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

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

doi:10.1016/j.nme.2023.101372

Title: 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

Journal Article · 25 January 2023 · Nuclear Materials and Energy

DOI: https://doi.org/10.1016/j.nme.2023.101372 · OSTI ID:1923376

Groth, Mathias ^[1]; McLean, A. G. ^[2]; Meyer, W. H. ^[2]; Leonard, A. W. ^[3]; Allen, S. L. ^[2]; Corrigan, G. ^[4]; Fenstermacher, M. E. ^[2]; Harting, D. ^[5]; Lasnier, C. J. ^[2]; Scotti, F. ^[2]; Wang, H. Q. ^[3]; Watkins, J. G. ^[6]

Aalto Univ., Espoo (Finland)
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
General Atomics, San Diego, CA (United States)
Culham Science Centre, Abingdon (United Kingdom)
Culham Science Centre, Abingdon (United Kingdom); Forschungszentrum Jülich (Germany)
Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)

Comparisons of profiles of the electron temperature (T_e), density (n_e) and pressure (p_e) measured with Divertor Thomson Scattering in DIII-D low-confinement mode discharges to predictions from the edge fluid code EDGE2D-EIRENE show that the models implemented in EDGE2D-EIRENE predict the measurements within their collective uncertainties if the T_e at the separatrix (T_e,sep) is 10 eV, or higher. The simulations do not predict, however, the peaked T_e and ne profiles measured adjacent to the target plate when T_e,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 five-fold reduction of radial transport cannot reconcile the discrepancy between the measurements and predictions.

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Research Organization:: General Atomics, San Diego, CA (United States)

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

Grant/Contract Number:: FC02-04ER54698; AC52-07NA27344; AC05-00OR22725; NA0003525

OSTI ID:: 1923376

Report Number(s):: DOE-GA-54698; TRN: US2312421

Journal Information:: Nuclear Materials and Energy, Vol. 34; ISSN 2352-1791

Publisher:: ElsevierCopyright Statement

Country of Publication:: United States

Language:: English

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Title: 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

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