ELM and inter-ELM tungsten erosion sources in high-power, JET ITER-like wall H-mode plasmas

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Journal Title
Journal ISSN
Volume Title
A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
Date
2022-10
Major/Subject
Mcode
Degree programme
Language
en
Pages
8
1-8
Series
Nuclear Materials and Energy, Volume 33
Abstract
Simulations of JET ITER-like wall high-confinement mode plasmas, including type-I edge-localised modes (ELMs), using JINTRAC for the background plasmas and ERO2.0 for tungsten erosion and transport, predict virtually perfect screening of the primary W erosion sources at the divertor targets during both the ELM and inter-ELM phases. The largest source of W influx to the main plasma is predicted to be the outer vertical divertor due to sputtering by energetic fuel (D, T) atoms from charge-exchange reactions. ERO2.0 predictions accurately reproduce the measured W I emission in the low-field side divertor, but underpredict the W II emission by a factor of 10. Potential reasons for the W II discrepancy include uncertainties in the atomic data, assumptions on the sheath properties and the sputtering angle distribution, and the impact of metastable states.
Description
Funding Information: This work has been carried out within the framework of the EUROfusion Consortium, funded by the European Union via the Euratom Research and Training Programme (Grant Agreement No 101052200 — EUROfusion). Views and opinions expressed are however those of the author(s) only and do not necessarily reflect those of the European Union or the European Commission. Neither the European Union nor the European Commission can be held responsible for them. The ERO2.0 simulations utilised computing resources provided by the Science-IT project at Aalto University. Funding Information: This work has been carried out within the framework of the EUROfusion Consortium, funded by the European Union via the Euratom Research and Training Programme (Grant Agreement No 101052200 — EUROfusion). Views and opinions expressed are however those of the author(s) only and do not necessarily reflect those of the European Union or the European Commission. Neither the European Union nor the European Commission can be held responsible for them. The ERO2.0 simulations utilised computing resources provided by the Science-IT project at Aalto University. Publisher Copyright: © 2022 The Author(s)
Keywords
Edge-localised mode, ERO2.0, Erosion, JET, JINTRAC, Spectroscopy, Tungsten
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Citation
Kumpulainen , H A , Groth , M , Brezinsek , S , Corrigan , G , Frassinetti , L , Harting , D , Koechl , F , Karhunen , J , Meigs , A G , O'Mullane , M , Romazanov , J & JET Contributors 2022 , ' ELM and inter-ELM tungsten erosion sources in high-power, JET ITER-like wall H-mode plasmas ' , Nuclear Materials and Energy , vol. 33 , 101264 , pp. 1-8 . https://doi.org/10.1016/j.nme.2022.101264