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Runaway electron diagnostics for the COMPASS tokamak using EC emission
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SYSNO ASEP 0531279 Document Type C - Proceedings Paper (int. conf.) R&D Document Type Conference Paper Title Runaway electron diagnostics for the COMPASS tokamak using EC emission Author(s) Farník, Michal (UFP-V)
Urban, Jakub (UFP-V) RID
Zajac, Jaromír (UFP-V) RID
Bogár, Ondrej (UFP-V) ORCID
Ficker, Ondřej (UFP-V) ORCID
Tomešová, Eva (UFP-V) ORCID
Mlynář, Jan (UFP-V) RID
Čeřovský, Jaroslav (UFP-V)
Varavin, Mykyta (UFP-V)
Weinzettl, Vladimír (UFP-V) RID, ORCID
Hron, Martin (UFP-V) RID, ORCIDNumber of authors 11 Source Title 45th EPS Conference on Plasma Physics, EPS 2018. - Mulhouse : European Physical Society, 2018 - ISBN 979-10-96389-08-7 Pages roč. 45, july (2018), s. 217-220 Number of pages 4 s. Publication form Online - E Action 45th European Physical Society Conference on Plasma Physiics Event date 02.07.2018 - 06.07.2018 VEvent location Praha Country CZ - Czech Republic Event type WRD Language eng - English Country FR - France Keywords runaway electrons ; COMPASS ; tokamak Subject RIV BL - Plasma and Gas Discharge Physics OECD category Fluids and plasma physics (including surface physics) R&D Projects LM2015045 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) LG14002 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) 8D15001 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) GA18-02482S GA ČR - Czech Science Foundation (CSF) Institutional support UFP-V - RVO:61389021 EID SCOPUS 85057882782 DOI 10.1051/epjconf/201920303006 Annotation An electron cyclotron emission (ECE) diagnostic of suprathermal electrons was utilised for runaway electron (RE) experiments purposes in the COMPASS tokamak. Our vertical ECE (V-ECE) system consists of a 16-channel heterodyne radiometer and an E-band horn antenna with a 76.5-88 GHz frequency range front-end. Simulations used for the design of the diagnostic showed a possibility of detecting the emission of low-energy (50-140 keV) runaway electrons. We realized measurements with both extraordinary (X-) and ordinary (O-) mode linear polarizations. The amplitudes of the X-mode and O-mode signals are similar, which can be explained by depolarised reflected radiation. V-ECE measurements in low-density flattop discharges and in discharges with massive gas injections of high-Z elements show correlations with other RE diagnostics. Our results are in the agreement with the principles of the primary runaway generation mechanisms. Workplace Institute of Plasma Physics Contact Vladimíra Kebza, kebza@ipp.cas.cz, Tel.: 266 052 975 Year of Publishing 2021 Electronic address https://www.epj-conferences.org/articles/epjconf/pdf/2019/08/epjconf_ec2018_03006.pdf
Number of the records: 1