Nb₃Sn superconducting wire
Nb₃Sn superconducting wire is the only superconducting material on the market except Nb-Ti that has been commercialized on a large scale. The main application areas are superconducting magnets with magnetic field strength above 10T and below 20T, such as: High Energy Particle Collider nuclear magnetic resonance Spectrometer (600-1000MHz NMR), Medical nuclear magnetic resonance Imager (7T/9T/14T MRI), Scientific instrument (14T/16T PPMS/MPMS Ouantum Design); 14T/18T superconducting transport test equipment Oxford Instruments), magnetic confinement fusion reactor (China Fusion Engineering Reactor (CFETR TF/CS coil), etc.). This product is Cu, Nb, Sn and Ta four metal composite wire, wound into a coil or cable conductor, after heat treatment into a superconductor. The wire is mainly used in high field superconducting magnet coils.
Parameter
Bare wire size
0.818±0.005mm
Wire diameter (after plating)
0.820±0.005mm
Coating material
Cr
Coating thickness
0.002(-0.001, +0)mm
Post-insulation dimension
Φ0.970±0.015mm
Withstand voltage
≥500V
Torque
15±2mm
Torsion direction
dextrorotation
Copper to non-copper ratio
1.0±0.1
RRR(273K/20K)
>100 (after heat treatment)
Critical density current
Jc@4.22K&12.0T=800~1100A/mm2
Transition index
n-value@4.22K&12.0T>20
Hysteresis loss
Qh:<1000mJ/cc @±3T
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