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

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.

Description

Funding Information: This work was supported by US DOE under contract nos. DE-FC02-04ER54698, DE-AC52-07NA27344, DE-AC05-00OR22725 and DE-NA0003525. This work has been carried out within the framework of the EUROfusion Consortium and has received funding from the Euratom research and training programme 2014-2018 and 2019-20 under grant agreement number 633053. The views and opinions expressed herein do not necessarily reflect those of the European Commission. The authors would like to thank Mr. Henri Kumpulainen of Aalto University for his extraordinary and very much appreciated Python scripting support. | openaire: EC/H2020/633053/EU//EUROfusion

Keywords

DIII-D, Divertor plasma, Divertor Thomson Scattering, EDGE2D-EIRENE

DOI

10.1016/j.nme.2023.101372

Citation

Groth , M , 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 & the DIII-D team 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 ' , Nuclear Materials and Energy , vol. 34 , 101372 . https://doi.org/10.1016/j.nme.2023.101372

Permanent link to this item

https://urn.fi/URN:NBN:fi:aalto-202308305306

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[article-cris] Perustieteiden korkeakoulu / SCI

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