Investigation of ${\rm Nb}_{3}{\rm Sn}$ Strand for ITER by Bronze Route

As one of low temperature superconducting materials, multifilamentary Nb
₃
Sn strand is an ideal choice for high-field superconducting magnets (>10 T). The International Thermonuclear Experimental Reactor (ITER) has special requirements for the Nb
₃
Sn strands: high critical current density and low hysteresis loss. Multifilamentary Nb
₃
Sn strand with high performance has been developed by bronze process. The highest non-Cu J
_cn
(12 T, 4.22 K, 0.1 ¿V/cm) value of 812 A/mm
²
has been obtained. The hysteresis loss of the strand is 380 mJ/cm
³
with 650°C ×100 h. The properties of the Nb
₃
Sn strand can meet the specifications proposed by the ITER project.