Electromechanical and Thermal Characterization of Stacked Bi-2223 Tapes at Cryogenic Temperature

Within cryogenic applications and the use of superconductors, efficient current leads are needed. Especially the circumstance to feed electrical current from a source at room temperature into the cryogenic system, while minimizing the heat load, is problematic. These special conductors have to be tailored in electrical and thermal properties by their material composition. In this work properties of stacked Bi-2223 superconducting tapes for current lead application are characterized, like critical current under applied tensile load, thermal properties as thermal conductivity and thermal expansion. The results are used to investigate the influence of the different material components on the performance of the conductor.