Počet záznamů: 1
The effect of high-flux H plasma exposure with simultaneous transient heat loads on tungsten surface damage and power handling
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SYSNO ASEP 0439649 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Článek ve WOS Název The effect of high-flux H plasma exposure with simultaneous transient heat loads on tungsten surface damage and power handling Tvůrce(i) van Eden, G.G. (NL)
Morgan, T.W. (NL)
van der Meiden, H.J. (NL)
Matějíček, Jiří (UFP-V) RID, ORCID
Chráska, Tomáš (UFP-V) RID, ORCID
Wirtz, M. (DE)
De Temmerman, G. (FR)Zdroj.dok. Nuclear Fusion. - : Institute of Physics Publishing - ISSN 0029-5515
Roč. 54, č. 12 (2014), s. 123010-123010Poč.str. 11 s. Forma vydání Tištěná - P Jazyk dok. eng - angličtina Země vyd. AT - Rakousko Klíč. slova ELMs ; tungsten ; thermal shock ; melting ; surface analysis ; laser ; hydrogen Vědní obor RIV JG - Hutnictví, kovové materiály CEP GA14-12837S GA ČR - Grantová agentura ČR Institucionální podpora UFP-V - RVO:61389021 UT WOS 000345579800016 EID SCOPUS 84914693453 DOI 10.1088/0029-5515/54/12/123010 Anotace The performance of the full-W ITER divertor may be significantly affected by the interplay between steady-state plasma exposure and transient events. To address this issue, the effect of a high-flux H plasma on the thermal shock response of W to ELM-like transients has been investigated. Transient heating of W targets is performed by means of a high-power Nd:YAG laser with simultaneous exposure to H plasma in the linear device Magnum-PSI. The effects of simultaneous exposure to laser and plasma have been compared to those sequentially and to laser only. Transient melting is found to be aggravated during plasma exposure and to occur at lower heat flux parameters. Roughness and grain growth are observed to be driven by peak temperature, rather than by the loading conditions. The temperature evolution of the W surface under a series of transients is recorded by fast infrared thermography. By accounting for changes in the reflectivity at the damaged surface as measured by ellipsometry Pracoviště Ústav fyziky plazmatu Kontakt Vladimíra Kebza, kebza@ipp.cas.cz, Tel.: 266 052 975 Rok sběru 2015
Počet záznamů: 1