Superconducting shielded PYX PPM stacks

摘要

Periodic permanent magnet structures comprise a plurality of paired axially aligned segments of transversely sliced or truncated hollow cylindrical flux sources each of which produces a uniform high-field in its central cavity. Each pair of segments is mounted on opposite sides of a respective plate of permeable material. The magnetic field orientations in the central cavities are axially directed and alternate or reverse in direction from segment to segment. An axial bore hole drilled through the segments and plates provides a continuous channel or path through which a beam of charged particles will travel.