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Title: Cross-verification of neoclassical transport solutions from XGCa against NEO

Abstract

Radial neoclassical transport from the global gyrokinetic code XGC has been cross-verified against the local drift-kinetic neoclassical code NEO in NEO's local regime using a Grad-Shafranov 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 drift-kinetic equations agree and that the linearized and nonlinear Coulomb collision operators agree in the mild gradient, local regime.

Authors:
ORCiD logo [1]; ORCiD logo [1]; ORCiD logo [1]
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  1. 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:  
AC02-09CH11466; FC02-04ER54698; AC02-06CH11357; AC02-05CH11231
Resource Type:
Accepted Manuscript
Journal Name:
Physics of Plasmas
Additional Journal Information:
Journal Volume: 26; Journal Issue: 10; 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

Hager, R., Dominski, J., and Chang, C. S. Cross-verification of neoclassical transport solutions from XGCa against NEO. United States: N. p., 2019. Web. doi:10.1063/1.5121308.
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Hager, R., Dominski, J., & Chang, C. S. Cross-verification of neoclassical transport solutions from XGCa against NEO. United States. doi:10.1063/1.5121308.
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Hager, R., Dominski, J., and Chang, C. S. Tue . "Cross-verification of neoclassical transport solutions from XGCa against NEO". United States. doi:10.1063/1.5121308. https://www.osti.gov/servlets/purl/1573464.
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@article{osti_1573464,
title = {Cross-verification 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 cross-verified against the local drift-kinetic neoclassical code NEO in NEO's local regime using a Grad-Shafranov 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 drift-kinetic 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}
}
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Journal Article:
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DOI:  10.1063/1.5121308
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Figures / Tables:

FIG. 1 FIG. 1: Plasma profiles and safety-factor used for the benchmark between XGC and NEO. a) Flux-surface averaged density and temperature profiles. b) Nonlocality parameter3 ∆b/L∇ for density and temperature. c) Safety factor q, inverse aspect ratio ϵ, and Shafranov shift |∆′|. d) Ion and electron collisionality.
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Works referenced in this record:

A fast low-to-high confinement mode bifurcation dynamics in the boundary-plasma gyrokinetic code XGC1
journal, May 2018

  • Ku, S.; Chang, C. S.; Hager, R.
  • Physics of Plasmas, Vol. 25, Issue 5
  • DOI: 10.1063/1.5020792

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
  • DOI: 10.1016/j.jcp.2011.05.034

Study of up–down poloidal density asymmetry of high- impurities with the new impurity version of XGCa
journal, October 2019

A drift-kinetic Semi-Lagrangian 4D code for ion turbulence simulation
journal, September 2006

  • Grandgirard, V.; Brunetti, M.; Bertrand, P.
  • Journal of Computational Physics, Vol. 217, Issue 2
  • DOI: 10.1016/j.jcp.2006.01.023

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
  • DOI: 10.1063/1.872590

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
  • DOI: 10.1006/jcph.1993.1005

Electron temperature gradient driven turbulence
journal, May 2000

  • Jenko, F.; Dorland, W.; Kotschenreuther, M.
  • Physics of Plasmas, Vol. 7, Issue 5
  • DOI: 10.1063/1.874014

A high-accuracy Eulerian gyrokinetic solver for collisional plasmas
journal, November 2016

Numerical study of tokamak equilibria with arbitrary flow
journal, February 2004

  • Guazzotto, L.; Betti, R.; Manickam, J.
  • Physics of Plasmas, Vol. 11, Issue 2
  • DOI: 10.1063/1.1637918

On the validity of the local diffusive paradigm in turbulent plasma transport
journal, August 2010

Large-scale gyrokinetic turbulence simulations: Effects of profile variation
journal, May 1999

  • Parker, Scott E.; Kim, Charlson; Chen, Yang
  • Physics of Plasmas, Vol. 6, Issue 5
  • DOI: 10.1063/1.873429

Global linear gyrokinetic simulations in quasi-symmetric configurations
journal, July 2001

  • Jost, G.; Tran, T. M.; Cooper, W. A.
  • Physics of Plasmas, Vol. 8, Issue 7
  • DOI: 10.1063/1.1374585

Conservative global gyrokinetic toroidal full-f five-dimensional Vlasov simulation
journal, September 2008

  • Idomura, Yasuhiro; Ida, Masato; Kano, Takuma
  • Computer Physics Communications, Vol. 179, Issue 6
  • DOI: 10.1016/j.cpc.2008.04.005

A global collisionless PIC code in magnetic coordinates
journal, September 2007

Verification of electromagnetic fluid-kinetic hybrid electron model in global gyrokinetic particle simulation
journal, March 2013

A fully non-linear multi-species Fokker–Planck–Landau collision operator for simulation of fusion plasma
journal, June 2016

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
  • DOI: 10.1063/1.3459096

Electron Temperature Gradient Turbulence
journal, December 2000

Gyro-kinetic 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
  • DOI: 10.1063/1.2338775

Turbulent Transport Reduction by Zonal Flows: Massively Parallel Simulations
journal, September 1998

Kinetic calculation of neoclassical transport including self-consistent electron and impurity dynamics
journal, July 2008

Theory of plasma transport in toroidal confinement systems
journal, April 1976

Full linearized Fokker–Planck collisions in neoclassical transport simulations
journal, December 2011

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
  • DOI: 10.1063/1.5036563
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    TABLE I (p. 5)table
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