Comparison of the numerical modelling and experimental measurements of DIII-D separatrix displacements during H-modes with resonant magnetic perturbations
Abstract
Numerical modeling of the plasma boundary position and its displacement due to external magnetic perturbations in DIII-D low-collisionality H-mode discharges is presented. The results of the vacuum model are compared to the experimental measurements for boundary displacements including Thomson scattering electron temperature Te, charge exchange recombination spectroscopy, beam emission spectroscopy, soft x-ray, and divertor Langmuir probe measurements. Magnetically perturbed discharges with toroidal mode number n=2 and n=3 are studied. It is shown that the vacuum model predictions agree well with the measurements above and below the midplane, and disagree at the outer midplane in discharges where significant kink amplification is present. Lastly, the role of the plasma response is studied using the two-fluid MHD code M3D-C1, and the results are compared to the vacuum model showing that the plasma response model underestimates the boundary displacements.
- Authors:
-
- Univ. of California San Diego, La Jolla, CA (United States)
- General Atomics, San Diego, CA (United States)
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
- Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States)
- Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
- Publication Date:
- Research Org.:
- General Atomics, San Diego, CA (United States)
- Sponsoring Org.:
- USDOE Advanced Research Projects Agency - Energy (ARPA-E)
- OSTI Identifier:
- 1351087
- Grant/Contract Number:
- FC02-04ER54698
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Nuclear Fusion
- Additional Journal Information:
- Journal Volume: 54; Journal Issue: 9; Journal ID: ISSN 0029-5515
- Publisher:
- IOP Science
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 70 PLASMA PHYSICS AND FUSION TECHNOLOGY; stochastic magnetic field lines; non-axisymmetric magnetic perturbations; tokamaks; ELM (edge localized modes); ELM control; RMP (resonant magnetic perturbation)
Citation Formats
Orlov, Dmitry M., Moyer, Richard A., Evans, Todd E., Wingen, Andreas, Buttery, Richard J., Ferraro, Nathaniel M., Grierson, Brian A., Eldon, David, Watkins, Jonathan G., and Nazikian, Raffi. Comparison of the numerical modelling and experimental measurements of DIII-D separatrix displacements during H-modes with resonant magnetic perturbations. United States: N. p., 2014.
Web. doi:10.1088/0029-5515/54/9/093008.
Orlov, Dmitry M., Moyer, Richard A., Evans, Todd E., Wingen, Andreas, Buttery, Richard J., Ferraro, Nathaniel M., Grierson, Brian A., Eldon, David, Watkins, Jonathan G., & Nazikian, Raffi. Comparison of the numerical modelling and experimental measurements of DIII-D separatrix displacements during H-modes with resonant magnetic perturbations. United States. https://doi.org/10.1088/0029-5515/54/9/093008
Orlov, Dmitry M., Moyer, Richard A., Evans, Todd E., Wingen, Andreas, Buttery, Richard J., Ferraro, Nathaniel M., Grierson, Brian A., Eldon, David, Watkins, Jonathan G., and Nazikian, Raffi. Fri .
"Comparison of the numerical modelling and experimental measurements of DIII-D separatrix displacements during H-modes with resonant magnetic perturbations". United States. https://doi.org/10.1088/0029-5515/54/9/093008. https://www.osti.gov/servlets/purl/1351087.
@article{osti_1351087,
title = {Comparison of the numerical modelling and experimental measurements of DIII-D separatrix displacements during H-modes with resonant magnetic perturbations},
author = {Orlov, Dmitry M. and Moyer, Richard A. and Evans, Todd E. and Wingen, Andreas and Buttery, Richard J. and Ferraro, Nathaniel M. and Grierson, Brian A. and Eldon, David and Watkins, Jonathan G. and Nazikian, Raffi},
abstractNote = {Numerical modeling of the plasma boundary position and its displacement due to external magnetic perturbations in DIII-D low-collisionality H-mode discharges is presented. The results of the vacuum model are compared to the experimental measurements for boundary displacements including Thomson scattering electron temperature Te, charge exchange recombination spectroscopy, beam emission spectroscopy, soft x-ray, and divertor Langmuir probe measurements. Magnetically perturbed discharges with toroidal mode number n=2 and n=3 are studied. It is shown that the vacuum model predictions agree well with the measurements above and below the midplane, and disagree at the outer midplane in discharges where significant kink amplification is present. Lastly, the role of the plasma response is studied using the two-fluid MHD code M3D-C1, and the results are compared to the vacuum model showing that the plasma response model underestimates the boundary displacements.},
doi = {10.1088/0029-5515/54/9/093008},
journal = {Nuclear Fusion},
number = 9,
volume = 54,
place = {United States},
year = {Fri Aug 15 00:00:00 EDT 2014},
month = {Fri Aug 15 00:00:00 EDT 2014}
}
Web of Science
Works referenced in this record:
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
Active Control of Type-I Edge-Localized Modes with Perturbation Fields in the JET Tokamak
journal, June 2007
- Liang, Y.; Koslowski, H. R.; Thomas, P. R.
- Physical Review Letters, Vol. 98, Issue 26
First Observation of Edge Localized Modes Mitigation with Resonant and Nonresonant Magnetic Perturbations in ASDEX Upgrade
journal, June 2011
- Suttrop, W.; Eich, T.; Fuchs, J. C.
- Physical Review Letters, Vol. 106, Issue 22
Suppression of Edge Localized Modes in High-Confinement KSTAR Plasmas by Nonaxisymmetric Magnetic Perturbations
journal, July 2012
- Jeon, Y. M.; Park, J. -K.; Yoon, S. W.
- Physical Review Letters, Vol. 109, Issue 3
Towards understanding edge localised mode mitigation by resonant magnetic perturbations in MAST
journal, May 2013
- Chapman, I. T.; Kirk, A.; Ham, C. J.
- Physics of Plasmas, Vol. 20, Issue 5
Overview of Experiments with the Dynamic Ergodic Divertor on TEXTOR
journal, September 2006
- Finken, K. H.; Abdullaev, S.; Biel, W.
- Contributions to Plasma Physics, Vol. 46, Issue 7-9
Measurement of plasma boundary displacement by n = 2 magnetic perturbations using imaging beam emission spectroscopy
journal, November 2012
- Moyer, R. A.; Van Zeeland, M. A.; Orlov, D. M.
- Nuclear Fusion, Vol. 52, Issue 12
Experimental imaging of separatrix splitting on DIII-D
journal, November 2012
- Shafer, M. W.; Unterberg, E. A.; Orlov, D. M.
- Nuclear Fusion, Vol. 52, Issue 12
Observation of Lobes near the Point in Resonant Magnetic Perturbation Experiments on MAST
journal, June 2012
- Kirk, A.; Harrison, J.; Liu, Yueqiang
- Physical Review Letters, Vol. 108, Issue 25
Footprint structures due to resonant magnetic perturbations in DIII-D
journal, April 2009
- Wingen, A.; Evans, T. E.; Spatschek, K. H.
- Physics of Plasmas, Vol. 16, Issue 4
Experimental signatures of homoclinic tangles in poloidally diverted tokamaks
journal, January 2005
- Evans, T. E.; Roeder, R. K. W.; Carter, J. A.
- Journal of Physics: Conference Series, Vol. 7
Non-linear magnetohydrodynamic modeling of plasma response to resonant magnetic perturbations
journal, October 2013
- Orain, F.; Bécoulet, M.; Dif-Pradalier, G.
- Physics of Plasmas, Vol. 20, Issue 10
Equilibrium analysis of current profiles in tokamaks
journal, June 1990
- Lao, L. L.; Ferron, J. R.; Groebner, R. J.
- Nuclear Fusion, Vol. 30, Issue 6
Steepest-descent moment method for three-dimensional magnetohydrodynamic equilibria
journal, January 1983
- Hirshman, S. P.
- Physics of Fluids, Vol. 26, Issue 12
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
High resolution numerical studies of separatrix splitting due to non-axisymmetric perturbation in DIII-D
journal, April 2009
- Wingen, A.; Evans, T. E.; Spatschek, K. H.
- Nuclear Fusion, Vol. 49, Issue 5
Homoclinic tangles, bifurcations and edge stochasticity in diverted tokamaks
journal, April 2004
- Evans, T. E.; Roeder, R. K. W.; Carter, J. A.
- Contributions to Plasma Physics, Vol. 44, Issue 13
Traces of stable and unstable manifolds in heat flux patterns
journal, April 2007
- Wingen, A.; Jakubowski, M.; Spatschek, K. H.
- Physics of Plasmas, Vol. 14, Issue 4
RMP ELM suppression in DIII-D plasmas with ITER similar shapes and collisionalities
journal, January 2008
- Evans, T. E.; Fenstermacher, M. E.; Moyer, R. A.
- Nuclear Fusion, Vol. 48, Issue 2
Critical edge parameters for H-mode transition in DIII-D
journal, May 1998
- Groebner, R. J.; Carlstrom, T. N.
- Plasma Physics and Controlled Fusion, Vol. 40, Issue 5
Initial results of the high resolution edge Thomson scattering upgrade at DIII-D
journal, October 2012
- Eldon, D.; Bray, B. D.; Deterly, T. M.
- Review of Scientific Instruments, Vol. 83, Issue 10
Analysis of toroidal phasing of resonant magnetic perturbation effects on edge transport in the DIII-D tokamak
journal, May 2013
- Wilks, T. M.; Stacey, W. M.; Evans, T. E.
- Physics of Plasmas, Vol. 20, Issue 5
Calculations of two-fluid linear response to non-axisymmetric fields in tokamaks
journal, May 2012
- Ferraro, N. M.
- Physics of Plasmas, Vol. 19, Issue 5
Target plate conditions during stochastic boundary operation on DIII-D
journal, June 2007
- Watkins, J. G.; Evans, T. E.; Lasnier, C. J.
- Journal of Nuclear Materials, Vol. 363-365
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
Analysis of edge magnetic field line structure in ITER due to in-vessel ELM control coils
journal, September 2012
- Orlov, Dmitri M.; Evans, Todd E.; Moyer, Richard A.
- Fusion Engineering and Design, Vol. 87, Issue 9
3D vacuum magnetic field modelling of the ITER ELM control coil during standard operating scenarios
journal, August 2013
- Evans, T. E.; Orlov, D. M.; Wingen, A.
- Nuclear Fusion, Vol. 53, Issue 9
Impact of plasma response on plasma displacements in DIII-D during application of external 3D perturbations
journal, May 2014
- Wingen, A.; Ferraro, N. M.; Shafer, M. W.
- Nuclear Fusion, Vol. 54, Issue 6
Extended MHD simulation of resonant magnetic perturbations
journal, April 2009
- Strauss, H. R.; Sugiyama, L.; Park, G. Y.
- Nuclear Fusion, Vol. 49, Issue 5
Plasma transport in stochastic magnetic field caused by vacuum resonant magnetic perturbations at diverted tokamak edge
journal, October 2010
- Park, G.; Chang, C. S.; Joseph, I.
- Physics of Plasmas, Vol. 17, Issue 10
Works referencing / citing this record:
Imaging divertor strike point splitting in RMP ELM suppression experiments in the DIII-D tokamak
journal, October 2018
- Moyer, R. A.; Bykov, I.; Orlov, D. M.
- Review of Scientific Instruments, Vol. 89, Issue 10
Advances in the physics understanding of ELM suppression using resonant magnetic perturbations in DIII-D
journal, January 2015
- Wade, M. R.; Nazikian, R.; deGrassie, J. S.
- Nuclear Fusion, Vol. 55, Issue 2
Assessment of equilibrium field coil misalignments on the divertor footprints in NSTX-U
journal, June 2019
- Munaretto, S.; Evans, T. E.; Ferraro, N. M.
- Nuclear Fusion, Vol. 59, Issue 7