Current and field distribution within multifilamentary Bi2223/Ag tapes

Author

Johnston, M.D. ; Everett, J. ; Dhalle, M. ; Caplin, A.D. ; Friend, C.M. ; LeLay, L. ; Beales, T.P. ; Grasso, G. ; Flukiger, R.

Author_Institution

Centre for High Temp. Superconductivity, Imperial Coll., London, UK

Volume

7

Issue

2

fYear

1997

fDate

6/1/1997 12:00:00 AM

Firstpage

1339

Lastpage

1342

Abstract

The magnetic self-flux distribution around high current mono- and multi-core BSCCO 2223 tapes with various filament configurations has been measured with a scanning micro-Hall probe. Using a simple model, the measured field component perpendicular to the tapes was deconvoluted to give an estimate of the way the transport current distributes itself across the width of the tape. From the changes in flux profile as the applied transport current is varied, the current distribution across the width of the tape can be inferred. In the untwisted tapes, the outer filaments tend to screen the inner ones and carry the bulk of the current; in a twisted sample, the current is shared more equally between filaments.

Keywords

bismuth compounds; calcium compounds; critical current density (superconductivity); flux-line lattice; high-temperature superconductors; multifilamentary superconductors; silver; strontium compounds; Bi/sub 2/Sr/sub 2/Ca/sub 2/Cu/sub 3/O/sub 10/-Ag; field distribution; flux profile; high temperature superconductor; magnetic self-flux distribution; multifilamentary Bi2223/Ag tapes; outer filaments; scanning micro-Hall probe; transport current; untwisted tapes; Bismuth compounds; Cables; Current distribution; Current measurement; Frequency; Hall effect devices; Magnetic field measurement; Magnetic flux; Probes; Superconductivity;

fLanguage

English

Journal_Title

Applied Superconductivity, IEEE Transactions on

Publisher

ieee

ISSN

1051-8223

Type

jour

DOI

10.1109/77.620786

Filename

620786