Calibration of the ITER outer vessel steady-state magnetic sensors

0548224 - ÚFP 2022 RIV CH eng J - Journal Article
Entler, Slavomír - Ďuran, Ivan - Kocan, M. - Vayakis, G. - Sládek, Petr - Grover, Ondřej - Šebek, Josef - Výborný, Karel
Calibration of the ITER outer vessel steady-state magnetic sensors.
Fusion Engineering and Design. Roč. 168, July (2021), č. článku 112398. ISSN 0920-3796. E-ISSN 1873-7196
Grant - others:AV ČR(CZ) StrategieAV21/2
Program: StrategieAV
Institutional support: RVO:61389021 ; RVO:68378271
Keywords : Calibration * Hall sensors * iter * Magnetic diagnostics * ovss
OECD category: Fluids and plasma physics (including surface physics); Fluids and plasma physics (including surface physics) (FZU-D)
Impact factor: 1.905, year: 2021
Method of publishing: Limited access
https://www.sciencedirect.com/science/article/pii/S0920379621001745?via%3Dihub

The outer vessel steady-state magnetic field sensors (OVSS), a subsystem of the ITER magnetic diagnostics, consists of 60 units that will be installed on the vacuum vessel outer shell. Each OVSS unit features a pair of Hall sensors with a sensing layer made of bismuth and an onboard thermocouple. Prior to the installation of the sensors on ITER, OVSS will be subject to the complex calibration process designed to satisfy the ITER requirement for the measurement accuracy of 4 mT (2σ) in the range of the magnetic field from 0 to 2.5 T. The calibration process includes the calibration of the onboard thermocouple, sensor controller calibration, measurement of tilt of each Hall sensor with respect to the OVSS housing, and the measurement of the sensitivity of Hall sensors as a function of temperature and magnetic field for the range of ITER-relevant magnetic fields and temperatures. The expected calibration error projected to the magnetic field measurement of 2.5 mT will allow to meet the required measurement accuracy.
Permanent Link: http://hdl.handle.net/11104/0324323