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Experimental runaway electron current estimation in COMPASS tokamak
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SYSNO ASEP 0501873 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Experimental runaway electron current estimation in COMPASS tokamak Author(s) Vlainic, M. (RS)
Ficker, Ondřej (UFP-V) ORCID
Mlynář, Jan (UFP-V) RID
Tomešová, Eva (UFP-V) ORCIDNumber of authors 4 Article number 7010012 Source Title Atoms. - : MDPI - ISSN 2218-2004
Roč. 7, č. 1 (2019)Number of pages 12 s. Language eng - English Country CH - Switzerland Keywords runaway electron ; plasma current ; fusion plasma ; tokamak Subject RIV BL - Plasma and Gas Discharge Physics OECD category Fluids and plasma physics (including surface physics) R&D Projects LM2011021 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) 8D15001 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) Institutional support UFP-V - RVO:61389021 UT WOS 000464281700001 EID SCOPUS 85066464376 DOI 10.3390/atoms7010012 Annotation Runaway electrons present a potential threat to the safe operation of future nuclear fusion large facilities based on the tokamak principle (e.g., ITER). The article presents an implementation of runaway electron current estimations at COMPASS tokamak. The method uses a theoretical method developed by Fujita et al., with the difference in using experimental measurements from EFIT and Thomson scattering. The procedure was explained on the COMPASS discharge number 7298, which has a significant runaway electron population. Here, it was found that at least 4 kA of the plasma current is driven by the runaway electrons. Next, the method aws used on the set of plasma discharges with the variable electron plasma density. The difference in the plasma current was explained by runaway electrons, and their current was estimated using the aforementioned method. The experimental results are compared with the theory and simulation. The comparison presented some disagreements, showing the possible direction for the code development. Additional application on runaway electron energy limit is also addressed. Workplace Institute of Plasma Physics Contact Vladimíra Kebza, kebza@ipp.cas.cz, Tel.: 266 052 975 Year of Publishing 2019 Electronic address https://www.mdpi.com/2218-2004/7/1/12/htm
Number of the records: 1