Variable strength beam line multipole permanent magnets and meth

Details Variable strength beam line multipole permanent magnets and meth Variable strength beam line multipole permanent magnets and meth

1980-04-24

1982-10-19

Anderson, Bruce C.

Radiant energy

With charged particle beam deflection or focussing

Magnetic lens

G21K 108, H01J 314

Patent

active

043552366

ABSTRACT:
An adjustable strength multipole permanent magnet is disclosed that comprises a plurality of axial layers of magnetic material wherein one layer can be angularly displaced with respect to an adjacent layer, each of said axial layers comprising a plurality of segments comprising an oriented, anisotropic,, permanent magnet material arranged in a ring, each segment having a predetermined easy axis orientation that is preferably determined by the formula:

REFERENCES:
patent: 3387241 (1968-06-01), Andoin et al.
patent: 3768054 (1973-10-01), Neugebauer
"A New Generation of Samarium Colbalt Quad. Magnets for Particle Beam Focussing Applications", Holsinger et al., Proc. Fourth Int. Workshop REC Perm. Mag. and Appl., (1979).
"Strong Rare Earth Colbalt Quad.", Halbach, IEEE Trans. on Nucl. Sci., NS--26, pp. 3882-3884, 6/79.
"Design of Permanent Multipole Magnets with Oriented Rare Earth Colbalt Material", Halbach, Nucl. Inst. Methal, 169, pp. 1-10, 1980.
"The Tipless Permanent Magnet Quadrupole Lenses", Lazarev et al., 1979 Linear Acc. Conf., 9/79.
"Rare Earth Permanent Magnets and Large Electrical Mach.", Parker, Third Int. Workshop REM Mag. and Appl., pp. 67-72, (6/78).

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