Design applications of magnetic mirrors

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Abstract
Recent developments in permanent-magnet materials have made possible several novel high-field sources, with great potential application in mm/microwave/optical technology. However, even the crude approximations to such structures, which are needed to make their manufacture viable, entail as many as 72 pieces with eight distinct shapes. It has recently been shown that simpler equivalents of some of the structures can be made with half a structure, when the effect of the missing half is replaced with that of a reflected anti-image in a ferromagnetic plane. In this manner, the number of parts is decreased to 36. Further reductions are possible by image formation of still smaller segments in perfectly diamagnetic superconducting mirrors. For the ultimate reduction, only nine of the original 72 structural segments are needed. Access to the magnetic field for electrical leads and other conduits is also greatly facilitated. In this paper, we describe and analyze several examples of such design simplification with combinations of superconducting and ferromagnetic mirrors.

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