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Physics conclusions in support of ITER W divertor monoblock shaping

Pitts, R. A.; Bardin, S.; Bazylev, B. 1; den Berg, M. A. van; Bunting, P.; Carpentier-Chouchana, S.; Coenen, J. W.; Corre, Y.; Dejarnac, R.; Escourbiac, F.; Gaspar, J.; Gunn, J. P.; Hirai, T.; Hong, S-H.; Horacek, J.; Iglesias, D.; Komm, M.; Krieger, K.; Lasnier, C.; ... mehr


The key remaining physics design issue for the ITER tungsten (W) divertor is the question of monoblock (MB) front surface shaping in the high heat flux target areas of the actively cooled targets. Engineering tolerance specifications impose a challenging maximum radial step between toroidally adjacent MBs of 0.3 mm. Assuming optical projection of the parallel heat loads, magnetic shadowing of these edges is required if quasi-steady state melting is to be avoided under certain conditions during burning plasma operation and transiently during edge localized mode (ELM) or disruption induced power loading. An experiment on JET in 2013 designed to investigate the consequences of transient W edge melting on ITER, found significant deficits in the edge power loads expected on the basis of simple geometric arguments, throwing doubt on the understanding of edge loading at glancing field line angles. As a result, a coordinated multi-experiment and simulation effort was initiated via the International Tokamak Physics Activity (ITPA) and through ITER contracts, aimed at improving the physics basis supporting a MB shaping decision from the point of view both of edge power loading and melt dynamics. ... mehr

Verlagsausgabe §
DOI: 10.5445/IR/1000076499
Veröffentlicht am 14.11.2017
DOI: 10.1016/j.nme.2017.03.005
Zitationen: 124
Zitationen: 126
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Neutronenphysik und Reaktortechnik (INR)
Publikationstyp Zeitschriftenaufsatz
Publikationsmonat/-jahr 08.2017
Sprache Englisch
Identifikator ISSN: 2352-1791
KITopen-ID: 1000076499
HGF-Programm 31.03.06 (POF III, LK 01) Brutblanket-Entwicklung
Erschienen in Nuclear materials and energy
Verlag Elsevier
Band 12
Seiten 60–74
Schlagwörter ITER; Tungsten; Divertor; Shaping; Melting; MEMOS
Nachgewiesen in Scopus
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