Design of high temperature superconducting magnet

It is well known that I/sub c/ (critical current) in high temperature superconducting (HTS) materials is more sensitive to magnetic fields perpendicular to the wide face of the HTS tape (B/spl perp/) than to fields parallel to that (B//). Thus, in shape design of the HTS magnet, a method to reduce the value of B/spl perp/ should be considered. This work presents a racetrack HTS magnet with iron plates to achieve the maximum current-carrying capacity and the simple shape that can easily be wound and jointed. The shape, position, and kinds of iron plates are chosen by way of 3 Dimensional Finite Element Analysis (3-D FEA) considering magnetic saturation of iron plates. The racetrack HTS magnet with iron plates, a magnet having optimized current distribution and an initial magnet are compared with each other through 3-D FEA, manufacturing and testing of these magnets. The current capabilities of HTS magnet with iron plates improved by 50% on the basis of the initial magnet.