Title :
Hall sensor magnetometer measurements of Bi-HTS tapes for low AC loss applications
Author :
Masti, M. ; Lehtonen, J. ; Perälä, R. ; Joronen, J. ; Goldacker, W. ; Zabara, O. ; Nast, R. ; Arndt, T.J. ; Bruzek, C.E. ; Lallouet, N.
Author_Institution :
Inst. of Electromagn., Tampere Univ. of Technol., Finland
fDate :
6/1/2004 12:00:00 AM
Abstract :
In order to reduce ac losses in Bi-2223 tapes twisted filaments and different kinds of oxide barriers around filaments have been developed. In this paper, the homogeneity and electromagnetic behavior of these tapes are studied. The magnetic flux density maps over current carrying samples are measured with Hall sensor magnetometer. The homogeneity of tapes is most easily visible when dc transport currents at different amplitudes and remanence currents after switching off the dc transport current are examined. Ac transport currents at 50 Hz are used to determine the current of full penetration. The results of different samples are compared and discussed in relation to the design-parameters of the tapes.
Keywords :
Hall effect devices; bismuth compounds; calcium compounds; high-temperature superconductors; lead compounds; magnetic field measurement; magnetic flux; magnetometers; strontium compounds; superconducting tapes; 50 Hz; Bi-2223 tapes; Bi-HTS tapes; Bi2-xPbxSr2Ca2Cu3O10; Hall sensor; current carrying samples; design parameters; electromagnetic behavior; homogeneity behavior; low AC loss applications; magnetic flux density; magnetometer measurements; oxide barriers; remanence currents; resistive barrier; transport currents; twisted filaments; Current measurement; Density measurement; High temperature superconductors; Loss measurement; Magnetic flux density; Magnetic sensors; Magnetometers; Remanence; Superconducting magnets; Transformers; /Ag tapes; Bi-222; hall sensor magnetometer; resistive barrier; twisted filaments;
Journal_Title :
Applied Superconductivity, IEEE Transactions on
DOI :
10.1109/TASC.2004.830411
