✦ LIBER ✦

Critical current densities of multifilamentary Nb3Sn composite conductors with fine filaments

✍ Scribed by Y. Kubota; K. Yasohama; T. Ogasawara

Publisher: Elsevier Science
Year: 1989
Tongue: English
Weight: 401 KB
Volume: 29
Category: Article
ISSN: 0011-2275
DOI: 10.1016/0011-2275(89)90178-1

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✦ Synopsis

Multifilamentary Nb3Sn composite conductors with 65 880 and 421 160 filaments have been fabricated in long lengths by the internal tin-diffusion method. Filament diameters are in the range from 31.1 nm to 274 nm. Conductors were heat treated for 1 to 53 days at various temperatures from 400°C to 700°C. The critical current density was measured at 4.2 K in an external magnetic field perpendicular to the direction of the current. It increases with decreasing filament diameter and has a peak at filament diameters of 50.1 nm for 0.5T, becomes maximum at 50.1 nm for fields ranging from 0.75 T to 2 T for low field regions and at about 200 nm above 6 T.

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