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Poster (Scientific congresses and symposiums)
Numerical modelling of the magneto-thermal effects of a transverse AC magnetic field on the axial magnetization of a bulk superconducting cylinder
Kirsch, Sébastien; Fagnard, Jean-François; Vanderbemden, Philippe et al.
2013EUCAS 2013 - European Conference on Applied Superconductivity
 

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Abstract :
[en] We study the decrease of the magnetization of a bulk superconducting sample when it is subjected to a perpendicular AC magnetic field (crossed field" configuration). The effect of a transverse AC magnetic field on the permanent magnetization of the supercon- ductor are twofold: (i) the superconducting currents are redistributed in the supercon- ductor, and (ii) AC losses are generated, which may locally increase the temperature and degrade the superconducting properties. These two phenomena (current redistribution and losses) are differently affected by the frequency and the amplitude of the transverse magnetic field. The goal of this study is to identify the sets of experimental conditions that accentuate each of these two effects, and more specifically to assess their importance in crossed field experiments being carried in our research group. The cylindrical superconductor is surrounded by a metallic sheath and is initially magnetized along its symmetry axis. The magneto-thermal modelling is carried out by using a finite element method (FEM) implemented in a open source package (GetDP). The validity of these simulations is verified by comparing modelling results with experi- mental data obtained for small amplitudes and large numbers of cycles for the transverse magnetic field.
Disciplines :
Electrical & electronics engineering
Author, co-author :
Kirsch, Sébastien;  Université de Liège - ULiège > Dép. d'électr., électron. et informat. (Inst. Montefiore)
Fagnard, Jean-François  ;  Université de Liège - ULiège > Dép. d'électric., électron. et informat. (Inst.Montefiore)
Vanderbemden, Philippe  ;  Université de Liège - ULiège > Dép. d'électric., électron. et informat. (Inst.Montefiore) > Capteurs et systèmes de mesures électriques
Vanderheyden, Benoît  ;  Université de Liège - ULiège > Dép. d'électric., électron. et informat. (Inst.Montefiore) > Electronique et microsystèmes
Language :
English
Title :
Numerical modelling of the magneto-thermal effects of a transverse AC magnetic field on the axial magnetization of a bulk superconducting cylinder
Publication date :
September 2013
Event name :
EUCAS 2013 - European Conference on Applied Superconductivity
Event place :
Genoa, Italy
Event date :
September 15-19, 2013
Audience :
International
Name of the research project :
ARC 11/16-03
Funders :
FWB - Fédération Wallonie-Bruxelles [BE]
Available on ORBi :
since 11 January 2018

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