Number of the records: 1
Fast infrared thermography on the COMPASS tokamak.
- 1.
SYSNO ASEP 0481820 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Fast infrared thermography on the COMPASS tokamak. Author(s) Vondráček, Petr (UFP-V) RID, ORCID
Gauthier, C. (FR)
Ficker, Ondřej (UFP-V) ORCID
Hron, Martin (UFP-V) RID, ORCID
Imríšek, Martin (UFP-V) RID
Pánek, Radomír (UFP-V) RIDSource Title Fusion Engineering and Design. - : Elsevier - ISSN 0920-3796
Roč. 123, November (2017), s. 764-767Number of pages 4 s. Publication form Print - P Action SOFT 2016: Symposium on Fusion Technology /29./ Event date 05.09.2016 - 09.09.2016 VEvent location Prague Country CZ - Czech Republic Event type WRD Language eng - English Country CH - Switzerland Keywords Infrared thermography ; Heat flux decay length ; Runaway electrons ; Sawtooth Subject RIV JF - Nuclear Energetics OECD category Nuclear related engineering R&D Projects 8D15001 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) LM2015045 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) GA15-10723S GA ČR - Czech Science Foundation (CSF) Institutional support UFP-V - RVO:61389021 UT WOS 000418992000159 EID SCOPUS 85019160626 DOI 10.1016/j.fusengdes.2017.05.004 Annotation A new fast infrared camera was purchased on the COMPASS tokamak recently. It is equipped with a medium wavelength infrared (3-5 mm) InSb detector and is capable of reaching framerate up to 1.9 kHz in full frame acquisition mode (320 x 256 px.) and up to 90 kHz in sub-windowed mode (64 x 4 px.).
First experimental measurements of plasma heat flux to inner and outer wall limiters of the COMPASS tokamak using the new camera are presented. Time evolution of parallel heat flux during sawtooth instability is studied showing strong modulation of the heat flux absolute value whilst keeping constant its radial decay length. Fast modulation of outboard midplane limiter heat loading due to runaway electrons is also presented.
The camera will be part of a new fast divertor thermographic system with exceptional spatial resolution (similar to 0.6-1.3 mm/px. on the target plane, 0.04-0.14 mmipx. mapped to the outer midplane) with a possibility of measurements of radial profiles on the divertor with 320 x 4 px. with temporal resolution better than 20 mu s. A design of the foreseen optical divertor system is described together with a design of a special divertor graphite tile used for the IR thermography, that will allow in-situ surface emissivity calibration.Workplace Institute of Plasma Physics Contact Vladimíra Kebza, kebza@ipp.cas.cz, Tel.: 266 052 975 Year of Publishing 2018
Number of the records: 1