Status of steady-state magnetic diagnostic for ITER and outlook for possible materials of Hall sensors for DEMO

0517864 - ÚFP 2020 RIV NL eng J - Journal Article
Ďuran, Ivan - Entler, Slavomír - Grover, Ondřej - Bolshakova, I. - Výborný, Karel - Kocan, M. - Jirman, J. - Vayakis, G. - Vasyliev, O. - Radishevskyi, M. - Wang, Z. C. - Neumaier, D.
Status of steady-state magnetic diagnostic for ITER and outlook for possible materials of Hall sensors for DEMO.
Fusion Engineering and Design. Roč. 146, September (2019), s. 2397-2400. ISSN 0920-3796. E-ISSN 1873-7196
R&D Projects: GA MŠMT(CZ) 8D15001
EU Projects: European Commission(XE) 633053 - EUROfusion
Institutional support: RVO:61389021
Keywords : fusion * iter * demo * Hall sensors * Steady state magnetic diagnostic
OECD category: Fluids and plasma physics (including surface physics)
Impact factor: 1.692, year: 2019
Method of publishing: Limited access
https://www.sciencedirect.com/science/article/pii/S0920379619305344?via%3Dihub

The ITER outer vessel steady state (OVSS) magnetic diagnostic employing bismuth Hall sensors is presently being manufactured. New results on understanding and analytical description of a rather complex dependence of bismuth Hall coefficient on magnetic field and temperature are presented. Both, dependence of bismuth Hall coefficient on temperature and magnetic field is captured by a single analytical function while the error of the fit is comparable to the maximum allowed error of the ITER OVSS diagnostic. Results of FISPACT simulation of indium transmutation under ITER OVSS like neutron fluence are presented. Indium is used within OVSS sensors to provide periodic in-situ recalibration of embedded thermocouples. It is demonstrated that additional impurities introduced by indium transmutation does not compromise precision of the ITER OVSS diagnostic. Finally, outlook for Hall sensing materials (InAs, Bi, BiCu, Sb, Au-nanofilms, and graphene) potentially applicable for DEMO steady state sensors is given reviewing their properties in relation to the harsh environmental constraints posed to their implementation on DEMO reactor.
Permanent Link: http://hdl.handle.net/11104/0303124