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Deposition of impurity metals during campaigns with the JET ITER-like Wall

EUROfusion Consortium; Widdowson, A.; Goad, J. P.; Alves, E.; Baron-Wiechec, A.; Catarino, N.; Corregidor, V.; Heinola, K.; Krat, S.; Makepeace, C.; Matthews, G. F.; Mayer, M.; Mizohata, K.; Sertoli, M.; Abduallev, S.; Abhangi, M.; Abreu, P.; Afzal, M.; Aggarwal, K. M.; Ahlgren, T.; Ahn, J. H.; ... mehr

Abstract:
Post mortem analysis shows that mid and high atomic number metallic impurities are present in deposits on JET plasma facing components with the highest amount of Ni and W, and therefore the largest sink, being found at the top of the inner divertor. Sources are defined as “continuous” or “specific”, in that “continuous” sources arise from ongoing erosion from plasma facing surfaces and “specific” are linked with specific events which decrease over time until they no longer act as a source. This contribution evaluates the sinks and estimates sources, and the balance gives an indication of the dominating processes. Charge exchange neutral erosion is found to be the main source of nickel, whereas erosion of divertor plasma facing components is the main source of tungsten. Specific sources are shown to have little influence over the global mid- and high-Z impurity concentrations in deposits.

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Verlagsausgabe §
DOI: 10.5445/IR/1000119798
Veröffentlicht am 27.05.2020
Originalveröffentlichung
DOI: 10.1016/j.nme.2018.12.024
Scopus
Zitationen: 11
Web of Science
Zitationen: 7
Dimensions
Zitationen: 10
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Angewandte Thermofluidik (IATF)
Institut für Technische Physik (ITEP)
Publikationstyp Zeitschriftenaufsatz
Publikationsjahr 2019
Sprache Englisch
Identifikator ISSN: 2352-1791
KITopen-ID: 1000119798
Erschienen in Nuclear materials and energy
Verlag Elsevier
Band 19
Seiten 218-224
Bemerkung zur Veröffentlichung Kollaboration: JET Contributors, Culham Sci Ctr
Schlagwörter JET, Erosion, Deposition, Impurities, Nickel ,Tungsten
Nachgewiesen in Web of Science
Dimensions
Scopus
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