Uniform High-Field Permanent-Magnet Structures.
Patent Application, Filed 27 May 88,
DEPARTMENT OF THE ARMY WASHINGTON DC
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A hollow spherical flux source produces a uniform high field in its central cavity. The sphere is comprised of a selected magnetic material whose magnetization is azimuthally symmetrical. The magnetic orientation alpha in the spherical permanent magnet shell is given by the equation alpha Z Theta where Theta is the polar angle.
- Electricity and Magnetism