A trapped field of 17.7 T in a stack of high temperature superconducting tape
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Authors
Williams, Thomas
McCaul, A
Coniglio, W
Hanisch, J
Lao, M
Glowacki, Bartek
Publication Date
2018-07-27Journal Title
Superconductor Science and Technology
ISSN
0953-2048
Publisher
IoP
Volume
31
Issue
9
Type
Article
Metadata
Show full item recordCitation
Patel, A., Baskys, A., Williams, T., McCaul, A., Coniglio, W., Hanisch, J., Lao, M., & et al. (2018). A trapped field of 17.7 T in a stack of high temperature superconducting tape. Superconductor Science and Technology, 31 (9)https://doi.org/10.1088/1361-6668/aad34c
Abstract
High temperature superconducting (HTS) tape can be cut and stacked to generate large magnetic fields at cryogenic temperatures after inducing persistent currents in the superconducting layers. A field of 17.7 T was trapped between two stacks of HTS tape at 8 K with no external mechanical reinforcement. 17.6 T could be sustained when warming the stack up to 14 K. A new type of hybrid stack was used consisting of a 12 mm square insert stack embedded inside a larger 34.4 mm diameter stack made from different tape. The magnetic field generated is marginally higher than the previous trapped field record achieved by a bulk HTS magnet and 30% greater than previously achieved in a stack of HTS tapes. Such stacks are being considered for superconducting motors as rotor field poles where the cryogenic penalty is justified by the increased power to weight ratio. The sample reported can be considered the strongest permanent magnet ever created.
Sponsorship
EPSRC
Funder references
EPSRC (EP/P000738/1)
Identifiers
External DOI: https://doi.org/10.1088/1361-6668/aad34c
This record's URL: https://www.repository.cam.ac.uk/handle/1810/279848
Rights
Attribution 4.0 International (CC BY 4.0)
Licence URL: https://creativecommons.org/licenses/by/4.0/