Periodic permanent magnet structure with increased useful field

Details Periodic permanent magnet structure with increased useful field Periodic permanent magnet structure with increased useful field

1987-08-24

1988-03-15

Harris, George

Electricity: magnetically operated switches, magnets, and electr

Magnets and electromagnets

Electron or ion beam deflecting type

335306, 315 535, H01F 700

Patent

active

047315989

ABSTRACT:
A device is disclosed which uses permanent magnets to manipulate charged ticle beams, such as those employed in traveling wave tubes, wigglers, and undulators. Tapered pole pieces are inserted between magnets in a periodic permanent magnet array, and the taper is oriented away from the beam path. The magnets themselves may also be tapered, but the taper is oriented toward the beam path. Tapering is described according to the cross sections formed when the plane which contains the beam path intersects the magnets and pole pieces.

REFERENCES:
patent: 3168686 (1965-02-01), King et al.
patent: 4647887 (1987-03-01), Leupold
patent: 4654618 (1987-03-01), Leupold
patent: 4701737 (1987-10-01), Leupold

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