High Performance, Ti Doped Nb3Sn Fabricated by the Internal Tin Tube Method

The High Energy Physics (HEP) community requires the development of superconducting wires for use in magnets generating magnetic fields greater than 12 Tesla. Currently, Nb3Sn is the only commercially available superconductor capable of operating at such high fields. However, the technical and cost performance to date does not meet the stated requirements of the HEP Conductor Advisory Group. This project will develop an economical process for the fabrication of Nb3Sn conductors that will meet the demands for next generation magnet development. The Phase II project will utilize the tubular niobium method developed in the previous Phase I. The Phase II work will consist of heat treatment optimization studies and experiments aimed at further increasing the critical current density. Titanium doped niobium tubes will be fabricated by fixed mandrel tube extrusion and conductor will be scaled up to commercial quantities. Commercial Applications and other Benefits as described by the awardee: High performance multifilament Nb3Sn will find applications in HEP particle accelerators, magnetic confinement fusion machines, and commercial nuclear magnetic resonance magnets.