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

• Published in: IEEE transactions on applied superconductivity Vol. 19; no. 3; pp. 3577 - 3580
• Main Authors: Kvitkovic, J., Voccio, J., Pamidi, S.V.
• Format: Journal Article Conference Proceeding
• Language: English
• Published: New York, NY IEEE 01.06.2009; Institute of Electrical and Electronics Engineers; The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
• Subjects: AC magnetic field; Amplitudes; Applied sciences; BSCCO coils; Coils; Conductors; COPPER OXIDE; ELECTRIC COILS; Electric connection. Cables. Wiring; Electrical engineering. Electrical power engineering; Electromagnets; Electronics; Exact sciences and technology; Frequency measurement; Hall probe; MAGNETIC FIELD; Magnetic field measurement; Magnetic fields; Magnetic properties; Magnetic shielding; Materials; Phase measurement; Semiconductor electronics. Microelectronics. Optoelectronics. Solid state devices; Shielding; Silver; Strontium; Superconducting coils; Superconducting devices; Superconducting films; Superconducting tapes; SUPERCONDUCTORS; TAPE; Various equipment and components; YBCO coils; YBCO superconductors; YTTRIUM OXIDE; External field; Magnetic screen; Frequency dependence; Alternating field; AC magnetic field; Electromagnetic shielding; Coated material; BSCCO coils; Magnetic shielding; Difference frequency; YBCO coils; Superconducting tapes; Hall probe; Electrical conductor; Magnetic field; High temperature superconductor; Magnetic properties
• ISSN: 1051-8223; 1558-2515
• DOI: 10.1109/TASC.2009.2018856

Magnetic field shielding properties of coils and sheets of silver sheathed (Bi,Pb) 2 Sr 2 Ca 2 Cu 3 O 10+x tapes (1G superconductor tapes) and YBa 2 Cu 3 O 7 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.