Title :
Bronze route conductors for 1 GHz NMR superconducting magnet
Author :
Hase, Tomohiro ; Murakami, Yasutaka ; Hayashi, S. ; Kawata, Yoshimasa ; Kawate, Y. ; Kiyoshi, T. ; Wada, Hiroyuki ; Miyazaki, Toshimasa
Author_Institution :
Kobe Steel Ltd., Hyogo, Japan
fDate :
3/1/2000 12:00:00 AM
Abstract :
Bronze route Nb/sub 3/Sn conductors applied to 1 GHz nuclear magnetic resonance spectrometer have been manufactured. Cu-1Swt%Sn-0.3wt%Ti (15% Sn-bronze) Nb/sub 3/Sn conductors employed in inner coils have shown overall J/sub c/ over 100 A/mm/sup 2/ in 21 T at 1.8 K. Other conductors with a Ta-core as a reinforcement employed in outer coils have presented a 0.2% proof strength of 300 MPa at 4.2 K. It is also reported that J/sub c/ of 15%-bronze conductors is enhanced to match that of the tube-processed Nb/sub 3/Sn conductors in the middle magnetic field region of 12-16 T.
Keywords :
NMR spectrometers; critical current density (superconductivity); niobium alloys; superconducting coils; superconducting magnets; tin alloys; type II superconductors; 1 GHz; 12 to 16 T; 21 T; NMR superconducting magnet; Nb/sub 3/Sn; Nb/sub 3/Sn conductors; Ta-core; bronze route conductors; critical current density; inner coils; middle magnetic field region; outer coils; Art; Coils; Conductors; Contamination; Magnetic fields; Niobium; Nuclear magnetic resonance; Solids; Superconducting magnets; Tin;
Journal_Title :
Applied Superconductivity, IEEE Transactions on
