CUED Publications database

Simulation studies on the magnetization of (RE)BCO bulk superconductors using various split-coil arrangements

Xu, Z and Lewin, R and Campbell, AM and Cardwell, DA and Jones, H (2012) Simulation studies on the magnetization of (RE)BCO bulk superconductors using various split-coil arrangements. Superconductor Science and Technology, 25. ISSN 0953-2048

Full text not available from this repository.

Abstract

Simulation studies were conducted on the magnetization of (RE)BCO (RE-Ba-Cu-O, where RE represents a rare earth element) bulk superconductors using various split-coil arrangements by solving the critical state equation using the commercial software FlexPDE. A pair of coaxial coils of identical size is identified as an optimum arrangement for practical magnetization at 77K by the zero-field cooling technique. In general, the magnetization process is likely to be most effective when the outer radius of the coils lies between 100% and 50% of the sample radius. A relatively large coil pair is necessary for samples with either a smaller aspect ratio or larger values of J c0. Two different regimes of flux penetration are found to be involved in the magnetization process. For a sufficiently small sample, the penetration field is determined by flux propagation from beneath the coil to the centre of the sample; for a sufficiently large sample, the definitive propagation route is from beneath the coil to the periphery of the sample. Effective split-coil magnetization occurs only in the former regime, and both penetration regimes are completely different from that involved in the solenoidal-coil magnetization process. © 2012 IOP Publishing Ltd.

Item Type: Article
Subjects: UNSPECIFIED
Divisions: Div C > Materials Engineering
Depositing User: Cron Job
Date Deposited: 07 Mar 2014 12:01
Last Modified: 08 Dec 2014 02:26
DOI: 10.1088/0953-2048/25/2/025016