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Determination of tungsten sources in the JET-ILW divertor by spectroscopic imaging in the presence of a strong plasma continuum

JET Contributors; Huber, A.; Brezinsek, S.; Kirschner, A.; Strom, P.; Sergienko, G.; Huber, V.; Borodkina, I.; Douai, D.; Jachmich, S.; Linsmeier, C. H.; Lomanowski, B.; Matthews, G. F.; Mertens, P. H.; Abduallev, S.; Abhangi, M.; Abreu, P.; Afzal, M.; Aggarwal, K. M.; ... mehr


The identification of the sources of atomic tungsten and the measurement of their radiation distribution in front of all plasma-facing components has been performed in JET with the help of two digital cameras with the same two-dimensional view, equipped with interference filters of different bandwidths centred on theW I (400.88 nm) emission line. A new algorithm for the subtraction of the continuum radiation was successfully developed and is now used to evaluate the W erosion even in the inner divertor region where the strong recombination emission is dominating over the tungsten emission. Analysis of W sputtering and W redistribution in the divertor by video imaging spectroscopy with high spatial resolution for three different magnetic configurations was performed. A strong variation of the emission of the neutral tungsten in toroidal direction and corresponding W erosion has been observed. It correlates strongly with the wetted area with a maximal W erosion at the edge of the divertor tile.

Verlagsausgabe §
DOI: 10.5445/IR/1000119908
Veröffentlicht am 29.05.2020
DOI: 10.1016/j.nme.2018.12.009
Zitationen: 17
Zitationen: 17
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Angewandte Thermofluidik (IATF)
Institut für Technische Physik (ITEP)
Publikationstyp Zeitschriftenaufsatz
Publikationsmonat/-jahr 01.2019
Sprache Englisch
Identifikator ISSN: 2352-1791
KITopen-ID: 1000119908
Erschienen in Nuclear materials and energy
Verlag Elsevier
Band 18
Seiten 118-124
Schlagwörter Tungsten erosion, Tungsten imaging spectroscopy, W Divertor, JET-ILW, PSI, PFC
Nachgewiesen in Web of Science
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