| Abstrakt: |
We have developed Nb-rod method Cu-Nb reinforced Nb3Sn wires (Cu-Nb/Nb3Sn wires), which have significantly improved superconducting characteristics under mechanical stress compared to conventional Nb3Sn wires. Cu-Nb/Nb3Sn wires can be manufactured into coils not only with the conventional wind-and-react (W&R) method but also with the react-and-wind (R&W) method, and the superconducting performance and the mechanical characteristics are both improved by a strain control through pre-bending treatment. Furthermore, elemental technology developments for a higher strength, a higher critical current density, a rectangularization, an enamel coating, a thinner wire for small radius bending, and a stranded wire have made them practical wires with an excellent manufacturability. In the future, Cu-Nb/Nb3Sn wires will be expected to be applied in advanced superconducting equipment such as a high magnetic field NMR/MRI, a particle accelerator, and a large fusion reactor. [ABSTRACT FROM AUTHOR] |
