Title :
Characterization of multifilamentary Nb/sub 3/Sn superconducting wires for use in the 45-T hybrid magnet
Author :
Summers, L.T. ; McKinnell, J.C. ; Bray, S.L. ; Ekin, J.W.
Author_Institution :
Nat. High Magnetic Lab., Tallahassee, FL, USA
fDate :
6/1/1995 12:00:00 AM
Abstract :
The National High Magnetic Field Laboratory (NHMFL), in collaboration with the Francis Bitter National Magnet Laboratory, is constructing a 45-T hybrid magnet system. Here we report the results of studies to characterize candidate Nb/sub 3/Sn superconductor for use in the superconducting outsert coils. We have determined the effects of strain and magnetic field on the critical current, measured ac losses, and measured residual resistivity ratios (RRR). Critical currents in excess of 1000 A mm/sup -2/ non-Cu have been measured in sample wires at 12 T and 4.2 K combined with a hysteresis loss of less than 500 mJ cm/sup -3/ We also present predicted 1.8 K performance, based on empirical models, and present a methodology for calculating sample holder prestrain.<>
Keywords :
critical current density (superconductivity); critical currents; magnetic leakage; multifilamentary superconductors; niobium alloys; superconducting magnets; tin alloys; 1.8 K; 12 T; 4.2 K; 45 T; 45-T hybrid magnet; AC losses; Nb/sub 3/Sn; critical current; critical current density; empirical models; hysteresis loss; magnetic field effect; multifilamentary Nb/sub 3/Sn superconducting wires; residual resistivity ratios; sample holder prestrain; strain effect; superconducting outsert coils; Current measurement; Laboratories; Loss measurement; Magnetic field measurement; Multifilamentary superconductors; Niobium; Strain measurement; Superconducting coils; Superconducting filaments and wires; Superconducting magnets;
Journal_Title :
Applied Superconductivity, IEEE Transactions on
