Permanent magnet edge-field quadrupole

Details Permanent magnet edge-field quadrupole Permanent magnet edge-field quadrupole

1994-03-29

1997-01-21

Phillips, Michael W.

Electricity: magnetically operated switches, magnets, and electr

Magnets and electromagnets

Magnet structure or material

335304, 335210, 335212, H01F 700, H01F 702

Patent

active

055963048

ABSTRACT:
Planar permanent magnet edge-field quadrupoles for use in particle accelerating machines and in insertion devices designed to generate spontaneous or coherent radiation from moving charged particles are disclosed. The invention comprises four magnetized rectangular pieces of permanent magnet material with substantially similar dimensions arranged into two planar arrays situated to generate a field with a substantially dominant quadrupole component in regions close to the device axis.

REFERENCES:
patent: 4549155 (1985-10-01), Halbach
E. Regenstreif, "Focusing With Quadrupoles, Doublets, And Triplets", Focusing of Charged Particles, vol. 1, 1967, pp. 354-410.
K. Halbach, "Design of Permanent Multipole Magnets with Oriented Rare Earth Cobalt Material", Nuclear Instruments and Methods, 169, 1980, pp. 1-10.

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