Abstract
High-Tc superconductor (HTS) has been expected as a current lead between a low Tc superconductor and a power supply for a large-scale superconducting magnet system because of its advantages of a low heat load to a cryogenic system and a high transfer current density. Bi2212 bulk superconductor is a candidate material for this kind of current lead. To design a current lead using HTS, we investigated a thermal contraction, Young's modulus, and compressive strength of a Bi2212 bulk which was prepared by a diffusion process. A method of reinforcement of the bulk using a glass-epoxy was also considered and confirmed its effectiveness.
