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3D modeling of coupling between superconducting filaments via resistive matrix in AC magnetic field

3D modeling of coupling between superconducting filaments via resistive matrix in AC magnetic field
3D modeling of coupling between superconducting filaments via resistive matrix in AC magnetic field
The ac loss of superconducting composite depends strongly on coupling between superconducting filaments via the resistive matrix. The established technique for loss reduction using twisted filaments relies on the decoupling of the filaments below a critical coupling field Bc, which increases with the reduction of the twist pitch and the matrix conductivity. Although the concept of Bc may be clearly demonstrated using two infinite slabs of finite length, further details on its correlation with the filament/conductor geometry are not yet available. The main obstacle is due to the fact that any accurate analysis of such a problem must be carried out in 3d. In this paper, we describe the initial results from 3d modeling using Cedrat's Flux3D, for which a superconductor module for handling power-law E-J characteristics was developed. Using a simple model of two rectangular superconductors connected through a normal metal, we demonstrate the feasibility for quantitative modeling of their coupling behavior over a wide range of field sweep rates for different conductor geometries. Typical examples were given for cases not addressed by the existing approximate theory, as well as for the evolution of field profile for varying field sweep rate.
1051-8223
3634-3637
Cost, M.
6918ab8a-d806-4960-bdef-872f18342d09
Martinez, E.
67ed8d9b-3213-4797-aeae-1c9e6985e48f
Beduz, C.
2cbc6ece-3e8b-454b-86d6-3960596bd234
Yang, Y.
4cac858a-e0c0-4174-a839-05ca394fc51f
Grilli, F.
19369d09-bb21-4bfd-a034-972c8347afae
Dutoit, B.
ed3fdf41-b88a-4d24-a518-2aed7b7e7785
Vinot, E.
39710595-2a42-4c57-959c-b915af01e251
Tixador, P.
ee7cec8b-2517-4ae4-983f-48d4100ba77c
Cost, M.
6918ab8a-d806-4960-bdef-872f18342d09
Martinez, E.
67ed8d9b-3213-4797-aeae-1c9e6985e48f
Beduz, C.
2cbc6ece-3e8b-454b-86d6-3960596bd234
Yang, Y.
4cac858a-e0c0-4174-a839-05ca394fc51f
Grilli, F.
19369d09-bb21-4bfd-a034-972c8347afae
Dutoit, B.
ed3fdf41-b88a-4d24-a518-2aed7b7e7785
Vinot, E.
39710595-2a42-4c57-959c-b915af01e251
Tixador, P.
ee7cec8b-2517-4ae4-983f-48d4100ba77c

Cost, M., Martinez, E., Beduz, C., Yang, Y., Grilli, F., Dutoit, B., Vinot, E. and Tixador, P. (2003) 3D modeling of coupling between superconducting filaments via resistive matrix in AC magnetic field. IEEE Transactions on Applied Superconductivity, 13 (2, Part 3), 3634-3637. (doi:10.1109/TASC.2003.812416).

Record type: Article

Abstract

The ac loss of superconducting composite depends strongly on coupling between superconducting filaments via the resistive matrix. The established technique for loss reduction using twisted filaments relies on the decoupling of the filaments below a critical coupling field Bc, which increases with the reduction of the twist pitch and the matrix conductivity. Although the concept of Bc may be clearly demonstrated using two infinite slabs of finite length, further details on its correlation with the filament/conductor geometry are not yet available. The main obstacle is due to the fact that any accurate analysis of such a problem must be carried out in 3d. In this paper, we describe the initial results from 3d modeling using Cedrat's Flux3D, for which a superconductor module for handling power-law E-J characteristics was developed. Using a simple model of two rectangular superconductors connected through a normal metal, we demonstrate the feasibility for quantitative modeling of their coupling behavior over a wide range of field sweep rates for different conductor geometries. Typical examples were given for cases not addressed by the existing approximate theory, as well as for the evolution of field profile for varying field sweep rate.

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Published date: June 2003

Identifiers

Local EPrints ID: 22631
URI: http://eprints.soton.ac.uk/id/eprint/22631
ISSN: 1051-8223
PURE UUID: 1f85d4fe-368f-4094-93b2-e8223901a8d9
ORCID for Y. Yang: ORCID iD orcid.org/0000-0002-3874-6735

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Date deposited: 24 Mar 2006
Last modified: 09 Jan 2022 02:44

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Contributors

Author: M. Cost
Author: E. Martinez
Author: C. Beduz
Author: Y. Yang ORCID iD
Author: F. Grilli
Author: B. Dutoit
Author: E. Vinot
Author: P. Tixador

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