Yoshio Furuto

Multifilamentary stranded compound superconductor

Abstract This paper summarizes our research on newly-developed multifilamentary V 3 Ga and Nb 3 Sn compound superconductors, including their design, processing, and characteristics such as mechanical and superconducting properties, and coil performance.

An Overview of Practical Superconductor Development in Japan

Application of superconductivity phenomenon is being studied in various areas including energy, transportation, information, and medical services. In 1980s, it has been gaining momentum and spreading far and wide (Table 1). The prime moving force of such growth of applied superconductivity is the development of superconducting wires. Very reliable wires have been developed through accumulation of many techniques. At present, multifilamentary Nb-Ti alloy wires are extensively in use for various applications, and Nb3Sn and V3Ga compounds have also been made successfully into multifilamentary wires. Practical application of other compounds having even higher properties is being investigated by the use of new manufacturing techniques.

Superconducting Magnet for Use in MRI System

The MRI market has expanded rapidly in Europe and the US, leading to wide spread adoption of super-conducting magnets. Also in Japan the trends are changing from resistive to superconducting systems these days. In this paper we summarize the features and present status of superconducting magnets for MRI and make introduction of HiHo-rampable, Compact, and Active-shielded magnets. Finally, a few words are paid for the prospect of superconducting magnet for MRI in the near future.

Development of Multifilamentary Compound Superconductors

Various types of multifilamentary compound superconductors have been developed consistently for the past ten years at the Furukawa Electric Company.