Steady state magnetic sensors for ITER and beyond: Development and final design

0495626 - ÚFP 2019 RIV US eng J - Článek v odborném periodiku
Kocan, M. - Ďuran, Ivan - Entler, Slavomír - Vayakis, G. - Agostinetti, P. - Brombin, M. - Carmona, M.J. - Gambetta, M. - Jirman, T. - Marconato, N. - Moreau, P. - Peruzzo, S. - Spuig, P. - Walsh, M.
Steady state magnetic sensors for ITER and beyond: Development and final design.
Review of Scientific Instruments. Roč. 89, č. 10 (2018), č. článku 10J119. ISSN 0034-6748. E-ISSN 1089-7623
Institucionální podpora: RVO:61389021
Klíčová slova: Hall sensor * bismuth * magnetic field measurement * high temperature * ITER
Obor OECD: Fluids and plasma physics (including surface physics)
Impakt faktor: 1.587, rok: 2018
https://aip.scitation.org/doi/pdf/10.1063/1.5038871?class=pdf

The measurements of the magnetic field in tokamaks such as ITER and DEMO will be challenging due to the long pulse duration, high neutron flux, and elevated temperatures. The long duration of the plasma pulse makes standard techniques, such as inductive coils, prone to errors. At the same time, the hostile environment, with repairs possible only on blanket exchange, if at all, requires a robust magnetic sensor. This contribution presents the final design of novel, steady-state, magnetic sensors for ITER. A poloidal array of 60 sensors mounted on the vacuum vessel outer shell contributes to the measurement of the plasma current, plasma-wall clearance, low-frequency MHD modes and will allow for crosscheck with the outer-vessel inductive coils. Each sensor hosts a pair of bismuth Hall probes, themselves an outcome of extensive R&D, including neutron irradiations (to 1023 n/m2), temperature cycling tests (73-473 K) and tests at high magnetic field (to 12 T). A significant effort has been devoted to optimize the sensor housing by design and prototyping. The production version features an indium-filled cell for in situ recalibration of the onboard thermocouple, vital for the interpretation of the Hall sensor measurement.
Trvalý link: http://hdl.handle.net/11104/0288568