Improved superconducting magnet wire
Abstract
A superconducting tape or wire is composed of alternating layers of copper and a niobium-containing superconductor such as niobium of NbTi, Nb3Sn or Nb3Ge. In general, each layer of the niobium-containing superconductor has a thickness in the range of abut 0.05 to 1.5 times its coherence length (which for Nb3Si is 41 A) with each copper layer having a thickness in the rage of about 170 to 600 A. With the use of very thin layers of the niobium composition having a thickness within the desired range, the critical field (H/sub c/) may be increased by factors of 2 to 4. Also, the thin layers of the superconductor permit the resulting tape or wire to exhibit suitable ductility for winding on a magnet core. These compositions also characterized by relatively high values of critical temperature and therefore will exhibit a combination of useful properties as superconductors.
- Publication:
-
Patent Application Department of Energy
- Pub Date:
- August 1983
- Bibcode:
- 1983doe..reptW....S
- Keywords:
-
- Magnetic Cores;
- Superconducting Magnets;
- Superconductors;
- Wire;
- Copper;
- Ductility;
- Germanium Alloys;
- Niobium Alloys;
- Niobium Stannides;
- Patent Applications;
- Electronics and Electrical Engineering