Quality Assurance Tests of ${\rm Nb}_{3}{\rm Sn}$ Wires for the Series-Connected Hybrid Magnets

About 450 km of high J
_C
Nb
₃
Sn wires have been procured for the construction of two series-connected hybrid magnets by the National High Magnetic Field Laboratory (NHMFL). In addition to the quality assurance tests by the wire manufacturer, a receiving quality assurance inspection with a predetermined sampling frequency is carried out at the NHMFL. These tests include wire diameter, twist pitch, Cu/non-Cu ratio, I
_C
, residual resistance ratio, hysteresis loss, and I
_C
strain dependence. In this paper, the test procedures are described and the test results are presented. Based on these test results, all the wires have been accepted.