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Ceramic‐chromium hall sensors for environments with high temperatures and neutron radiation
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SYSNO ASEP 0543097 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Ceramic‐chromium hall sensors for environments with high temperatures and neutron radiation Author(s) Entler, Slavomír (UFP-V) ORCID
Šobáň, Zbyněk (FZU-D) RID, ORCID
Ďuran, Ivan (UFP-V) RID, ORCID
Kovařík, Karel (UFP-V) RID, ORCID
Výborný, Karel (FZU-D) RID, ORCID
Šebek, Josef (FZU-D) RID
Tazlaru, S. (CZ)
Střeleček, J. (CZ)
Sládek, Petr (UFP-V)Number of authors 9 Article number 721 Source Title Sensors. - : MDPI
Roč. 21, č. 3 (2021), s. 1-12Number of pages 12 s. Language eng - English Country CH - Switzerland Keywords Chromium ; demo ; Fusion ; Hall sensors ; High temperature ; Metal ; Nanolayer ; Nu-clear ; Radiation ; Resistant Subject RIV BL - Plasma and Gas Discharge Physics OECD category Fluids and plasma physics (including surface physics) Subject RIV - cooperation Institute of Physics - Nuclear Energetics R&D Projects 8D15001 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) EF16_019/0000768 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) LM2018110 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) Method of publishing Open access Institutional support UFP-V - RVO:61389021 ; FZU-D - RVO:68378271 UT WOS 000615496300001 EID SCOPUS 85099664051 DOI 10.3390/s21030721 Annotation Ceramic‐chromium Hall sensors represent a temperature and radiation resistant alternative to Hall sensors based on semiconductors. Demand for these sensors is presently motivated by the ITER and DEMO nuclear fusion projects. The developed ceramic‐chromium Hall sensors were tested up to a temperature of 550 °C and a magnetic field of 14 T. The magnitude of the sensitivity of the tested sensor was 6.2 mV/A/T at 20 °C and 4.6 mV/A/T at 500 °C. The sensitivity was observed to be weakly dependent on a temperature above 240 °C with an average temperature coefficient of 0.014%/°C and independent of the magnetic field with a relative average deviation below the measurement accuracy of 0.086%. A simulation of a neutron‐induced transmutation was performed to assess changes in the composition of the chromium. After 5.2 operational years of the DEMO fusion reactor, the transmuted fraction of the chromium sensitive layer was found to be 0.27% at the most exposed sensor location behind the divertor cassette with a neutron fluence of 6.08 × 10 n/m . The ceramic‐chromium Hall sensors show the potential to be suitable magnetic sensors for environments with high temperatures and strong neutron radiation. 25 2 Workplace Institute of Plasma Physics Contact Vladimíra Kebza, kebza@ipp.cas.cz, Tel.: 266 052 975 Year of Publishing 2022 Electronic address https://www.mdpi.com/1424-8220/21/3/721
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