Improvement of superconducting properties of Bi-2212 round wire and primary test results of large capacity Rutherford cable

Citation
T. Hasegawa et al., Improvement of superconducting properties of Bi-2212 round wire and primary test results of large capacity Rutherford cable, IEEE APPL S, 11(1), 2001, pp. 3034-3037
Citations number
4
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science
Journal title
IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY
ISSN journal
1051-8223 → ACNP
Volume
11
Issue
1
Year of publication
2001
Part
3
Pages
3034 - 3037
Database
ISI
SICI code
1051-8223(200103)11:1<3034:IOSPOB>2.0.ZU;2-Q
Abstract
We have developed HTS cables using Bi-2212 round wires, which have high mec hanical strength and an average J(c) of 200kA/cm(2) at 4.2K in self-field. Four designs of cables were fabricated in this work and those cables could carry I-c values from 1kA to 10kA at 4.2K and self-field depending on the n umber of strands. A 70m-long 20-strand Rutherford cable was successfully ma nufactured. Optimization of heat treatment conditions was effective to redu ce I-c degradation observed in the case of heat treatment with a long lengt h. I-c vales of a Rutherford table were measured under loading at 4.2K in 4 T, The critical values of the stress on face loading and edge loading were 60MPa and 100MPa, respectively. We successfully obtained high J(c) value of 500kA/cm(2), which was almost double that of the conventional wires capita lize "Rutherford".