Synergistic cross-scale coupling of turbulence in a tokamak plasma

Howard, N. T.; Holland, C.; White, A. E.; Greenwald, M.; Candy, J.

doi:10.1063/1.4902366

Title: Synergistic cross-scale coupling of turbulence in a tokamak plasma

Journal Article · Mon Nov 24 00:00:00 EST 2014 · Physics of Plasmas

DOI:https://doi.org/10.1063/1.4902366· OSTI ID:1546776

Howard, N. T. ^[1]; Holland, C. ^[2]; White, A. E. ^[3]; Greenwald, M. ^[3]; Candy, J. ^[4]

Oak Ridge Inst. for Science and Education (ORISE), Oak Ridge, TN (United States)
Univ. of California, San Diego, CA (United States)
Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States). Plasma Science and Fusion Center
General Atomics, San Diego, CA (United States)

For the first time, nonlinear gyrokinetic simulations spanning both the ion and electron spatio-temporal scales have been performed with realistic electron mass ratio ((m_D/m_e)^1/2 = 60.0), realistic geometry, and all experimental inputs, demonstrating the coexistence and synergy of ion ( $(k_{θ} ρ_{s} \sim O (1.0))$ ) and electron-scale ( $(k_{θ} ρ_{e} \sim O (1.0))$ ) turbulence in the core of a tokamak plasma. All multi-scale simulations utilized the GYRO code [J. Candy and R. E. Waltz, J. Comput. Phys. 186, 545 (2003)] to study the coupling of ion and electron-scale turbulence in the core (r/a = 0.6) of an Alcator C-Mod L-mode discharge shown previously to exhibit an under-prediction of the electron heat flux when using simulations only including ion-scale turbulence. Electron-scale turbulence is found to play a dominant role in setting the electron heat flux level and radially elongated (k_r ≪ k_θ) “streamers” are found to coexist with ion-scale eddies in experimental plasma conditions. Inclusion of electron-scale turbulence in these simulations is found to increase both ion and electron heat flux levels by enhancing the transport at the ion-scale while also driving electron heat flux at sub-ρ_i scales. The combined increases in the low and high-k driven electron heat flux may explain previously observed discrepancies between simulated and experimental electron heat fluxes and indicates a complex interaction of short and long wavelength turbulence.

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Research Organization:: Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Fusion Energy Sciences (FES)

Grant/Contract Number:: FC02-99ER54512; AC02-05CH11231; FC02-99ER54512-CMOD

OSTI ID:: 1546776

Alternate ID(s):: OSTI ID: 1224317

Journal Information:: Physics of Plasmas, Vol. 21, Issue 11; ISSN 1070-664X

Publisher:: American Institute of Physics (AIP)Copyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 46 works

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References (23)

Gyrokinetic Simulations of Solar Wind Turbulence from Ion to Electron Scales Howes, G. G.; TenBarge, J. M.; Dorland, W. Physical Review Letters, Vol. 107, Issue 3 https://doi.org/10.1103/PhysRevLett.107.035004	journal	July 2011
The effect of ion-scale dynamics on electron-temperature-gradient turbulence Candy, J.; Waltz, R. E.; Fahey, M. R. Plasma Physics and Controlled Fusion, Vol. 49, Issue 8 https://doi.org/10.1088/0741-3335/49/8/008	journal	July 2007
An Eulerian gyrokinetic-Maxwell solver Candy, J.; Waltz, R. E. Journal of Computational Physics, Vol. 186, Issue 2 https://doi.org/10.1016/S0021-9991(03)00079-2	journal	April 2003
Electron Temperature Gradient Turbulence Dorland, W.; Jenko, F.; Kotschenreuther, M. Physical Review Letters, Vol. 85, Issue 26 https://doi.org/10.1103/PhysRevLett.85.5579	journal	December 2000
Progress in simulating turbulent electron thermal transport in NSTX Guttenfelder, W.; Peterson, J. L.; Candy, J. Nuclear Fusion, Vol. 53, Issue 9 https://doi.org/10.1088/0029-5515/53/9/093022	journal	August 2013
Anomalous Transport Scaling in the DIII-D Tokamak Matched by Supercomputer Simulation Candy, J.; Waltz, R. E. Physical Review Letters, Vol. 91, Issue 4 https://doi.org/10.1103/PhysRevLett.91.045001	journal	July 2003
Short-Scale Turbulent Fluctuations Driven by the Electron-Temperature Gradient in the National Spherical Torus Experiment Mazzucato, E.; Smith, D. R.; Bell, R. E. Physical Review Letters, Vol. 101, Issue 7 https://doi.org/10.1103/PhysRevLett.101.075001	journal	August 2008
Prediction of Significant Tokamak Turbulence at Electron Gyroradius Scales Jenko, F.; Dorland, W. Physical Review Letters, Vol. 89, Issue 22 https://doi.org/10.1103/PhysRevLett.89.225001	journal	November 2002
Scale Separation between Electron and Ion Thermal Transport Görler, T.; Jenko, F. Physical Review Letters, Vol. 100, Issue 18 https://doi.org/10.1103/PhysRevLett.100.185002	journal	May 2008
Drift waves and transport Horton, W. Reviews of Modern Physics, Vol. 71, Issue 3 https://doi.org/10.1103/RevModPhys.71.735	journal	April 1999
Multi-channel transport experiments at Alcator C-Mod and comparison with gyrokinetic simulations White, A. E.; Howard, N. T.; Greenwald, M. Physics of Plasmas, Vol. 20, Issue 5 https://doi.org/10.1063/1.4803089	journal	May 2013
Observations of Reduced Electron Gyroscale Fluctuations in National Spherical Torus Experiment $H$ -Mode Plasmas with Large $E \times B$ Flow Shear Smith, D. R.; Kaye, S. M.; Lee, W. Physical Review Letters, Vol. 102, Issue 22 https://doi.org/10.1103/PhysRevLett.102.225005	journal	June 2009
Validation of the gyrokinetic model in ITG and TEM dominated L-mode plasmas Howard, N. T.; White, A. E.; Reinke, M. L. Nuclear Fusion, Vol. 53, Issue 12 https://doi.org/10.1088/0029-5515/53/12/123011	journal	November 2013
A simple model of interactions between electron temperature gradient and drift-wave turbulence Holland, C.; Diamond, P. H. Physics of Plasmas, Vol. 11, Issue 3 https://doi.org/10.1063/1.1646675	journal	March 2004
Reduced electron thermal transport in low collisionality H-mode plasmas in DIII-D and the importance of TEM/ETG-scale turbulence Schmitz, L.; Holland, C.; Rhodes, T. L. Nuclear Fusion, Vol. 52, Issue 2 https://doi.org/10.1088/0029-5515/52/2/023003	journal	January 2012
Suppressing electron turbulence and triggering internal transport barriers with reversed magnetic shear in the National Spherical Torus Experiment Peterson, J. L.; Bell, R.; Candy, J. Physics of Plasmas, Vol. 19, Issue 5 https://doi.org/10.1063/1.4718456	journal	May 2012
Noncircular, finite aspect ratio, local equilibrium model Miller, R. L.; Chu, M. S.; Greene, J. M. Physics of Plasmas, Vol. 5, Issue 4 https://doi.org/10.1063/1.872666	journal	April 1998
Coupled ion temperature gradient and trapped electron mode to electron temperature gradient mode gyrokinetic simulations Waltz, R. E.; Candy, J.; Fahey, M. Physics of Plasmas, Vol. 14, Issue 5 https://doi.org/10.1063/1.2436851	journal	May 2007
Multi-scale gyrokinetic simulation of Alcator C-Mod tokamak discharges Howard, N. T.; White, A. E.; Greenwald, M. Physics of Plasmas, Vol. 21, Issue 3 https://doi.org/10.1063/1.4869078	journal	March 2014
Electron temperature gradient driven transport in a MAST H-mode plasma Joiner, N.; Applegate, D.; Cowley, S. C. Plasma Physics and Controlled Fusion, Vol. 48, Issue 5 https://doi.org/10.1088/0741-3335/48/5/013	journal	April 2006
Investigation of the transport shortfall in Alcator C-Mod L-mode plasmas Howard, N. T.; White, A. E.; Greenwald, M. Physics of Plasmas, Vol. 20, Issue 3 https://doi.org/10.1063/1.4795301	journal	March 2013
Cross-scale: multi-scale coupling in space plasmas Schwartz, Steven J.; Horbury, Timothy; Owen, Christopher Experimental Astronomy, Vol. 23, Issue 3 https://doi.org/10.1007/s10686-008-9085-x	journal	March 2008
Response of multiscale turbulence to electron cyclotron heating in the DIII-D tokamak Rhodes, T. L.; Peebles, W. A.; Van Zeeland, M. A. Physics of Plasmas, Vol. 14, Issue 5 https://doi.org/10.1063/1.2714019	journal	May 2007

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Impact of electron-scale turbulence and multi-scale interactions in the JET tokamak Bonanomi, N.; Mantica, P.; Citrin, J. Nuclear Fusion, Vol. 58, Issue 12 https://doi.org/10.1088/1741-4326/aae0a8	journal	September 2018
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