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Progress in HXR diagnostics at GOLEM and COMPASS tokamaks
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SYSNO ASEP 0558269 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Progress in HXR diagnostics at GOLEM and COMPASS tokamaks Author(s) Čeřovský, Jaroslav (UFP-V)
Ficker, Ondřej (UFP-V) ORCID
Svoboda, V. (CZ)
Tomešová, Eva (UFP-V) ORCID
Mlynář, Jan (UFP-V) RID
Čaloud, Jakub (UFP-V)
Weinzettl, Vladimír (UFP-V) RID, ORCID
Hron, Martin (UFP-V) RID, ORCIDNumber of authors 8 Article number C01033 Source Title Journal of Instrumentation. - : Institute of Physics Publishing - ISSN 1748-0221
Roč. 17, č. 1 (2022)Number of pages 12 s. Language eng - English Country GB - United Kingdom Keywords Gamma detectors (scintillators, CZT, HPGe, HgI etc.) ; Nuclear instruments and methods for hot plasma diagnostics Subject RIV BL - Plasma and Gas Discharge Physics OECD category Fluids and plasma physics (including surface physics) R&D Projects LM2018117 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) 8D15001 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) Method of publishing Limited access Institutional support UFP-V - RVO:61389021 UT WOS 000757148100015 EID SCOPUS 85123715022 DOI 10.1088/1748-0221/17/01/C01033 Annotation Scintillation detectors are widely used for hard X-ray spectroscopy and allow us to investigate the dynamics of runaway electrons in tokamaks. This diagnostic tool proved to be able to provide information about the energy or the number of runaway electrons. Presently it has been used for runaway studies at the GOLEM and the COMPASS tokamaks. The set of scintillation detectors used at both tokamaks was significantly extended and improved. Besides NaI(Tl) (2 2 inch) scintillation detectors, YAP(Ce) and CeBr3 were employed. The data acquisition system was accordingly improved and the data from scintillation detectors is collected with appropriate sampling rate (≈300 MHz) and sufficient bandwidth (≈100 MHz) to allow a pulse analysis. Up to five detectors can currently simultaneously monitor hard X-ray radiation at the GOLEM. The same scintillation detectors were also installed during the runaway electron campaign at the COMPASS tokamak. The aim of this contribution is to report progress in diagnostics of HXR radiation induced by runaway electrons at the GOLEM and the COMPASS tokamaks. The data collected during the 12th runaway electron campaign (2020) at COMPASS shows that count rates during typical low-density runaway electron discharges are in a range of hundreds of kHz and detected photon energies go up to 10 MeV (measured outside the tokamak hall). Acquired data from experimental campaigns from both machines will be discussed. Workplace Institute of Plasma Physics Contact Vladimíra Kebza, kebza@ipp.cas.cz, Tel.: 266 052 975 Year of Publishing 2023 Electronic address https://iopscience.iop.org/article/10.1088/1748-0221/17/01/C01033
Number of the records: 1