Hollow substantially hemispherical permanent magnet high-field flux source
AssigneeThe United States of America as represented by the Secretary of the Army
InventorHerbert A. Leupold
Life of this patent
Estimating the term…
Abstract
A hollow hemispherical flux source produces a uniform high-field in its central cavity. The hemisphere is comprised of a selected magnetic material whose magnetization is azimuthally symmetrical. The magnetic orientation (.alpha.) in the hemispherical permanent magnet shell is given by the equation: .alpha.=2.theta. where .theta. is the polar angle. A planar plate of high saturation, high permeability material closes the open end of the hemisphere. An axial bore hole through the hemisphere and/or through the planar plate provides the requisite accessability.
Claims11
A permanent magnet structure comprising a hollow substantially hemispherical magnetic flux source for producing a substantially uniform high-field in its central cavity, said hemispherical flux source being azimuthally symmetrical in magnetization, the magnetic orientation (.alpha.) in the substantially hemispherical magnetic shell being given by the equation .alpha.=2.theta., where .theta. is the polar angle, and a planar plate of high saturation, high permeability material upon which said hemispherical flux source is placed so that said plate closes the open end thereof.
Dependencies are inferred from the claim text.