Počet záznamů: 1
In-situ assessment of the emissivity of tungsten plasma facing components of the WEST tokamak
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SYSNO ASEP 0539284 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Článek ve WOS Název In-situ assessment of the emissivity of tungsten plasma facing components of the WEST tokamak Tvůrce(i) Gaspar, J. (FR)
Aumeunier, M.-H. (FR)
Le Bohec, S. (FR)
Rigollet, F. (FR)
Brezinsek, S. (DE)
Corre, Y. (FR)
Courtois, X. (FR)
Dejarnac, Renaud (UFP-V) RID, ORCID
Diez, M. (FR)
Dubus, G. (FR)
Fedorczak, N. (FR)
Houry, M. (FR)
Moncada, V. (FR)
Moreau, P. (FR)
Pocheau, C. (FR)
Talatizi, C. (FR)
Tsitrone, E. (FR)Celkový počet autorů 17 Číslo článku 100851 Zdroj.dok. Nuclear Materials and Energy. - : Elsevier
Roč. 25, December (2020)Poč.str. 6 s. Jazyk dok. eng - angličtina Země vyd. NL - Nizozemsko Klíč. slova heat-flux estimation ; infrared thermography ; divertor ; W emissivity ; Infrared thermography ; Heat flux decay width ; In-situ measurement Vědní obor RIV BL - Fyzika plazmatu a výboje v plynech Obor OECD Fluids and plasma physics (including surface physics) Způsob publikování Open access Institucionální podpora UFP-V - RVO:61389021 UT WOS 000600734700056 EID SCOPUS 85097352807 DOI 10.1016/j.nme.2020.100851 Anotace In this paper, a method was developed to estimate in-situ the emissivity of the W-coated graphite divertor tiles in the WEST tokamak. This method is based on the double heating method and take advantages of the divertor temperature increase after successive plasma experiments due to the inertial behavior of the plasma facing components. Photonic calculations have been used to disentangle the emitted and the reflected parts in the measured radiances from the infrared system. The uncertainty as well as the robustness of the method have been investigated thanks to the wide IR and thermocouple coverage in the WEST divertor. The results show strong variation of the emissivity along the divertor W surfaces with a factor 4 variation after the experimental campaigns including 18.3 GJ and about 21 000 s of cumulated injected energy and duration, respectively. Finally, the implication of a non-uniform emissivity on heat flux estimation from IR measurements is discussed, showing that non-uniform emissivity must be considered to obtain an accurate heat flux decay width. Pracoviště Ústav fyziky plazmatu Kontakt Vladimíra Kebza, kebza@ipp.cas.cz, Tel.: 266 052 975 Rok sběru 2021 Elektronická adresa https://www.sciencedirect.com/science/article/pii/S2352179120301198?via%3Dihub
Počet záznamů: 1