Title :
Shielding and losses in multifilamentary tapes exposed to perpendicular AC magnetic fields
Author :
Farinon, Stefania ; Fabbricatore, Pasquale ; Gömöry, Fedor ; Seiler, Eugen
Author_Institution :
Ist. Nazionale di Fisica Nucl., Genova, Italy
fDate :
3/1/2001 12:00:00 AM
Abstract :
In multifilamentary high-Tc tapes for energy transportation, a component of magnetic field is applied normally to the filament surfaces. Since the thickness of any filament of the tape is much smaller than the width (the factor is usually between 10 and 20), it results in large field amplification on the tape surface and consequently a large loss. This problem is studied in detail here, analysing the behavior of Bi 2223/Ag tapes with different structures of the filamentary zone. Experimental data are compared with calculations based on finite element codes. The importance of filament arrangement for AC losses is illustrated
Keywords :
bismuth compounds; calcium compounds; finite element analysis; high-temperature superconductors; magnetic leakage; magnetic shielding; multifilamentary superconductors; silver; strontium compounds; superconducting tapes; AC losses; Bi2Sr2Ca2Cu3O-Ag; filament thickness; finite element codes; high-Tc tapes; multifilamentary tapes; perpendicular AC magnetic fields; shielding; Finite element methods; High temperature superconductors; Magnetic analysis; Magnetic fields; Magnetic shielding; Magnetic susceptibility; Multifilamentary superconductors; Strips; Superconducting films; Transportation;
Journal_Title :
Applied Superconductivity, IEEE Transactions on
