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Laurent Wera - Publications ORBI
Wera, L. (2017). Experimental study of methods to increase the shielded volume in passive superconducting magnetic screens. Unpublished doctoral thesis, Université de Liège, ​Liège, ​​Belgique.
This thesis is dedicated to the experimental study of methods to increase the shielded volume in passive magnetic shields made of high temperature superconductors (HTS). Two main approaches are investigated ...
Wera, L., Fagnard, J.-F., Kumar, N. D., Shi, Y., Vanderheyden, B., & Vanderbemden, P. (2017). Magnetic Shielding Above 1 T at 20 K With Bulk, Large Grain YBCO Tubes Made by Buffer-aided Top Seeded Melt Growth. IEEE Transactions on Applied Superconductivity, 27(4).
Peer reviewed (verified by ORBi)
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 ...
Wera, L., Fagnard, J.-F., Kumar, N. D., Shi, Y., Vanderheyden, B., & Vanderbemden, P. (2016, September 07). Magnetic shielding above 1 T at 20 K with bulk, large grain YBCO tubes made by Buffer-aided Top Seeded Melt Growth. Poster session presented at Applied Superconductivity Conference ASC 2016, Denver, USA.
A superconducting tube can be used as an efficient magnetic shield. The best shielding performance levels are usually achieved when the tube is closed at one or both extremities. The purpose of the present ...
Philippe, M., Fagnard, J.-F., Wera, L., Morita, M., Nariki, S., Teshima, H., Caps, H., Vanderheyden, B., & Vanderbemden, P. (2016). Influence of crossed fields in structures combining large grain, bulk (RE)BCO superconductors and soft ferromagnetic discs. Journal of Physics: Conference Series, 695, 012003.
Peer reviewed (verified by ORBi)
Bulk (RE)BCO superconductors are able to trap record magnetic fields and can be used as powerful permanent magnets in various engineering applications such as rotating machines and magnetic bearings. When ...
Wera, L., Fagnard, J.-F., Hogan, K., Vanderheyden, B., & Vanderbemden, P. (2016). Magnetic Shielding with Bulk High Temperature Superconductors: Improvement of the Shielded Volume in Hollow Cylinders. In M., Muralidhar (Ed.), Superconductivity: Applications Today and Tomorrow (pp. 95-114). New York: Nova Science.
Peer reviewed
The superconducting HTS hollow cylinder has been one of the first geometries to demonstrate its utility as an efficient passive magnetic shield, and particularly for DC magnetic shielding. The shielding ...
Wera, L., Fagnard, J.-F., Hogan, K., Vanderheyden, B., & Vanderbemden, P. (2015, September 09). Design of the superconducting end caps of a tubular magnetic shield. Poster session presented at EUropean Conference on Applied Superconductivity EUCAS 2015.
Shielding a sensitive device against DC or AC stray magnetic fields can be realized very efficiently with high-Tc superconductors. A simple magnetic shield can be obtained with a tube enclosing the device ...
Philippe, M., Ainslie, M. D., Wera, L., Fagnard, J.-F., Dennis, A., Shi, Y., Cardwell, D. A., Vanderheyden, B., & Vanderbemden, P. (2015). Influence of soft ferromagnetic sections on the magnetic flux density profile of a large grain, bulk Y-Ba-Cu-O superconductor. Superconductor Science and Technology, 28, 095008.
Peer reviewed (verified by ORBi)
Bulk, high temperature superconductors have significant potential for use as powerful permanent magnets in a variety of practical applications due to their ability to trap record magnetic fields. In this paper ...
Egan, R., Philippe, M., Wera, L., Fagnard, J.-F., Vanderheyden, B., Dennis, A., Shi, Y., Cardwell, D. A., & Vanderbemden, P. (2015). A flux extraction device to measure the magnetic moment of large samples; application to bulk superconductors. Review of Scientific Instruments, 86(2), 025107.
Peer reviewed (verified by ORBi)
We report the design and construction of a flux extraction device to measure the DC magnetic moment of large samples (i.e., several cm3) at cryogenic temperature. The signal is constructed by integrating the ...
Hogan, K., Fagnard, J.-F., Wera, L., Vanderheyden, B., & Vanderbemden, P. (2015). Magnetic shielding of an inhomogenous magnetic field source by a bulk superconducting tube. Superconductor Science and Technology, 28(3), 035011.
Peer reviewed (verified by ORBi)
Bulk type-II irreversible superconductors can act as excellent passive magnetic shields, with a strong attenuation of low frequency magnetic fields. Up to now, the performances of superconducting magnetic ...
Devendra Kumar, N., Closset, R., Wera, L., Cloots, R., Vanderbemden, P., & Vertruyen, B. (2015). Magnetic shielding performances of YBa2Cu3O7−δ -coated silver tubes obtained by electrophoretic deposition. Superconductor Science and Technology, 28, 015007.
Peer reviewed (verified by ORBi)
We report a complete procedure to achieve multilayer YBCO thick films by electrophoretic deposition on silver tubes using a suspension of YBCO powder in butanol. With the aim to optimize the magnetic ...
Wera, L., Fagnard, J.-F., Hogan, K., Vanderheyden, B., & Vanderbemden, P. (2014, August 12). Experimental study of the magnetic shielding performances of a Bi2223 tube closed by a Bi2223 cap. Poster session presented at Applied Superconductivity Conference ASC 2014, Charlotte, NC, USA.
A superconducting tube can be used as an efficient magnetic shield. However, the shielding factor (defined as the ratio between the applied magnetic induction and the magnetic induction measured inside the ...
Closset, R., Kumar, D., Wera, L., Dellicour, A., Henrist, C., Boschini, F., Cloots, R., Vanderbemden, P., & Vertruyen, B. (2014). YBa2Cu3O7-δ thick films for magnetic shielding: Electrophoretic deposition from butanol-based suspension. Materials Letters, 119, 154-156.
Peer reviewed
Multilayered YBa2Cu3O7-δ (YBCO) thick films were coated on silver substrates by electrophoretic deposition (EPD) followed by heat treatment. A butanol-based YBCO suspension is used instead of the common ...
Wera, L., Fagnard, J.-F., Levin, G. A., Vanderheyden, B., & Vanderbemden, P. (2012). Magnetic shielding with YBCO coated conductors: influence of the geometry on its performances. IEEE Transactions on Applied Superconductivity, 23(3), 8200504.
Peer reviewed (verified by ORBi)
A superconducting magnetic shield can be built as a stack of several sections of milled 2G coated conductors. Each section consists of a closed loop where persistent currents can flow and provide a strong ...
Wera, L., Fagnard, J.-F., Levin, G., Vanderheyden, B., & Vanderbemden, P. (2012, October 10). Magnetic shielding with YBCO coated conductors: influence of the geometry on its performances. Poster session presented at Applied Superconductivity Conference ASC2012, Portland, OR, USA.
A superconducting magnetic screen can be built as a stack of several sections of milled 2G coated conductors. Each section consists of a closed loop where persistent currents can flow and provide a strong ...
Wera, L. (2011). Etude préliminaire d’un UAV - Partie structure. Unpublished master thesis, Université de Liège, ​Liège, ​​Belgique.
Le but du projet est de concevoir un drone capable de filmer des objectifs au sol grâce à une camera 3D. Le projet débuté en septembre 2009 a aboutit à un design conceptuel du drone et à une première ...