Latest Improvements of Current Carrying Capability of Niobium Tin and Its Magnet Applications

Practical high field superconducting magnets are exclusively built with Nb 3 Sn multi-filamentary composites. Over the last few years there have been significant improvements in the current carrying capability of Nb 3 Sn strand, and these improvements offer the possibility to build more efficient and higher field strength magnets. The Nb 3 Sn composite requirements are somewhat different depending on the application, such as magnetically confined fusion, high energy physics accelerators, and solenoids for NMR or laboratory magnets, and thus require different designs. We will present the current status of Nb 3 Sn strand development at Oxford Instruments, Superconducting Technology (OST) for these applications, along with magnet results