Počet záznamů: 1
Divertor infrared thermography on COMPASS
- 1.
SYSNO ASEP 0544048 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Článek ve WOS Název Divertor infrared thermography on COMPASS Tvůrce(i) Vondráček, Petr (UFP-V) RID, ORCID
Gauthier, E. (FR)
Grof, M. (CZ)
Hron, Martin (UFP-V) RID, ORCID
Komm, Michael (UFP-V) RID, ORCID
Pánek, Radomír (UFP-V) RIDCelkový počet autorů 6 Zdroj.dok. Fusion Engineering and Design. - : Elsevier - ISSN 0920-3796
Roč. 146, September (2019), s. 1003-1006Poč.str. 4 s. Jazyk dok. eng - angličtina Země vyd. CH - Švýcarsko Klíč. slova Infra-red thermography ; Scrape-off layer ; Tokamak Vědní obor RIV BL - Fyzika plazmatu a výboje v plynech Obor OECD Fluids and plasma physics (including surface physics) CEP 8D15001 GA MŠMT - Ministerstvo školství, mládeže a tělovýchovy LM2015045 GA MŠMT - Ministerstvo školství, mládeže a tělovýchovy GA16-14228S GA ČR - Grantová agentura ČR EF16_019/0000768 GA MŠMT - Ministerstvo školství, mládeže a tělovýchovy Způsob publikování Omezený přístup Institucionální podpora UFP-V - RVO:61389021 UT WOS 000488307400225 EID SCOPUS 85061580319 DOI https://doi.org/10.1016/j.fusengdes.2019.01.142 Anotace A new fast divertor infra-red thermography system was put into operation on COMPASS. It provides full radial coverage of the bottom open divertor with pixel resolution ∼0.6–1.1 mm/px on the target surface and temporal resolution better than 20 μs. The system consists of fast IR camera TELOPS Fast-IR 2K placed in a magnetic shielding box, a positionable holder, a 1 m long IR endoscope consisting of 14 Ge and Si lenses securing off-axis view from an upper inner vertical port and a special graphite divertor tile optimized for IR thermography. The tile is equipped with a heating system allowing tile preheating up to 250 °C. Embedded thermoresistors and a calibration target (a deep narrow hole acting as a black body radiator) allows in-situ calibration of the system including estimation of the target surface emissivity. Furthermore, a roof-top shaped structure on top of the tile increases magnetic field incidence angles above 3 degrees. Laboratory tests of the system performed during its commissioning are presented. The global transmission of the optical system was found to be τ ≈ 40–50%. Poor spatial resolution compared to the design value was observed. Too large surface error of individual lenses was identified as the main cause and re-manufacturing of the most critical lens was suggested. First experimental results obtained using the IR system are presented: divertor heat flux profiles in L-mode with the heat flux decay length λ qomp =2.1−3.3 mm and average H-mode heat flux profiles in an inter-ELM period and during an ELM heat flux maximum with λ qomp ≈0.6 mm and λ qomp ≈6.7 mm, respectively. Pracoviště Ústav fyziky plazmatu Kontakt Vladimíra Kebza, kebza@ipp.cas.cz, Tel.: 266 052 975 Rok sběru 2022 Elektronická adresa https://www.sciencedirect.com/science/article/pii/S0920379619301607?via%3Dihub
Počet záznamů: 1