Neutron Diffraction Measurements of Internal Strain in ${\rm Nb}_{3}{\rm Sn}$ Cable-In-Conduit Conductors

The superconducting properties of Nb
₃
Sn strands are very sensitive to strain. Measuring internal strain of Nb
₃
Sn in Cable-In-Conduit Conductors (CICC) is important for evaluating the superconducting performance of CICC. Internal strain can be determined by neutron diffraction measurement using Takumi of J-PARC. Neutron diffraction measurement becomes a strong tool for evaluating directly the internal strain of Nb
₃
Sn in CICC.