Advanced Designs for Enhanced Thermo-Magnetic Stability in High Jc Nb3Sn Wires

Abstract

The DT design provides high J_c through uniform tin distribution, while the DB design enhances mechanical strength and thermal stability. The hybrid design, known as the Distributed Barrier Strand (DBS), balances these properties, significantly improving thermo-magnetic stability while maintaining high J_c. The wires were fabricated using the internal tin process and underwent a multi-stage heat treatment to form the Nb₃Sn phase. Evaluations of various designs in terms of critical current density (J_c), thermo-magnetic stability, strain tolerance, and mechanical properties revealed that the DBS hybrid design exhibited higher stability and performance compared to the individual DT and DB designs. This research offers key insights into the design and fabrication of Nb₃Sn superconducting wires and has important implications for high-performance applications.