Validation of nonlinear gyrokinetic simulations of L- and I-mode plasmas on Alcator C-Mod
Abstract
New validation of global, nonlinear, ion-scale gyrokinetic simulations (GYRO) is carried out for L- and I-mode plasmas on Alcator C-Mod, utilizing heat fluxes, profile stiffness, and temperature fluctuations. Previous work at C-Mod found that ITG/TEM-scale GYRO simulations can match both electron and ion heat fluxes within error bars in I-mode [White PoP 2015], suggesting that multi-scale (cross-scale coupling) effects [Howard PoP 2016] may be less important in I-mode than in L-mode. New results presented here, however, show that global, nonlinear, ion-scale GYRO simulations are able to match the experimental ion heat flux, but underpredict electron heat flux (at most radii), electron temperature fluctuations, and perturbative thermal diffusivity in both L- and I-mode. Linear addition of electron heat flux from electron scale runs does not resolve this discrepancy. These results indicate that single-scale simulations do not sufficiently describe the I-mode core transport, and that multi-scale (coupled electron- and ion-scale) transport models are needed. In conclusion a preliminary investigation with multi-scale TGLF, however, was unable to resolve the discrepancy between ion-scale GYRO and experimental electron heat fluxes and perturbative diffusivity, motivating further work with multi-scale GYRO simulations and a more comprehensive study with multi-scale TGLF.
- Authors:
-
[1];
[1];
[2];
- MIT Plasma Science and Fusion Center, Cambridge, Massachusetts 02139, USA
- General Atomics, San Diego, California 92186, USA
- Max Planck Institute for Plasma Physics, Garching, Germany
- University of California - Los Angeles, Los Angeles, California 92093, USA
- Publication Date:
- Research Org.:
- Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC)
- OSTI Identifier:
- 1348024
- Alternate Identifier(s):
- OSTI ID: 1349367; OSTI ID: 1430264
- Grant/Contract Number:
- SC0006419; FC02-99ER54512; AC02-05CH11231
- Resource Type:
- Published Article
- Journal Name:
- Physics of Plasmas
- Additional Journal Information:
- Journal Name: Physics of Plasmas Journal Volume: 24 Journal Issue: 5; Journal ID: ISSN 1070-664X
- Publisher:
- American Institute of Physics (AIP)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 70 PLASMA PHYSICS AND FUSION TECHNOLOGY
Citation Formats
Creely, A. J., Howard, N. T., Rodriguez-Fernandez, P., Cao, N., Hubbard, A. E., Hughes, J. W., Rice, J. E., White, A. E., Candy, J., Staebler, G. M., Conway, G. D., Freethy, S. J., and Sung, C. Validation of nonlinear gyrokinetic simulations of L- and I-mode plasmas on Alcator C-Mod. United States: N. p., 2017.
Web. doi:10.1063/1.4977466.
Creely, A. J., Howard, N. T., Rodriguez-Fernandez, P., Cao, N., Hubbard, A. E., Hughes, J. W., Rice, J. E., White, A. E., Candy, J., Staebler, G. M., Conway, G. D., Freethy, S. J., & Sung, C. Validation of nonlinear gyrokinetic simulations of L- and I-mode plasmas on Alcator C-Mod. United States. https://doi.org/10.1063/1.4977466
Creely, A. J., Howard, N. T., Rodriguez-Fernandez, P., Cao, N., Hubbard, A. E., Hughes, J. W., Rice, J. E., White, A. E., Candy, J., Staebler, G. M., Conway, G. D., Freethy, S. J., and Sung, C. Thu .
"Validation of nonlinear gyrokinetic simulations of L- and I-mode plasmas on Alcator C-Mod". United States. https://doi.org/10.1063/1.4977466.
@article{osti_1348024,
title = {Validation of nonlinear gyrokinetic simulations of L- and I-mode plasmas on Alcator C-Mod},
author = {Creely, A. J. and Howard, N. T. and Rodriguez-Fernandez, P. and Cao, N. and Hubbard, A. E. and Hughes, J. W. and Rice, J. E. and White, A. E. and Candy, J. and Staebler, G. M. and Conway, G. D. and Freethy, S. J. and Sung, C.},
abstractNote = {New validation of global, nonlinear, ion-scale gyrokinetic simulations (GYRO) is carried out for L- and I-mode plasmas on Alcator C-Mod, utilizing heat fluxes, profile stiffness, and temperature fluctuations. Previous work at C-Mod found that ITG/TEM-scale GYRO simulations can match both electron and ion heat fluxes within error bars in I-mode [White PoP 2015], suggesting that multi-scale (cross-scale coupling) effects [Howard PoP 2016] may be less important in I-mode than in L-mode. New results presented here, however, show that global, nonlinear, ion-scale GYRO simulations are able to match the experimental ion heat flux, but underpredict electron heat flux (at most radii), electron temperature fluctuations, and perturbative thermal diffusivity in both L- and I-mode. Linear addition of electron heat flux from electron scale runs does not resolve this discrepancy. These results indicate that single-scale simulations do not sufficiently describe the I-mode core transport, and that multi-scale (coupled electron- and ion-scale) transport models are needed. In conclusion a preliminary investigation with multi-scale TGLF, however, was unable to resolve the discrepancy between ion-scale GYRO and experimental electron heat fluxes and perturbative diffusivity, motivating further work with multi-scale GYRO simulations and a more comprehensive study with multi-scale TGLF.},
doi = {10.1063/1.4977466},
journal = {Physics of Plasmas},
number = 5,
volume = 24,
place = {United States},
year = {Thu Mar 02 00:00:00 EST 2017},
month = {Thu Mar 02 00:00:00 EST 2017}
}
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Works referenced in this record:
Measurements of the cross-phase angle between density and electron temperature fluctuations and comparison with gyrokinetic simulations
journal, May 2010
- White, A. E.; Peebles, W. A.; Rhodes, T. L.
- Physics of Plasmas, Vol. 17, Issue 5
Tokamak heat transport – a study of heat pulse propagation in JET
journal, November 1987
- Tubbing, B. J. D.; Lopes Cardozo, N. J.; Van der Wiel, M. J.
- Nuclear Fusion, Vol. 27, Issue 11
An Eulerian gyrokinetic-Maxwell solver
journal, April 2003
- Candy, J.; Waltz, R. E.
- Journal of Computational Physics, Vol. 186, Issue 2
Measurement of electron temperature fluctuations using a tunable correlation electron cyclotron emission system on Alcator C-Mod
journal, November 2014
- Howard, N. T.; Sung, C.; White, A. E.
- Review of Scientific Instruments, Vol. 85, Issue 11
20 years of research on the Alcator C-Mod tokamaka)
journal, November 2014
- Greenwald, M.; Bader, A.; Baek, S.
- Physics of Plasmas, Vol. 21, Issue 11
Perturbative thermal diffusivity from partial sawtooth crashes in Alcator C-Mod
journal, February 2016
- Creely, A. J.; White, A. E.; Edlund, E. M.
- Nuclear Fusion, Vol. 56, Issue 3
Threshold conditions for transitions to I-mode and H-mode with unfavourable ion grad B drift direction
journal, October 2012
- Hubbard, A. E.; Whyte, D. G.; Churchill, R. M.
- Nuclear Fusion, Vol. 52, Issue 11
Thomson scattering upgrades on Alcator C-Mod
journal, March 2003
- Hughes, J. W.; Mossessian, D.; Zhurovich, K.
- Review of Scientific Instruments, Vol. 74, Issue 3
Heat pulse propagation: Diffusive models checked against full transport calculations
journal, July 1988
- Lopes Cardozo, N. J.; Tubbing, B. J. D.; Tibone, F.
- Nuclear Fusion, Vol. 28, Issue 7
I-mode: an H-mode energy confinement regime with L-mode particle transport in Alcator C-Mod
journal, August 2010
- Whyte, D. G.; Hubbard, A. E.; Hughes, J. W.
- Nuclear Fusion, Vol. 50, Issue 10
Turbulence intermittency linked to the weakly coherent mode in ASDEX Upgrade I-mode plasmas
journal, May 2016
- Happel, T.; Manz, P.; Ryter, F.
- Nuclear Fusion, Vol. 56, Issue 6
Intensity interferometry for measurement of electron temperature fluctuations in fusion plasmas
journal, September 1993
- Sattler, S.; Hartfuss, H. J.
- Plasma Physics and Controlled Fusion, Vol. 35, Issue 9
A Key to Improved Ion Core Confinement in the JET Tokamak: Ion Stiffness Mitigation due to Combined Plasma Rotation and Low Magnetic Shear
journal, September 2011
- Mantica, P.; Angioni, C.; Challis, C.
- Physical Review Letters, Vol. 107, Issue 13
Quantitative comparison of experimental impurity transport with nonlinear gyrokinetic simulation in an Alcator C-Mod L-mode plasma
journal, April 2012
- Howard, N. T.; Greenwald, M.; Mikkelsen, D. R.
- Nuclear Fusion, Vol. 52, Issue 6
Electron temperature critical gradient and transport stiffness in DIII-D
journal, July 2015
- Smith, S. P.; Petty, C. C.; White, A. E.
- Nuclear Fusion, Vol. 55, Issue 8
Synergistic cross-scale coupling of turbulence in a tokamak plasma
journal, November 2014
- Howard, N. T.; Holland, C.; White, A. E.
- Physics of Plasmas, Vol. 21, Issue 11
Multi-scale gyrokinetic simulation of Alcator C-Mod tokamak discharges
journal, March 2014
- Howard, N. T.; White, A. E.; Greenwald, M.
- Physics of Plasmas, Vol. 21, Issue 3
Cross-Scale Interactions between Electron and Ion Scale Turbulence in a Tokamak Plasma
journal, June 2015
- Maeyama, S.; Idomura, Y.; Watanabe, T. -H.
- Physical Review Letters, Vol. 114, Issue 25
Multi-scale gyrokinetic simulations: Comparison with experiment and implications for predicting turbulence and transport
journal, April 2016
- Howard, N. T.; Holland, C.; White, A. E.
- Physics of Plasmas, Vol. 23, Issue 5
Nonlinear Stabilization of Tokamak Microturbulence by Fast Ions
journal, October 2013
- Citrin, J.; Jenko, F.; Mantica, P.
- Physical Review Letters, Vol. 111, Issue 15
Measurement of turbulent electron temperature fluctuations on the ASDEX Upgrade tokamak using correlated electron cyclotron emission
journal, July 2016
- Freethy, S. J.; Conway, G. D.; Classen, I.
- Review of Scientific Instruments, Vol. 87, Issue 11
The role of zonal flows in the saturation of multi-scale gyrokinetic turbulence
journal, June 2016
- Staebler, G. M.; Candy, J.; Howard, N. T.
- Physics of Plasmas, Vol. 23, Issue 6
Design of a correlation electron cyclotron emission diagnostic for Alcator C-Mod
journal, October 2012
- Sung, C.; White, A. E.; Irby, J. H.
- Review of Scientific Instruments, Vol. 83, Issue 10
Core impurity transport in Alcator C-Mod L-, I- and H-mode plasmas
journal, February 2015
- Rice, J. E.; Reinke, M. L.; Gao, C.
- Nuclear Fusion, Vol. 55, Issue 3
Spatially resolved high resolution x-ray spectroscopy for magnetically confined fusion plasmas (invited)
journal, October 2008
- Ince-Cushman, A.; Rice, J. E.; Bitter, M.
- Review of Scientific Instruments, Vol. 79, Issue 10, Article No. 10E302
Core temperature fluctuations and related heat transport in the Texas Experimental Tokamak‐Upgrade
journal, March 1995
- Cima, G.; Bravenec, R. V.; Wootton, A. J.
- Physics of Plasmas, Vol. 2, Issue 3
Studies of turbulence and transport in Alcator C-Mod H-mode plasmas with phase contrast imaging and comparisons with GYRO
journal, January 2009
- Lin, L.; Porkolab, M.; Edlund, E. M.
- Physics of Plasmas, Vol. 16, Issue 1
Characterization of density fluctuations during the search for an I-mode regime on the DIII-D tokamak
journal, August 2015
- Marinoni, A.; Rost, J. C.; Porkolab, M.
- Nuclear Fusion, Vol. 55, Issue 9
Experimental Evidence for Gradient Length-Driven Electron Transport in Tokamaks
journal, March 2001
- Ryter, F.; Leuterer, F.; Pereverzev, G.
- Physical Review Letters, Vol. 86, Issue 11
Edge-localized mode avoidance and pedestal structure in I-mode plasmas
journal, May 2014
- Walk, J. R.; Hughes, J. W.; Hubbard, A. E.
- Physics of Plasmas, Vol. 21, Issue 5
Studies of turbulence and transport in Alcator C-Mod ohmic plasmas with phase contrast imaging and comparisons with gyrokinetic simulations
journal, April 2009
- Lin, L.; Porkolab, M.; Edlund, E. M.
- Plasma Physics and Controlled Fusion, Vol. 51, Issue 6
Temperature fluctuations and their correlation with density fluctuations in W7-AS
journal, January 1999
- Häse, M.; Hirsch, M.; Hartfuss, H. J.
- Review of Scientific Instruments, Vol. 70, Issue 1
Edge energy transport barrier and turbulence in the I-mode regime on Alcator C-Mod
journal, May 2011
- Hubbard, A. E.; Whyte, D. G.; Churchill, R. M.
- Physics of Plasmas, Vol. 18, Issue 5
Changes in core electron temperature fluctuations across the ohmic energy confinement transition in Alcator C-Mod plasmas
journal, July 2013
- Sung, C.; White, A. E.; Howard, N. T.
- Nuclear Fusion, Vol. 53, Issue 8
Reduction of core turbulence in I-mode plasmas in Alcator C-Mod
journal, June 2014
- White, A. E.; Barnes, M.; Dominguez, A.
- Nuclear Fusion, Vol. 54, Issue 8
Heat pulse propagation studies on DIII-D and the Tokamak Fusion Test Reactor
journal, December 2000
- Fredrickson, E. D.; Austin, M. E.; Groebner, R.
- Physics of Plasmas, Vol. 7, Issue 12
A theory-based transport model with comprehensive physics
journal, May 2007
- Staebler, G. M.; Kinsey, J. E.; Waltz, R. E.
- Physics of Plasmas, Vol. 14, Issue 5
Nonlinear gyrokinetic simulations of the I-mode high confinement regime and comparisons with experimenta)
journal, May 2015
- White, A. E.; Howard, N. T.; Creely, A. J.
- Physics of Plasmas, Vol. 22, Issue 5
Perturbative transport studies in fusion plasmas
journal, August 1995
- Cardozo, N. J. Lopes
- Plasma Physics and Controlled Fusion, Vol. 37, Issue 8
Multi-device studies of pedestal physics and confinement in the I-mode regime
journal, July 2016
- Hubbard, A. E.; Osborne, T.; Ryter, F.
- Nuclear Fusion, Vol. 56, Issue 8
I-mode studies at ASDEX Upgrade: L-I and I-H transitions, pedestal and confinement properties
journal, October 2016
- Ryter, F.; Fischer, R.; Fuchs, J. C.
- Nuclear Fusion, Vol. 57, Issue 1
Works referencing / citing this record:
Correlation electron cyclotron emission diagnostic and improved calculation of turbulent temperature fluctuation levels on ASDEX Upgrade
journal, May 2018
- Creely, A. J.; Freethy, S. J.; Burke, W. M.
- Review of Scientific Instruments, Vol. 89, Issue 5
Verification of GENE and GYRO with L-mode and I-mode plasmas in Alcator C-Mod
journal, April 2018
- Mikkelsen, D. R.; Howard, N. T.; White, A. E.
- Physics of Plasmas, Vol. 25, Issue 4
Validation of gyrokinetic simulations with measurements of electron temperature fluctuations and density-temperature phase angles on ASDEX Upgrade
journal, May 2018
- Freethy, S. J.; Görler, T.; Creely, A. J.
- Physics of Plasmas, Vol. 25, Issue 5
Cross-verification of the global gyrokinetic codes GENE and XGC
journal, June 2018
- Merlo, G.; Dominski, J.; Bhattacharjee, A.
- Physics of Plasmas, Vol. 25, Issue 6
Experimental trends of reflectometry frequency spectra emerging from a systematic analysis of the Tore Supra database
journal, March 2019
- Sun, Y.; Sabot, R.; Heuraux, S.
- Physics of Plasmas, Vol. 26, Issue 3
Predict-first experiments and modeling of perturbative cold pulses in the DIII-D tokamak
journal, June 2019
- Rodriguez-Fernandez, P.; White, A. E.; Howard, N. T.
- Physics of Plasmas, Vol. 26, Issue 6
Gyrokinetic investigation of the ASDEX Upgrade I-mode pedestal
journal, December 2019
- Stimmel, K.; Bañón Navarro, A.; Happel, T.
- Physics of Plasmas, Vol. 26, Issue 12
VITALS: A Surrogate-Based Optimization Framework for the Accelerated Validation of Plasma Transport Codes
journal, February 2018
- Rodriguez-Fernandez, P.; White, A. E.; Creely, A. J.
- Fusion Science and Technology, Vol. 74, Issue 1-2
Criteria for the importance of multi-scale interactions in turbulent transport simulations
journal, June 2019
- Creely, A. J.; Rodriguez-Fernandez, P.; Conway, G. D.
- Plasma Physics and Controlled Fusion, Vol. 61, Issue 8
Validation study of GENE on ASDEX Upgrade using perturbative thermal diffusivity measured with partial sawtooth heat pulses
journal, September 2018
- Creely, A. J.; Görler, T.; Conway, G. D.
- Nuclear Fusion, Vol. 58, Issue 12
Initial transport and turbulence analysis and gyrokinetic simulation validation in NSTX-U L-mode plasmas
journal, April 2019
- Guttenfelder, W.; Kaye, S. M.; Kriete, D. M.
- Nuclear Fusion, Vol. 59, Issue 5
Scaling laws from theory-based modeling for different regimes in the DEMO fusion reactor
journal, July 2019
- Palermo, F.; Fable, E.; Angioni, C.
- Nuclear Fusion, Vol. 59, Issue 9