EDGE2D-EIRENE predictions of molecular emission in DIII-D high-recycling divertor plasmas
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Journal Title
Journal ISSN
Volume Title
A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
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Date
2019-05-01
Major/Subject
Mcode
Degree programme
Language
en
Pages
7
211-217
211-217
Series
Nuclear Materials and Energy, Volume 19
Abstract
The contributions of deuterium molecular emission to the total deuterium radiation was assessed in DIII-D ohmically-confined plasmas in high-recycling divertor conditions. Radial profiles of the deuterium Ly-α line intensity across the low-field side divertor leg were obtained with the recently installed divertor Survey Poor Resolution, Extended Spectrometer [1]. A high-resolution spectrometer was used to measure the poloidal profiles of the deuterium Balmer-α and the deuterium Fulcher-α band intensity in the visible wavelength range. The scrape-off layer plasma and neutral distributions were simulated using the edge fluid EDGE2D-EIRENE [2], and the numerical solutions constrained utilizing Thomson scattering and Langmuir probe measurements at the low-field side midplane and the divertor target plate. The studies show that for these conditions molecular emission plays a negligible role in the total radiative power balance of the low-field side divertor, but molecular processes are important when evaluating deuterium Balmer-α line intensity for code-experiment validation.Description
| openaire: EC/H2020/633053/EU//EUROfusion
Keywords
Deuterium atomic and molecular emission, DIII-D, Divertor edge fluid simulations, EDGE2D-EIRENE, EIRENE, Lyman-Werner and Fulcher band
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Citation
Groth , M , Lomanowski , B & the DIII-D team 2019 , ' EDGE2D-EIRENE predictions of molecular emission in DIII-D high-recycling divertor plasmas ' , Nuclear Materials and Energy , vol. 19 , pp. 211-217 . https://doi.org/10.1016/j.nme.2019.02.035
