Article (Scientific journals)
Magnetic Shielding Above 1 T at 20 K With Bulk, Large Grain YBCO Tubes Made by Buffer-aided Top Seeded Melt Growth
Wera, Laurent; Fagnard, Jean-François; Kumar, Numbury Devendra et al.
2017In IEEE Transactions on Applied Superconductivity, 27 (4)
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Keywords :
Superconductor; Magnetic shielding; YBCO
Abstract :
[en] YBCO tubes of ~ 10 mm diameter closed at one extremity were engineered by a Buffer-Aided Top Seeded Melt Growth fabrication process (BA-TSMG). These tubes can act as efficient “dc” magnetic shields and are observed to reduce axial flux densities of 1.5 T by a factor of 100 at 20 K. Such performances are comparable in magnitude to the record threshold inductions reported for bulk MgB2 and Bi-2212 materials at lower temperatures. Magnetic shielding measurements for open and closed tubes at 77 K also show that the presence of the cap improves substantially the shielding performance at the closed extremity since it reduces the penetration through the open end. This fabrication technique is extremely promising for shielding “dc” stray fields generated by HTS magnets operated in a temperature range obtained by cryocoolers, liquid hydrogen (20 K) or liquid neon (27 K).
Research center :
SUPRATECS - Services Universitaires pour la Recherche et les Applications Technologiques de Matériaux Électro-Céramiques, Composites, Supraconducteurs - ULiège
Disciplines :
Materials science & engineering
Electrical & electronics engineering
Author, co-author :
Wera, Laurent ;  Université de Liège > Dép. d'électric., électron. et informat. (Inst.Montefiore) > Dép. d'électric., électron. et informat. (Inst.Montefiore)
Fagnard, Jean-François  ;  Université de Liège > Dép. d'électric., électron. et informat. (Inst.Montefiore) > Applied and Computational Electromagnetics (ACE)
Kumar, Numbury Devendra;  University of Cambridge > Department of Engineering > Bulk Superconductivity Group
Shi, Yunhua;  University of Cambridge > Department of Engineering > Bulk Superconductivity Group
Vanderheyden, Benoît  ;  Université de Liège > Dép. d'électric., électron. et informat. (Inst.Montefiore) > Electronique et microsystèmes
Vanderbemden, Philippe  ;  Université de Liège > Dép. d'électric., électron. et informat. (Inst.Montefiore) > Capteurs et systèmes de mesures électriques
Language :
English
Title :
Magnetic Shielding Above 1 T at 20 K With Bulk, Large Grain YBCO Tubes Made by Buffer-aided Top Seeded Melt Growth
Publication date :
June 2017
Journal title :
IEEE Transactions on Applied Superconductivity
ISSN :
1051-8223
Publisher :
IEEE, New York, United States - New York
Volume :
27
Issue :
4
Peer reviewed :
Peer Reviewed verified by ORBi
Available on ORBi :
since 12 December 2016

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