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Recent improvement of the design of the ITER steady-state magnetic sensors
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SYSNO ASEP 0538555 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Recent improvement of the design of the ITER steady-state magnetic sensors Author(s) Entler, Slavomír (UFP-V) ORCID
Kocan, M. (FR)
Ďuran, Ivan (UFP-V) RID, ORCID
Vayakis, G. (FR)
Lucca, G. (ES)
Vigano, F. (IT)
Cantu, P. (FR)Number of authors 7 Source Title IEEE Transactions on Plasma Science. - : Institute of Electrical and Electronics Engineers - ISSN 0093-3813
Roč. 46, č. 5 (2018), s. 1276-1280Number of pages 5 s. Language eng - English Country US - United States Keywords Calibration ; Hall effect devices ; iter ; magnetic field measurement ; measurement errors Subject RIV BL - Plasma and Gas Discharge Physics OECD category Fluids and plasma physics (including surface physics) Method of publishing Limited access Institutional support UFP-V - RVO:61389021 UT WOS 000431521700031 EID SCOPUS 85041689749 DOI 10.1109/TPS.2018.2795243 Annotation A recent improvement of the design of the ITER outer vessel steady-state magnetic field sensors (OVSS) is presented. OVSS features a pair of Hall sensors with a sensing layer made of bismuth. Sixty OVSS will be installed on the ITER vacuum vessel outer skin to perform an absolute measurement of magnetic field. The bismuth Hall sensor measurement is temperature dependent, and the maximum allowed OVSS error of 4-mT limits the error of the measurement of the Hall sensor temperature by an on-board thermocouple to be less than 0.28 °C. This error consists of the temperature difference between the thermocouple and Hall sensors, thermocouple calibration error, and thermocouple measurement error. The improved design of the sensor housing reduces the temperature difference between the thermocouple and the Hall sensors bellow 0.04 °C. Procedures of the calibration prior installation and in situ calibration will allow calibrating the on-board thermocouple with the error less than 0.06 °C. The thermocouple measurement error limit was determined as 0.27 °C in which case OVSS meets the maximum allowed error. Workplace Institute of Plasma Physics Contact Vladimíra Kebza, kebza@ipp.cas.cz, Tel.: 266 052 975 Year of Publishing 2021 Electronic address https://ieeexplore.ieee.org/document/8278837
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