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Ion temperature measurements in the tokamak scrape-off layer with high temporal resolution
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SYSNO ASEP 0555703 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Ion temperature measurements in the tokamak scrape-off layer with high temporal resolution Author(s) Adámek, Jiří (UFP-V) RID, ORCID
Cipciar, A. (SK)
Devitre, A. (US)
Horáček, Jan (UFP-V) RID, ORCID
Cavalier, Jordan (UFP-V) RID, ORCID
Komm, Michael (UFP-V) RID, ORCID
Krbec, Jaroslav (UFP-V)
Tichý, M. (CZ)
Trunec, D. (CZ)
Böhm, Petr (UFP-V) RID
Pánek, Radomír (UFP-V) RIDNumber of authors 11 Article number 036023 Source Title Nuclear Fusion. - : Institute of Physics Publishing - ISSN 0029-5515
Roč. 61, č. 3 (2021)Number of pages 6 s. Language eng - English Country AT - Austria Keywords ion temperature ; L-mode ; magnetic-confinement fusion ; plasma Subject RIV BL - Plasma and Gas Discharge Physics OECD category Fluids and plasma physics (including surface physics) R&D Projects EF16_019/0000768 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) GA20-28161S GA ČR - Czech Science Foundation (CSF) GA19-00579S GA ČR - Czech Science Foundation (CSF) Method of publishing Limited access Institutional support UFP-V - RVO:61389021 UT WOS 000619572200001 EID SCOPUS 85102184920 DOI 10.1088/1741-4326/abd41d Annotation We present a uniquely fast (10 μs) ion temperature measurements in the tokamak edge plasma. Our approach is based on the sweeping of a ball-pen probe, where the ion temperature is obtained by fitting the electron branch of the corresponding I-V characteristic. We have performed measurements on the COMPASS tokamak during L-mode discharge. The temperature histograms reveal a non-Gaussian shape with a high-temperature tail peaking at low values. The fitted values of fast I-V measurements can be used to reconstruct (emulate) the slow swept I-V characteristic of a retarding field analyzer. The resulting ion temperature profile is nearly flat and provides a ratio of ion to electron temperature close to 1-2 in the vicinity of the last closed flux surface during L-mode discharges, as observed on other tokamaks. Workplace Institute of Plasma Physics Contact Vladimíra Kebza, kebza@ipp.cas.cz, Tel.: 266 052 975 Year of Publishing 2022 Electronic address https://iopscience.iop.org/article/10.1088/1741-4326/abd41d
Number of the records: 1