Shielding of AC Magnetic Fields by Coils and Sheets of Superconducting Tapes

Author

Kvitkovic, Jozef ; Voccio, John ; Pamidi, Sastry V.

Author_Institution

Center for Adv. Power Syst., Florida State Univ., Tallahassee, FL, USA

Volume

19

Issue

3

fYear

2009

fDate

6/1/2009 12:00:00 AM

Firstpage

3577

Lastpage

3580

Abstract

Magnetic field shielding properties of coils and sheets of silver sheathed (Bi,Pb)₂Sr₂Ca₂Cu₃O_10+x tapes (1G superconductor tapes) and YBa₂Cu₃O₇ coated conductors (2G superconductor tapes) are reported. Shielding properties were measured at 77 K, with varying field amplitude and frequency of external magnetic field, using Hall probes and a phase sensitive technique. Shielding factor data on several coils and sheets are presented as a function of external field amplitude and frequency. Magnetic field shielding of up to 50% was observed at field amplitudes of < 10 mT. Differences in frequency dependence of shielding properties of test shields fabricated from 1G and 2G conductors are discussed.

Keywords

Hall effect; barium compounds; bismuth compounds; lead compounds; magnetic fields; magnetic shielding; strontium compounds; superconducting tapes; yttrium compounds; AC magnetic fields; BSCCO coils; BiPb₂Sr₂Ca₂Cu₃O; Hall probes; YBa₂Cu₃O₇; coated conductors; external magnetic field; magnetic field shielding properties; magnetic flux density 1 G; magnetic flux density 2 G; phase sensitive technique; shielding factor data; silver sheathed tapes; superconducting tapes; superconductor tapes; temperature 77 K; AC magnetic field; BSCCO coils; Hall probe; YBCO coils; magnetic shielding;

fLanguage

English

Journal_Title

Applied Superconductivity, IEEE Transactions on

Publisher

ieee

ISSN

1051-8223

Type

jour

DOI

10.1109/TASC.2009.2018856

Filename

5153197