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Modelling of the effect of ELMs on fuel retention at the bulk W divertor of JET

JET Contributors; Heinola, K.; Ahlgren, T.; Brezinsek, S.; Vuoriheimo, T.; Wiesen, S.; Abduallev, S.; Abhangi, M.; Abreu, P.; Afzal, M.; Aggarwal, K. M.; Ahlgren, T.; Ahn, J. H.; Aho-Mantila, L.; Aiba, N.; Airila, M.; Albanese, R.; Aldred, V.; Alegre, D.; Alessi, E.; Aleynikov, P.; ... mehr

Abstract:
Effect of ELMs on fuel retention at the bulk W target of JET ITER-Like Wall was studied with multi-scale calculations. Plasma input parameters were taken from ELMy H-mode plasma experiment. The energetic intra-ELM fuel particles get implanted and create near-surface defects up to depths of few tens of nm, which act as the main fuel trapping sites during ELMs. Clustering of implantation-induced vacancies were found to take place. The incoming flux of inter-ELM plasma particles increases the different filling levels of trapped fuel in defects. The temperature increase of the W target during the pulse increases the fuel detrapping rate. The inter-ELM fuel particle flux refills the partially emptied trapping sites and fills new sites. This leads to a competing effect on the retention and release rates of the implanted particles. At high temperatures the main retention appeared in larger vacancy clusters due to increased clustering rate.

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Verlagsausgabe §
DOI: 10.5445/IR/1000119820
Veröffentlicht am 28.05.2020
Originalveröffentlichung
DOI: 10.1016/j.nme.2019.03.013
Scopus
Zitationen: 3
Web of Science
Zitationen: 3
Dimensions
Zitationen: 3
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Angewandte Thermofluidik (IATF)
Institut für Technische Physik (ITEP)
Publikationstyp Zeitschriftenaufsatz
Publikationsmonat/-jahr 05.2019
Sprache Englisch
Identifikator ISSN: 2352-1791
KITopen-ID: 1000119820
Erschienen in Nuclear materials and energy
Verlag Elsevier
Band 19
Seiten 397-402
Schlagwörter ELM, Fuel retention, Multi-scale computing, JET
Nachgewiesen in Dimensions
Web of Science
Scopus
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