Abstract
We have been developing Nb3Al wires processed by rapid heating and quenching for a number of years as promising candidates for use in future high-field accelerator magnets. These wires have better strain and stress tolerances than Nb3Sn wires do, but to meet the demands of future accelerator magnet designs, it is necessary to further improve their performance. In particular,it is necessary to increase their non-copper critical current density in 12-20T fields. To pursue this goal, we introduced double rapid heating and quenching (DRHQ) treatment into the fabrication process for Nb3Al wires, and studied the mechanical and superconducting properties of the resulting DRHQ-processed wires.
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