Validation of EDGDE2D-EIRENE predicted 2D distributions of electron temperature and density against divertor Thomson scattering measurements in the low-field side divertor leg in DIII-D

M. Groth; A.G. McLean; W.H. Meyer; A.W. Leonard; S.L. Allen; G. Corrigan; M.E. Fenstermacher; D. Harting; C.J. Lasnier; F. Scotti; H.Q. Wang; J.G. Watkins

Nuclear Materials and Energy (Mar 2023)

Validation of EDGDE2D-EIRENE predicted 2D distributions of electron temperature and density against divertor Thomson scattering measurements in the low-field side divertor leg in DIII-D

M. Groth,
A.G. McLean,
W.H. Meyer,
A.W. Leonard,
S.L. Allen,
G. Corrigan,
M.E. Fenstermacher,
D. Harting,
C.J. Lasnier,
F. Scotti,
H.Q. Wang,
J.G. Watkins

Affiliations

M. Groth: Aalto University, Espoo, Finland; Corresponding authors at: Aalto University, Otakaari 1, 02150 Espoo, Finland.
A.G. McLean: Lawrence Livermore National Laboratory, Livermore, CA, USA
W.H. Meyer: Lawrence Livermore National Laboratory, Livermore, CA, USA
A.W. Leonard: General Atomics, San Diego, CA, USA
S.L. Allen: Lawrence Livermore National Laboratory, Livermore, CA, USA
G. Corrigan: Culham Centre for Fusion Energy, Culham Science Centre, Abingdon, UK
M.E. Fenstermacher: Lawrence Livermore National Laboratory, Livermore, CA, USA
D. Harting: Culham Centre for Fusion Energy, Culham Science Centre, Abingdon, UK; Forschungszentrum Jülich, Institute for Energy and Climate Research Plasma Physics, Jülich, Germany
C.J. Lasnier: Lawrence Livermore National Laboratory, Livermore, CA, USA
F. Scotti: Lawrence Livermore National Laboratory, Livermore, CA, USA
H.Q. Wang: General Atomics, San Diego, CA, USA
J.G. Watkins: Sandia National Laboratory, Albuquerque, NM, USA; Corresponding authors at: Aalto University, Otakaari 1, 02150 Espoo, Finland.

Journal volume & issue: Vol. 34
p. 101372

Abstract

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Comparisons of profiles of the electron temperature (Te), density (ne) and pressure (pe) measured with Divertor Thomson Scattering in DIII-D low-confinement mode discharges to predictions from the edge fluid code EDGE2D-EIRENE [1] show that the models implemented in EDGE2D-EIRENE predict the measurements within their collective uncertainties if the Te at the separatrix (Te,sep) is 10 eV, or higher. The simulations do not predict, however, the peaked Te and ne profiles measured adjacent to the target plate when Te,sep, is below 10 eV, i.e., for the plasma downstream from the region of ionization of deuterium atoms. Inclusion of cross-field drifts and a fivefold reduction of radial transport cannot reconcile the discrepancy between the measurements and predictions.

Published in Nuclear Materials and Energy

ISSN: 2352-1791 (Online)
Publisher: Elsevier
Country of publisher: United Kingdom
LCC subjects: Technology: Electrical engineering. Electronics. Nuclear engineering: Nuclear engineering. Atomic power
Website: http://www.journals.elsevier.com/nuclear-materials-and-energy/

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