Permanent magnet field sources of conical orientation

Claim 1

A permanent magnet structure comprising: a radial magnetic field source which comprises a cylinder with a cavity disposed therein, the cylinder being fabricated of magnetically rigid material, having a magnetization perpendicular to an axis of the cavity and being formed by a pair of radially magnetized discs which vary in thickness with distance from a center of the disc and which are fabricated of magnetically rigid material, coaxially aligned parallel to and separated from each other at a given distance, an iron ring cylinder circumscribing and contacting the discs, and cladding magnets which cover each disc and which have a magnetization directed away from the cylinder in a direction parallel to the axis of the cavity; and an axial magnetic field source which comprises a cylinder with a cavity disposed therein, the cylinder being fabricated of magnetically rigid material, having a magnetization parallel to the axis of the cavity, and being formed by a plurality of magnetized segments fabricated of magnetically rigid material, each magnetized segment being substantially circular and having a triangular cross-section, the magnetized segments being arranged to construct a hollow cylinder and closures on both ends thereof, forming the cavity therein and having a magnetic field parallel to the axis of the cavity; the axial magnetic field source being nested within the radial magnetic field source thereby producing a conical magnetic field in the cavity of the axial magnetic field source.