Strong high-temperature superconductor trapped field magnets

摘要

A trapped field magnet formed of a high temperature type II superconductor material is disclosed. The trapped field magnet is formed of a plurality of relatively small, single-grain superconductive elements. Optimal shaped of these elements is in a regular truncated cone wherein the half cone angle is 55 DEG , and the optimal orientation of each single-grain superconducting elements is an angle of phi m with respect to the axis perpendicular to the upper and lower surface of the element, wherein the phi m=3 sin theta cos theta /(3 cos2 theta 0-1) and theta determines the location of the element (FIG. 3a).