Gyrokinetic benchmark of the electron temperature-gradient instability in the pedestal region
Abstract
Transport from turbulence driven by the electron temperature-gradient (ETG) instability is likely a major source of electron heat losses through the pedestal. Due to extreme gradients and strong shaping, ETG instabilities in the pedestal are distinct from those in the core, having, for example, multiple branches (toroidal and slab) in different wavenumber ranges. Due to its importance for pedestal transport, and its rather exotic character, a rigorous multi-code benchmarking exercise is imperative. In this work, we describe such an exercise, wherein we have carried out a detailed comparison of local linear pedestal ETG simulations using three gyrokinetic codes, CGYRO, GEM, and GENE and testing different geometric parameters (such as circular, Miller, and equilibrium EFIT geometry). The resulting linear frequencies, growth rates, and eigenfunctions show very good agreement between the codes in the three types of employed geometries. A nonlinear benchmark between CGYRO and GENE is also described, exhibiting good agreement (a maximum of 20% difference in the heat fluxes computed) at two locations in the pedestal. This lays the foundation for confidently modeling ETG turbulence in the pedestal
- Authors:
-
[1];
[2];
[3];
- Univ. of Texas, Austin, TX (United States); Ain Shams Univ., Cairo (Egypt); Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
- Univ. of Texas, Austin, TX (United States)
- Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States)
- Univ. of Colorado, Boulder, CO (United States)
- Publication Date:
- Research Org.:
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Fusion Energy Sciences (FES)
- OSTI Identifier:
- 1807267
- Grant/Contract Number:
- AC05-00OR22725; SC0018148; FG02-04ER54742; SC0018271; SC0017992; AC02-09CH11466; FC02-04ER54698
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Physics of Plasmas
- Additional Journal Information:
- Journal Volume: 28; Journal Issue: 6; 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
Hassan, Ehab, Hatch, D. R., Guttenfelder, W., Chen, Y., and Parker, S. Gyrokinetic benchmark of the electron temperature-gradient instability in the pedestal region. United States: N. p., 2021.
Web. doi:10.1063/5.0043006.
Hassan, Ehab, Hatch, D. R., Guttenfelder, W., Chen, Y., & Parker, S. Gyrokinetic benchmark of the electron temperature-gradient instability in the pedestal region. United States. https://doi.org/10.1063/5.0043006
Hassan, Ehab, Hatch, D. R., Guttenfelder, W., Chen, Y., and Parker, S. Fri .
"Gyrokinetic benchmark of the electron temperature-gradient instability in the pedestal region". United States. https://doi.org/10.1063/5.0043006. https://www.osti.gov/servlets/purl/1807267.
@article{osti_1807267,
title = {Gyrokinetic benchmark of the electron temperature-gradient instability in the pedestal region},
author = {Hassan, Ehab and Hatch, D. R. and Guttenfelder, W. and Chen, Y. and Parker, S.},
abstractNote = {Transport from turbulence driven by the electron temperature-gradient (ETG) instability is likely a major source of electron heat losses through the pedestal. Due to extreme gradients and strong shaping, ETG instabilities in the pedestal are distinct from those in the core, having, for example, multiple branches (toroidal and slab) in different wavenumber ranges. Due to its importance for pedestal transport, and its rather exotic character, a rigorous multi-code benchmarking exercise is imperative. In this work, we describe such an exercise, wherein we have carried out a detailed comparison of local linear pedestal ETG simulations using three gyrokinetic codes, CGYRO, GEM, and GENE and testing different geometric parameters (such as circular, Miller, and equilibrium EFIT geometry). The resulting linear frequencies, growth rates, and eigenfunctions show very good agreement between the codes in the three types of employed geometries. A nonlinear benchmark between CGYRO and GENE is also described, exhibiting good agreement (a maximum of 20% difference in the heat fluxes computed) at two locations in the pedestal. This lays the foundation for confidently modeling ETG turbulence in the pedestal},
doi = {10.1063/5.0043006},
journal = {Physics of Plasmas},
number = 6,
volume = 28,
place = {United States},
year = {Fri Jun 18 00:00:00 EDT 2021},
month = {Fri Jun 18 00:00:00 EDT 2021}
}
Free Publicly Available Full Text
Publisher's Version of Record
Other availability
Search WorldCat to find libraries that may hold this journal
Save to My Library
You must Sign In or Create an Account in order to save documents to your library.
Works referenced in this record:
Impact of centrifugal drifts on ion turbulent transport
journal, March 2018
- Belli, E. A.; Candy, J.
- Physics of Plasmas, Vol. 25, Issue 3
Linearized model collision operators for multiple ion species plasmas and gyrokinetic entropy balance equations
journal, November 2009
- Sugama, H.; Watanabe, T. -H.; Nunami, M.
- Physics of Plasmas, Vol. 16, Issue 11
On microinstabilities and turbulence in steep-gradient regions of fusion devices
journal, February 2019
- Pueschel, M. J.; Hatch, D. R.; Ernst, D. R.
- Plasma Physics and Controlled Fusion, Vol. 61, Issue 3
Magnetic stochasticity and transport due to nonlinearly excited subdominant microtearing modes
journal, January 2013
- Hatch, D. R.; Pueschel, M. J.; Jenko, F.
- Physics of Plasmas, Vol. 20, Issue 1
Benchmarking gyrokinetic simulations in a toroidal flux-tube
journal, September 2013
- Chen, Y.; Parker, S. E.; Wan, W.
- Physics of Plasmas, Vol. 20, Issue 9
Microtearing turbulence limiting the JET-ILW pedestal
journal, August 2016
- Hatch, D. R.; Kotschenreuther, M.; Mahajan, S.
- Nuclear Fusion, Vol. 56, Issue 10
Characterizing electron temperature gradient turbulence via numerical simulation
journal, December 2006
- Nevins, W. M.; Candy, J.; Cowley, S.
- Physics of Plasmas, Vol. 13, Issue 12
Electron temperature gradient driven turbulence
journal, May 2000
- Jenko, F.; Dorland, W.; Kotschenreuther, M.
- Physics of Plasmas, Vol. 7, Issue 5
Electromagnetic gyrokinetic δf particle-in-cell turbulence simulation with realistic equilibrium profiles and geometry
journal, January 2007
- Chen, Yang; Parker, Scott E.
- Journal of Computational Physics, Vol. 220, Issue 2
Linear gyrokinetic analysis of a DIII-D H-mode pedestal near the ideal ballooning threshold
journal, September 2012
- Wang, E.; Xu, X.; Candy, J.
- Nuclear Fusion, Vol. 52, Issue 10
A high-accuracy Eulerian gyrokinetic solver for collisional plasmas
journal, November 2016
- Candy, J.; Belli, E. A.; Bravenec, R. V.
- Journal of Computational Physics, Vol. 324
Gyrokinetic turbulence under near-separatrix or nonaxisymmetric conditions
journal, May 2009
- Jenko, F.; Told, D.; Xanthopoulos, P.
- Physics of Plasmas, Vol. 16, Issue 5
Gyrokinetic analysis and simulation of pedestals to identify the culprits for energy losses using ‘fingerprints’
journal, July 2019
- Kotschenreuther, M.; Liu, X.; Hatch, D. R.
- Nuclear Fusion, Vol. 59, Issue 9
Resolving electron scale turbulence in spherical tokamaks with flow shear
journal, February 2011
- Guttenfelder, W.; Candy, J.
- Physics of Plasmas, Vol. 18, Issue 2
Direct gyrokinetic comparison of pedestal transport in JET with carbon and ITER-like walls
journal, July 2019
- Hatch, D. R.; Kotschenreuther, M.; Mahajan, S. M.
- Nuclear Fusion, Vol. 59, Issue 8
Gyrokinetic study of ASDEX Upgrade inter-ELM pedestal profile evolution
journal, May 2015
- Hatch, D. R.; Told, D.; Jenko, F.
- Nuclear Fusion, Vol. 55, Issue 6
Nonlinear gyrokinetic equations for low-frequency electromagnetic waves in general plasma equilibria
journal, January 1982
- Frieman, E. A.
- Physics of Fluids, Vol. 25, Issue 3
Gyrokinetic microinstabilities in ASDEX Upgrade edge plasmas
journal, October 2008
- Told, D.; Jenko, F.; Xanthopoulos, P.
- Physics of Plasmas, Vol. 15, Issue 10
Electron Temperature Gradient Turbulence
journal, December 2000
- Dorland, W.; Jenko, F.; Kotschenreuther, M.
- Physical Review Letters, Vol. 85, Issue 26
A gyrokinetic perspective on the JET-ILW pedestal
journal, January 2017
- Hatch, D. R.; Kotschenreuther, M.; Mahajan, S.
- Nuclear Fusion, Vol. 57, Issue 3
Testing predictions of electron scale turbulent pedestal transport in two DIII-D ELMy H-modes
journal, April 2021
- Guttenfelder, W.; Groebner, R. J.; Canik, J. M.
- Nuclear Fusion, Vol. 61, Issue 5
Ion temperature gradient turbulence simulations and plasma flux surface shape
journal, November 1999
- Waltz, R. E.; Miller, R. L.
- Physics of Plasmas, Vol. 6, Issue 11
Unconventional ballooning structures for toroidal drift waves
journal, September 2015
- Xie, Hua-sheng; Xiao, Yong
- Physics of Plasmas, Vol. 22, Issue 9
Noncircular, finite aspect ratio, local equilibrium model
journal, April 1998
- Miller, R. L.; Chu, M. S.; Greene, J. M.
- Physics of Plasmas, Vol. 5, Issue 4
Nonlinear electromagnetic gyrokinetic equation for plasmas with large mean flows
journal, July 1998
- Sugama, H.; Horton, W.
- Physics of Plasmas, Vol. 5, Issue 7
Coupled ion temperature gradient and trapped electron mode to electron temperature gradient mode gyrokinetic simulations
journal, May 2007
- Waltz, R. E.; Candy, J.; Fahey, M.
- Physics of Plasmas, Vol. 14, Issue 5