DocumentCode :
970275
Title :
Low AC loss Nb3Sn tape for transmission line applications
Author :
Brisbin, P.H. ; Swartz, P.S. ; Pickard, K.W.
Author_Institution :
Intermagnetics General Corporation, Charles Industrial Park, Guilderland, New York
Volume :
15
Issue :
1
fYear :
1979
fDate :
1/1/1979 12:00:00 AM
Firstpage :
146
Lastpage :
149
Abstract :
A process for modifying the surface topography of Nb3Sn tapes so as to achieve low ac losses has been further developed by experimental operation at pilot plant scale. Diffusion process Nb3Sn tapes are treated by etching followed by hot dip coating with tin. Problems involved in control of the etch process and the Nb3Sn input have been studied for the purpose of optimizing the product superconductor with respect to minimum losses in combination with high values of critical current. Performance capability has been demonstrated by processing a group of four tapes totaling about 3,000 feet. The average ac loss for the group, as determined from measurements at each end of each tape, is at the target specification: 10 μW/cm2(500 rms A/cm, 60 Hz, 4.2 K, unclad). The target specification for critical current was also met.
Keywords :
Superconducting cables; Critical current; Diffusion processes; Dip coating; Etching; Loss measurement; Niobium; Superconducting films; Surface topography; Surface treatment; Tin;
fLanguage :
English
Journal_Title :
Magnetics, IEEE Transactions on
Publisher :
ieee
ISSN :
0018-9464
Type :
jour
DOI :
10.1109/TMAG.1979.1060202
Filename :
1060202
Link To Document :
بازگشت