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Fabrication and evaluation of small coils using PbMo6S8 wires

โœ Scribed by Y. Kubo; F. Uchikawa; S. Utsunomiya; K. Noto; K. Katagiri; N. Kobayashi

Publisher
Elsevier Science
Year
1993
Tongue
English
Weight
648 KB
Volume
33
Category
Article
ISSN
0011-2275

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โœฆ Synopsis

Small three-layer coils with two kinds of mandrels (AI203 and MgO) were fabricated using Chevrel-phase PbMo6S e (PMS) superconducting wires prepared by a powder process. Jc evaluations were carried out on these coils. An excellentJ c of 3.0 x 104 A cm -2 at B = 12 T was obtained for the coil with a MgO mandrel, which corresponded to 84% of the best Jo for the same short wire. In the case of the AI20 3 mandrel, the Jc was degraded to 60% of this value. The thermal expansion coefficient and/c-Strain property of the PMS wires were also determined. The Jc degradation of the coils due to the tensile strain induced in the wire by the mandrels during the cooling process was estimated. As a consequence, the origin of Jc degradation for the small coils was found to be the strain applied from mandrels during the cooling process.

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