Design Study of Bi2212 High Tc Superconductor Prepared by Diffusion Process for Current Lead
Details
Current leads using HTS material have been developed rapidly for large scale superconducting magnet systems. NIFS and Tokai University have been investigating characteristics of Bi2212 tubular bulk which was prepared by a diffusion process. 8 kA of the maximum transfer current was achieved at 4 K with the bulk size of 38 mm/30 mm in outer/inner diameters and 200 mm in length, respectively. HTS bulk should be reinforced so that a mechanical strength was improved. Alumina fiber with epoxy resin seemed to be good for the reinforcement for the Bi2212 HTS. Bi2212 HTS prepared by diffusion process has a potential for flexible design since superconducting layer can be reacted on the surface of any shapes of substrate. In this paper, a design of a current lead using this type of Bi2212 tubular bulk was studied with conventional heat exchanger part and low-Tc superconducting bus line considering a shape of HTS part.
