๐”– Bobbio Scriptorium
โœฆ   LIBER   โœฆ

Factors affecting the upper critical field of NbTi wires

โœ Scribed by K. Tachikawa; S. Koyama; S. Takahashi

Publisher
Elsevier Science
Year
1994
Tongue
English
Weight
246 KB
Volume
34
Category
Article
ISSN
0011-2275

No coin nor oath required. For personal study only.

โœฆ Synopsis

The intercomparison on the upper critical field measurement in the Nb-Ti wire (NIST SRM 1457) has been performed through the VAMAS activity. The homogeneity in the He2 of the wire was good enough, and the coefficient of scatter in the He2 intercomparison was about 0.60 %. Effects of several factors on the He2 of the Nb-Ti wire are reported in the present paper. The coiled specimen shows slightly lower He: than the straight sample. The He= of the wire decreases by annealing, and recovers by wire drawing, The Hca of the wire shows an appreciable anisotropy with respect to the direction of applied field. The anisotropy in Hca is eliminated by annealing, and reintroduced by the subsequent wire drawing.

๐Ÿ“œ SIMILAR VOLUMES

Homogeneity and accuracy of the second c
Homogeneity and accuracy of the second critical field Bc2 of the NIST SRM-1457 standard NbTi/Cu wire
โœ Bennie ten Haken; Eric Krooshoop; Herman H.J. ten Kate ๐Ÿ“‚ Article ๐Ÿ“… 1994 ๐Ÿ› Elsevier Science ๐ŸŒ English โš– 306 KB

In the frame work of the VAMAS intercomparison activities the second critical field Bc2 of the standard NIST NbTi/Cu superconductor was investigated in several laboratories in the world. In this paper the specific results obtained in the UT laboratory are reported. On a single piece of wire of 1.5 m

Experimental hysteretic loss for a serie
Experimental hysteretic loss for a series of superconducting filamentary NbTi wires and a field dependent critical state model
โœ J.J. Wollan; M.C. Ohmer ๐Ÿ“‚ Article ๐Ÿ“… 1976 ๐Ÿ› Elsevier Science ๐ŸŒ English โš– 772 KB

Analytic expressions for hysteretic loss have been developed for half-cycle and full-cycle field sweeps for rod geometries for a critical state model with critical current inversely proportional to field. Bulk effects with surface-like character are discussed along with surface shielding fields and