Crossverification of neoclassical transport solutions from XGCa against NEO
Abstract
Radial neoclassical transport from the global gyrokinetic code XGC has been crossverified against the local driftkinetic neoclassical code NEO in NEO's local regime using a GradShafranov equilibrium with a circular boundary. XGC shows excellent agreement with NEO, except for a difference of approximately 10% in the ion heat flux. Close investigation reveals that this difference is due to the simplification in NEO to use the same Coulomb logarithm ln Λ to represent all particle species, while XGC uses different formulas for collisions between different species. When XGC uses NEO's Coulomb logarithm, excellent agreement in the ion heat flux is recovered. Here, the present work not only crossverifies the equation solvers in two codes, but also verifies that the gyrokinetic and the driftkinetic equations agree and that the linearized and nonlinear Coulomb collision operators agree in the mild gradient, local regime.
 Authors:

 Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States)
 Publication Date:
 Research Org.:
 Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States)
 Sponsoring Org.:
 USDOE
 OSTI Identifier:
 1573464
 Alternate Identifier(s):
 OSTI ID: 1570494
 Grant/Contract Number:
 AC0209CH11466; FC0204ER54698; AC0206CH11357; AC0205CH11231
 Resource Type:
 Accepted Manuscript
 Journal Name:
 Physics of Plasmas
 Additional Journal Information:
 Journal Volume: 26; Journal Issue: 10; Journal ID: ISSN 1070664X
 Publisher:
 American Institute of Physics (AIP)
 Country of Publication:
 United States
 Language:
 English
 Subject:
 70 PLASMA PHYSICS AND FUSION TECHNOLOGY
Citation Formats
Hager, R., Dominski, J., and Chang, C. S. Crossverification of neoclassical transport solutions from XGCa against NEO. United States: N. p., 2019.
Web. doi:10.1063/1.5121308.
Hager, R., Dominski, J., & Chang, C. S. Crossverification of neoclassical transport solutions from XGCa against NEO. United States. doi:10.1063/1.5121308.
Hager, R., Dominski, J., and Chang, C. S. Tue .
"Crossverification of neoclassical transport solutions from XGCa against NEO". United States. doi:10.1063/1.5121308. https://www.osti.gov/servlets/purl/1573464.
@article{osti_1573464,
title = {Crossverification of neoclassical transport solutions from XGCa against NEO},
author = {Hager, R. and Dominski, J. and Chang, C. S.},
abstractNote = {Radial neoclassical transport from the global gyrokinetic code XGC has been crossverified against the local driftkinetic neoclassical code NEO in NEO's local regime using a GradShafranov equilibrium with a circular boundary. XGC shows excellent agreement with NEO, except for a difference of approximately 10% in the ion heat flux. Close investigation reveals that this difference is due to the simplification in NEO to use the same Coulomb logarithm ln Λ to represent all particle species, while XGC uses different formulas for collisions between different species. When XGC uses NEO's Coulomb logarithm, excellent agreement in the ion heat flux is recovered. Here, the present work not only crossverifies the equation solvers in two codes, but also verifies that the gyrokinetic and the driftkinetic equations agree and that the linearized and nonlinear Coulomb collision operators agree in the mild gradient, local regime.},
doi = {10.1063/1.5121308},
journal = {Physics of Plasmas},
number = 10,
volume = 26,
place = {United States},
year = {2019},
month = {10}
}
Web of Science
Works referenced in this record:
A fast lowtohigh confinement mode bifurcation dynamics in the boundaryplasma gyrokinetic code XGC1
journal, May 2018
 Ku, S.; Chang, C. S.; Hager, R.
 Physics of Plasmas, Vol. 25, Issue 5
The global version of the gyrokinetic turbulence code GENE
journal, August 2011
 Görler, T.; Lapillonne, X.; Brunner, S.
 Journal of Computational Physics, Vol. 230, Issue 18
Study of up–down poloidal density asymmetry of high impurities with the new impurity version of XGCa
journal, October 2019
 Dominski, J.; Chang, C. S.; Hager, R.
 Journal of Plasma Physics, Vol. 85, Issue 5
A driftkinetic SemiLagrangian 4D code for ion turbulence simulation
journal, September 2006
 Grandgirard, V.; Brunetti, M.; Bertrand, P.
 Journal of Computational Physics, Vol. 217, Issue 2
The radial electric field dynamics in the neoclassical plasmas
journal, December 1997
 Novakovskii, S. V.; Liu, C. S.; Sagdeev, R. Z.
 Physics of Plasmas, Vol. 4, Issue 12
A Suitable Boundary Condition for Bounded Plasma Simulation without Sheath Resolution
journal, January 1993
 Parker, S. E.; Procassini, R. J.; Birdsall, C. K.
 Journal of Computational Physics, Vol. 104, Issue 1
Gyrokinetic study of collisional resonant magnetic perturbation (RMP)driven plasma density and heat transport in tokamak edge plasma using a magnetohydrodynamic screened RMP field
journal, September 2019
 Hager, Robert; Chang, C. S.; Ferraro, N. M.
 Nuclear Fusion, Vol. 59, Issue 12
Electron temperature gradient driven turbulence
journal, May 2000
 Jenko, F.; Dorland, W.; Kotschenreuther, M.
 Physics of Plasmas, Vol. 7, Issue 5
A highaccuracy Eulerian gyrokinetic solver for collisional plasmas
journal, November 2016
 Candy, J.; Belli, E. A.; Bravenec, R. V.
 Journal of Computational Physics, Vol. 324
Numerical study of tokamak equilibria with arbitrary flow
journal, February 2004
 Guazzotto, L.; Betti, R.; Manickam, J.
 Physics of Plasmas, Vol. 11, Issue 2
On the validity of the local diffusive paradigm in turbulent plasma transport
journal, August 2010
 DifPradalier, G.; Diamond, P. H.; Grandgirard, V.
 Physical Review E, Vol. 82, Issue 2
Gyrokinetic neoclassical study of the bootstrap current in the tokamak edge pedestal with fully nonlinear Coulomb collisions
journal, April 2016
 Hager, Robert; Chang, C. S.
 Physics of Plasmas, Vol. 23, Issue 4
Largescale gyrokinetic turbulence simulations: Effects of profile variation
journal, May 1999
 Parker, Scott E.; Kim, Charlson; Chen, Yang
 Physics of Plasmas, Vol. 6, Issue 5
Global linear gyrokinetic simulations in quasisymmetric configurations
journal, July 2001
 Jost, G.; Tran, T. M.; Cooper, W. A.
 Physics of Plasmas, Vol. 8, Issue 7
Conservative global gyrokinetic toroidal fullf fivedimensional Vlasov simulation
journal, September 2008
 Idomura, Yasuhiro; Ida, Masato; Kano, Takuma
 Computer Physics Communications, Vol. 179, Issue 6
A global collisionless PIC code in magnetic coordinates
journal, September 2007
 Jolliet, S.; Bottino, A.; Angelino, P.
 Computer Physics Communications, Vol. 177, Issue 5
Verification of electromagnetic fluidkinetic hybrid electron model in global gyrokinetic particle simulation
journal, March 2013
 Holod, I.; Lin, Z.
 Physics of Plasmas, Vol. 20, Issue 3
A FokkerPlanckLandau collision equation solver on twodimensional velocity grid and its application to particleincell simulation
journal, March 2014
 Yoon, E. S.; Chang, C. S.
 Physics of Plasmas, Vol. 21, Issue 3
A fully nonlinear multispecies Fokker–Planck–Landau collision operator for simulation of fusion plasma
journal, June 2016
 Hager, Robert; Yoon, E. S.; Ku, S.
 Journal of Computational Physics, Vol. 315
Nonlinear flow generation by electrostatic turbulence in tokamaks
journal, July 2010
 Wang, W. X.; Diamond, P. H.; Hahm, T. S.
 Physics of Plasmas, Vol. 17, Issue 7
Electron Temperature Gradient Turbulence
journal, December 2000
 Dorland, W.; Jenko, F.; Kotschenreuther, M.
 Physical Review Letters, Vol. 85, Issue 26
Gyrokinetic simulation of global turbulent transport properties in tokamak experiments
journal, September 2006
 Wang, W. X.; Lin, Z.; Tang, W. M.
 Physics of Plasmas, Vol. 13, Issue 9
Turbulent Transport Reduction by Zonal Flows: Massively Parallel Simulations
journal, September 1998
 Lin, Z.
 Science, Vol. 281, Issue 5384
Kinetic calculation of neoclassical transport including selfconsistent electron and impurity dynamics
journal, July 2008
 Belli, E. A.; Candy, J.
 Plasma Physics and Controlled Fusion, Vol. 50, Issue 9
Fullf gyrokinetic particle simulation of centrally heated global ITG turbulence from magnetic axis to edge pedestal top in a realistic tokamak geometry
journal, September 2009
 Ku, S.; Chang, C. S.; Diamond, P. H.
 Nuclear Fusion, Vol. 49, Issue 11
Theory of plasma transport in toroidal confinement systems
journal, April 1976
 Hinton, F. L.; Hazeltine, R. D.
 Reviews of Modern Physics, Vol. 48, Issue 2
Full linearized Fokker–Planck collisions in neoclassical transport simulations
journal, December 2011
 Belli, E. A.; Candy, J.
 Plasma Physics and Controlled Fusion, Vol. 54, Issue 1
Crossverification of the global gyrokinetic codes GENE and XGC
journal, June 2018
 Merlo, G.; Dominski, J.; Bhattacharjee, A.
 Physics of Plasmas, Vol. 25, Issue 6