ORBi: Lousberg Grégory - Pulsed-field magnetization of drilled bulk high-temperature superconductors: flux front propagation in the volume and on the surface

Reference : Pulsed-field magnetization of drilled bulk high-temperature superconductors: flux front ...


	Document type :	Scientific journals : Article
	Discipline(s) :	Engineering, computing & technology : Electrical & electronics engineering Physical, chemical, mathematical & earth Sciences : Physics
	To cite this reference:	http://hdl.handle.net/2268/32197

Title :	Pulsed-field magnetization of drilled bulk high-temperature superconductors: flux front propagation in the volume and on the surface
Language :	English
Author, co-author :	Lousberg, Grégory [Université de Liège - ULg > Dép. d'électric., électron. et informat. (Inst.Montefiore) > Electronique et microsystèmes >]
	Fagnard, Jean-François [Ecole Royale Militaire (Belgique) - ERM > > > >]
	Haanappel, Evert [IPBS-UPS/CNRS UMR5089 > UPS, IPBS, Université de Toulouse > > >]
	Chaud, Xavier [Centre National de la Recherche Scientifique - CNRS > CRETA > > >]
	Ausloos, Marcel [Université de Liège - ULg > Département de physique > Département de physique >]
	Vanderheyden, Benoît [Université de Liège - ULg > Dép. d'électric., électron. et informat. (Inst.Montefiore) > Electronique et microsystèmes >]
	Vanderbemden, Philippe [Université de Liège - ULg > Dép. d'électric., électron. et informat. (Inst.Montefiore) > Capteurs et systèmes de mesures électriques >]
Publication date :	Dec-2009
Journal title :	Superconductor Science and Technology
Publisher :	Institute of Physics
Issue/season :	22
Pages :	125026
Audience :	International
ISSN :	0953-2048
City :	Bristol
Country :	United Kingdom
Abstract :	[en] We present a method for characterizing the propagation of the magnetic flux in an artificially drilled bulk high-temperature superconductor (HTS) during pulsed-field magnetization. As the magnetic pulse penetrates the cylindrical sample, the magnetic flux density is measured simultaneously in 16 holes by means of microcoils that are placed across the median plane, i.e. at an equal distance from the top and bottom surfaces, and close to the surface of the sample. We discuss the time evolution of the magnetic flux density in the holes during a pulse and measure the time taken by the external magnetic flux to reach each hole. Our data show that the flux front moves faster in the median plane than on the surface when penetrating the sample edge; it then proceeds faster along the surface than in the bulk as it penetrates the sample further. Once the pulse is over, the trapped flux density inside the central hole is found to be about twice as large in the median plane as on the surface. This ratio is confirmed by modelling.
Research units :	Services Universitaires Pour la Recherche et les Applications Technologiques de Matériaux Électro-Céramiques, Composites, Supraconducteurs - SUPRATECS
Funders :	Fonds de la Recherche Scientifique (Communauté française de Belgique) - F.R.S.-FNRS
Target :	Researchers ; Professionals
Permalink :	http://hdl.handle.net/2268/32197
DOI :	10.1088/0953-2048/22/12/125026
Other URL :	http://www.iop.org/EJ/abstract/0953-2048/22/12/125026

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Open access	PulsedField77K_FinalVersion.pdf	No commentary	Author postprint	785.54 kB	View/Open

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