Development of ${\rm Nb}_{3}{\rm Al}$ Rutherford Cable for High-Field Accelerator Magnet Applications

We have been developing
${\rm Nb}_{3}{\rm Al}$
high-field accelerator magnets with the aim of upgrading the luminosity of the Large Hadron Collider. In this program, four kinds of Ta-matrix
${\rm Nb}_{3}{\rm Al}$
strands with slightly different cross-sectional structures (K1, K2, K3 and K4 strands) were designed and fabricated. The non-copper
${\rm J}_{\rm c}$
values of these strands were 700–800
${\rm A/mm}^{2}$
at 15 T and 4.2 K. The cabling work of these strands was performed at Fermilab, and the superconducting properties of the cables were studied using the extracted strands from the cables. In this paper, we report on the fabrication experience for the strands and cables. The results obtained from this study are also presented.