
AC05-00OR22725; FG02-05ER54809; FC02-04ER54698; AC01-09CH11466; AC52-07NA27344; AC02-09CH11466; AC05-06OR23100
Resource Type:
Accepted Manuscript
Journal Name:
Nuclear Fusion
Additional Journal Information:
Journal Volume: 56; Journal Issue: 3; Journal ID: ISSN 0029-5515
Publisher:
IOP Science
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; macroinstabilities; magnetic confinement; tokamaks; kinetic modes; plasma simulation

Citation Formats

Orlov, Dmitriy M., Moyer, Richard A., Evans, Todd E., Paz-Soldan, Carlos, Ferraro, Nathaniel M., Nazikian, Raffi, deGrassie, John S., Grierson, Brian A., Eldon, David, Fenstermacher, Max E., King, J. D., Logan, N. C., Lanctot, Matthew J., Maingi, R., Snyder, P. B., Strait, E. J., and Wingen, Andreas. Suppression of type-I ELMs with reduced RMP coil set on DIII-D. United States: N. p., 2016. Web. doi:10.1088/0029-5515/56/3/036020.
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Orlov, Dmitriy M., Moyer, Richard A., Evans, Todd E., Paz-Soldan, Carlos, Ferraro, Nathaniel M., Nazikian, Raffi, deGrassie, John S., Grierson, Brian A., Eldon, David, Fenstermacher, Max E., King, J. D., Logan, N. C., Lanctot, Matthew J., Maingi, R., Snyder, P. B., Strait, E. J., & Wingen, Andreas. Suppression of type-I ELMs with reduced RMP coil set on DIII-D. United States. https://doi.org/10.1088/0029-5515/56/3/036020
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Orlov, Dmitriy M., Moyer, Richard A., Evans, Todd E., Paz-Soldan, Carlos, Ferraro, Nathaniel M., Nazikian, Raffi, deGrassie, John S., Grierson, Brian A., Eldon, David, Fenstermacher, Max E., King, J. D., Logan, N. C., Lanctot, Matthew J., Maingi, R., Snyder, P. B., Strait, E. J., and Wingen, Andreas. Fri . "Suppression of type-I ELMs with reduced RMP coil set on DIII-D". United States. https://doi.org/10.1088/0029-5515/56/3/036020. https://www.osti.gov/servlets/purl/1311248.
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@article{osti_1311248,
title = {Suppression of type-I ELMs with reduced RMP coil set on DIII-D},
author = {Orlov, Dmitriy M. and Moyer, Richard A. and Evans, Todd E. and Paz-Soldan, Carlos and Ferraro, Nathaniel M. and Nazikian, Raffi and deGrassie, John S. and Grierson, Brian A. and Eldon, David and Fenstermacher, Max E. and King, J. D. and Logan, N. C. and Lanctot, Matthew J. and Maingi, R. and Snyder, P. B. and Strait, E. J. and Wingen, Andreas},
abstractNote = {Recent experiments on DIII-D have demonstrated that having a toroidally-monochromatic spectral content of edge-resonant magnetic perturbations (RMPs) is not a necessary condition for suppression of edge localized modes (ELMs). Robust ELM suppression has been reproducibly obtained on DIII-D during experiments in which various non-axisymmetric coil loops were turned off pseudo-randomly producing a variety of n=1 , n=2, and n=3 spectral contributions. It was demonstrated that RMP ELM suppression could be achieved with as few as 5 out of 12 internal coil loops (I-coils) on DIII-D at similar coil currents and with good plasma confinement. Linear MHD plasma response (M3DC1, IPEC, MARS) and vacuum (SURFMN, TRIP3D) modelling have been performed in order to understand the effects of the perturbation spectrum on the plasma response and ELM suppression. The results suggest that reduction of the dominant n=3 perturbation field is compensated by increased n=2 field in the plasma that may lead to RMP ELM suppression at lower levels of n=3 perturbative magnetic flux from the I-coils. In conclusion, these results provide additional confidence that ITER may be capable of RMP ELM suppression in the event of multiple internal coil failures.},
doi = {10.1088/0029-5515/56/3/036020},
journal = {Nuclear Fusion},
number = 3,
volume = 56,
place = {United States},
year = {Fri Feb 19 00:00:00 EST 2016},
month = {Fri Feb 19 00:00:00 EST 2016}
}
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https://doi.org/10.1088/0029-5515/56/3/036020
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Works referenced in this record:

Suppression of large edge localized modes with edge resonant magnetic fields in high confinement DIII-D plasmas
journal, June 2005

Suppression of Large Edge-Localized Modes in High-Confinement DIII-D Plasmas with a Stochastic Magnetic Boundary
journal, June 2004

Analysis of edge magnetic field line structure in ITER due to in-vessel ELM control coils
journal, September 2012

3D vacuum magnetic field modelling of the ITER ELM control coil during standard operating scenarios
journal, August 2013

Effect of island overlap on edge localized mode suppression by resonant magnetic perturbations in DIII-D
journal, May 2008

  • Fenstermacher, M. E.; Evans, T. E.; Osborne, T. H.
  • Physics of Plasmas, Vol. 15, Issue 5
  • DOI: 10.1063/1.2901064

Suppression of Edge Localized Modes in High-Confinement KSTAR Plasmas by Nonaxisymmetric Magnetic Perturbations
journal, July 2012

Resonant magnetic perturbation experiments on MAST using external and internal coils for ELM control
journal, February 2010

Active Control of Type-I Edge-Localized Modes with n = 1 Perturbation Fields in the JET Tokamak
journal, June 2007

First Observation of Edge Localized Modes Mitigation with Resonant and Nonresonant Magnetic Perturbations in ASDEX Upgrade
journal, June 2011

RMP ELM suppression in DIII-D plasmas with ITER similar shapes and collisionalities
journal, January 2008

Magnetic-flutter-induced pedestal plasma transport
journal, September 2013

Impact of plasma response on plasma displacements in DIII-D during application of external 3D perturbations
journal, May 2014

Edge stability and transport control with resonant magnetic perturbations in collisionless tokamak plasmas
journal, May 2006

  • Evans, Todd E.; Moyer, Richard A.; Burrell, Keith H.
  • Nature Physics, Vol. 2, Issue 6
  • DOI: 10.1038/nphys312

Edge localized modes and the pedestal: A model based on coupled peeling–ballooning modes
journal, May 2002

  • Snyder, P. B.; Wilson, H. R.; Ferron, J. R.
  • Physics of Plasmas, Vol. 9, Issue 5
  • DOI: 10.1063/1.1449463

Study of in-vessel nonaxisymmetric ELM suppression coil concepts for ITER
journal, January 2008

Suppression and Mitigation of Edge Localized Modes in the DIII-D Tokamak with 3D Magnetic Perturbations
journal, January 2012

Neoclassical conductivity and bootstrap current formulas for general axisymmetric equilibria and arbitrary collisionality regime
journal, July 1999

  • Sauter, O.; Angioni, C.; Lin-Liu, Y. R.
  • Physics of Plasmas, Vol. 6, Issue 7
  • DOI: 10.1063/1.873240

The spectral basis of optimal error field correction on DIII-D
journal, April 2014

Edge localized mode control with an edge resonant magnetic perturbation
journal, May 2005

  • Moyer, R. A.; Evans, T. E.; Osborne, T. H.
  • Physics of Plasmas, Vol. 12, Issue 5
  • DOI: 10.1063/1.1888705

Experimental tests of linear and nonlinear three-dimensional equilibrium models in DIII-D
journal, July 2015

  • King, J. D.; Strait, E. J.; Lazerson, S. A.
  • Physics of Plasmas, Vol. 22, Issue 7
  • DOI: 10.1063/1.4923017

The importance of matched poloidal spectra to error field correction in DIII-D
journal, July 2014

  • Paz-Soldan, C.; Lanctot, M. J.; Logan, N. C.
  • Physics of Plasmas, Vol. 21, Issue 7
  • DOI: 10.1063/1.4886795

Numerical analysis of the effects of normalized plasma pressure on RMP ELM suppression in DIII-D
journal, February 2010

Calculations of two-fluid linear response to non-axisymmetric fields in tokamaks
journal, May 2012

Modeling of stochastic magnetic flux loss from the edge of a poloidally diverted tokamak
journal, December 2002

  • Evans, T. E.; Moyer, R. A.; Monat, P.
  • Physics of Plasmas, Vol. 9, Issue 12
  • DOI: 10.1063/1.1521125

Computation of three-dimensional tokamak and spherical torus equilibria
journal, May 2007

  • Park, Jong-kyu; Boozer, Allen H.; Glasser, Alan H.
  • Physics of Plasmas, Vol. 14, Issue 5
  • DOI: 10.1063/1.2732170

Feedback stabilization of nonaxisymmetric resistive wall modes in tokamaks. I. Electromagnetic model
journal, September 2000

  • Liu, Y. Q.; Bondeson, A.; Fransson, C. M.
  • Physics of Plasmas, Vol. 7, Issue 9
  • DOI: 10.1063/1.1287744

Experimental signatures of homoclinic tangles in poloidally diverted tokamaks
journal, January 2005

Role of plasma response in displacements of the tokamak edge due to applied non-axisymmetric fields
journal, June 2013

An upgrade of the magnetic diagnostic system of the DIII-D tokamak for non-axisymmetric measurements
journal, August 2014

  • King, J. D.; Strait, E. J.; Boivin, R. L.
  • Review of Scientific Instruments, Vol. 85, Issue 8
  • DOI: 10.1063/1.4891817
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    Works referencing / citing this record:

    Dynamic divertor control using resonant mixed toroidal harmonic magnetic fields during ELM suppression in DIII-D
    journal, May 2018

    • Jia, M.; Sun, Y.; Paz-Soldan, C.
    • Physics of Plasmas, Vol. 25, Issue 5
    • DOI: 10.1063/1.5019777

    The effect of plasma shape and neutral beam mix on the rotation threshold for RMP-ELM suppression
    journal, March 2019

    Toroidal plasma response based ELM control coil design for EU DEMO
    journal, June 2018

    Predict-first experimental analysis using automated and integrated magnetohydrodynamic modeling
    journal, May 2018

    • Lyons, B. C.; Paz-Soldan, C.; Meneghini, O.
    • Physics of Plasmas, Vol. 25, Issue 5
    • DOI: 10.1063/1.5025838
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