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Modeling of COMPASS tokamak divertor liquid metal experiments
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SYSNO ASEP 0536520 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Modeling of COMPASS tokamak divertor liquid metal experiments Author(s) Horáček, Jan (UFP-V) RID, ORCID
Dejarnac, Renaud (UFP-V) RID, ORCID
Cecrdle, J. (CZ)
Tskhakaya, David (UFP-V) ORCID
Vertkov, A. (RU)
Cavalier, Jordan (UFP-V) RID, ORCID
Vondráček, Petr (UFP-V) RID, ORCID
Jeřáb, Martin (UFP-V) ORCID
Bartoň, Petr (UFP-V)
Van Oost, G. (BE)
Hron, Martin (UFP-V) RID, ORCID
Weinzettl, Vladimír (UFP-V) RID, ORCID
Šesták, David (UFP-V) RID
Lukeš, S. (CZ)
Adámek, Jiří (UFP-V) RID, ORCID
Prishvitsin, A. (RU)
Iafratti, M. (IT)
Gasparyan, A.A. (RU)
Vasina, Y. (RU)
Naydenkova, Diana (UFP-V) RID, ORCID
Seidl, Jakub (UFP-V) RID
Gauthier, E. (FR)
Mazzitelli, G. (IT)
Komm, Michael (UFP-V) RID, ORCID
Gerardin, Jonathan (UFP-V) ORCID
Varju, Jozef (UFP-V) ORCID
Tomeš, Matěj (UFP-V)
Entler, Slavomír (UFP-V) ORCID
Hromádka, Jakub (UFP-V)
Pánek, Radomír (UFP-V) RIDNumber of authors 30 Article number 100860 Source Title Nuclear Materials and Energy. - : Elsevier
Roč. 25, December (2020)Number of pages 8 s. Language eng - English Country NL - Netherlands Keywords Divertor ; Liquid metals ; Plasma facing components ; Tokamak Subject RIV BL - Plasma and Gas Discharge Physics OECD category Fluids and plasma physics (including surface physics) R&D Projects LM2018117 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) 8D15001 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) GA20-28161S GA ČR - Czech Science Foundation (CSF) Method of publishing Open access Institutional support UFP-V - RVO:61389021 UT WOS 000600734700062 EID SCOPUS 85097536057 DOI 10.1016/j.nme.2020.100860 Annotation Two small liquid metal targets based on the capillary porous structure were exposed to the divertor plasma of the tokamak COMPASS. The first target was wetted by pure lithium and the second one by a lithium-tin alloy, both releasing mainly lithium atoms (sputtering and evaporation) when exposed to plasma. Due to poorly conductive target material and steep surface inclination (implying the surface-perpendicular plasma heat flux 12–17 MW/m2) for 0.1–0.2 s, the LiSn target has reached 900 °C under ELMy H-mode. A model of heat conduction is developed and serves to evaluate the lithium sputtering and evaporation and, thus, the surface cooling by the released lithium and consequent radiative shielding. In these conditions, cooling of the surface by the latent heat of vapor did not exceed 1 MW/m2. About 1019 lithium atoms were evaporated (comparable to the COMPASS 1 m3 plasma deuterium content), local Li pressure exceeded the deuterium plasma pressure. Since the radiating Li vapor cloud spreads over a sphere much larger than the hot spot, its cooling effect is negligible (0.2 MW/m2). We also predict zero lithium prompt redeposition, consistent with our observation. Workplace Institute of Plasma Physics Contact Vladimíra Kebza, kebza@ipp.cas.cz, Tel.: 266 052 975 Year of Publishing 2021 Electronic address https://www.sciencedirect.com/science/article/pii/S2352179120301277?via%3Dihub
Number of the records: 1