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Investigation of transient melting of tungsten by ELMs in ASDEX Upgrade
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SYSNO ASEP 0482351 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Článek ve WOS Název Investigation of transient melting of tungsten by ELMs in ASDEX Upgrade Tvůrce(i) Krieger, K. (DE)
Sieglin, B. (DE)
Balden, M. (DE)
Coenen, J.W. (DE)
Göths, B. (DE)
Laggner, F. (AT)
de Marné, P. (DE)
Matthews, G.F. (GB)
Nille, D. (DE)
Rohde, V. (DE)
Dejarnac, Renaud (UFP-V) RID, ORCID
Faitsch, M. (DE)
Giannone, L. (DE)
Herrmann, A. (DE)
Horáček, Jan (UFP-V) RID, ORCID
Komm, Michael (UFP-V) RID, ORCID
Pitts, R.A. (FR)
Ratynskaia, S. (SE)
Thorén, E. (SE)
Tolias, P. (SE)Číslo článku 014030 Zdroj.dok. Physica Scripta. - : Institute of Physics Publishing - ISSN 0031-8949
T170, December (2017)Poč.str. 8 s. Forma vydání Tištěná - P Akce PFMC 2017: 16th International Conference on Plasma-Facing Materials and Components for Fusion Applications Datum konání 16.05.2017 - 19.05.2017 Místo konání Düsseldorf Země DE - Německo Typ akce WRD Jazyk dok. eng - angličtina Země vyd. SE - Švédsko Klíč. slova plasma-facing components ; tungsten ; melting ; edge-localized modes Vědní obor RIV BL - Fyzika plazmatu a výboje v plynech Obor OECD 1.3 Physical sciences Institucionální podpora UFP-V - RVO:61389021 UT WOS 000414120500030 DOI 10.1088/1402-4896/aa8be8 Anotace Repetitive melting of tungsten by power transients originating from edge localized modes (ELMs) has been studied in the tokamak experiment ASDEX Upgrade. Tungsten samples were exposed to H-mode discharges at the outer divertor target plate using the Divertor Manipulator II system. The exposed sample was designed with an elevated sloped surface inclined against the
incident magnetic field to increase the projected parallel power flux to a level were transient melting by ELMs would occur. Sample exposure was controlled by moving the outer strike point to the sample location. As extension to previous melt studies in the new experiment both the current flow from the sample to vessel potential and the local surface temperature were measured
with sufficient time resolution to resolve individual ELMs. The experiment provided for the first time a direct link of current flow and surface temperature during transient ELM events. This allows to further constrain the MEMOS melt motion code predictions and to improve the validation of its underlying model assumptions. Post exposure ex situ analysis of the retrieved samples confirms the decreased melt motion observed at shallower magnetic field line to surface angles compared to that at leading edges exposed to the parallel power flux.Pracoviště Ústav fyziky plazmatu Kontakt Vladimíra Kebza, kebza@ipp.cas.cz, Tel.: 266 052 975 Rok sběru 2018
Počet záznamů: 1