High field superconductors of NbTi with current capacities in excess of 3000A for application in magnet systems with alternating field components

Monolithic and fully transposed NbTi base conductors in the form of flat cables, with current capacities of up to 10,000 A at 5 T and 4.2 K were developed for use in magnet systems. Methods for measuring the critical values of optimized conductors are described. For conductor manufacturing, extrusion as well as bundling and sealing methods were developed and tested. A number of conductors with different substrate amounts and combinations with high resistivity Cu Ni substrate were produced and electrically optimized. Fully transposed conductors were developed as flat cables. A process for continuous soldering and a soldering cable were developed and set up in order to meet higher mechanical requirements.