Magnets for the next generation accelerators require a higher performance level in the superconductor to enable magnetic fields of 15 Tesla or more. The superconductor must also be cost effective in order for the magnets of these fields to be economically viable. This project will develop a superconductor of Nb₃Sn, using an internal tin process approach. The approach will utilize micron-size filaments doped with titanium to achieve high current in a process that allows large-scale production techniques, such as utilized in NbTi. The whole package would include a cable of low-cost copper, a strengthening element if required, and the superconductor itself, resulting in a flexible overall conductor. Phase I will demonstrate the feasibility of the concept by processing several sub-scale billets to wire, followed by heat treatment and critical current testing. Various candidate materials will be evaluated to control the bonding of the superconductor stabilizer. Finally, cost models will be developed and cost reduction opportunities will be identified.

Commercial Applications and Other Benefits as described by the awardee: Lower cost superconductors should reduce the cost of MRI machines and expand the range of applications for MRI, a billion dollar industry. In addition, the next generation accelerators will require a significantly higher performance superconductor at an economical price. The conductor currently under development should meet these goals, and be readily and quickly scaleable to production.