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Study of {\rm Nb}_{3}{\rm Al} Wires for High-Field Accelerator Magnet Applications

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14 Author(s)
Tsuchiya, K. ; High Energy Accel. Res. Organ. (KEK), Tsukuba, Japan ; Takeuchi, T. ; Banno, N. ; Kikuchi, A.
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Rapid heating, quenching and transformation (RHQT)-processed Nb3Al wires possess better strain tolerance than Nb3Sn wires. However, RHQT-processed Nb3Al wires so far developed show lower non-copper critical current density (Jc) than recently developed high-Jc Nb3Sn wires in the field range of 12-15 T. Therefore, the development of Nb3Al wires having enhancing Jc in this field range is a major concern for accelerator magnet designers. Among a number of fabrication parameters that might affect Jc properties, we analysed the effect of thickness of Al and Nb foils in the jelly-roll-shaped filaments embedded in the precursor wires. Mechanical and superconducting properties of these wires with various Al-foil thicknesses in the filaments were investigated.

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Applied Superconductivity, IEEE Transactions on  (Volume:20 ,  Issue: 3 )