Triangular section permanent magnetic structure

Details Triangular section permanent magnetic structure Triangular section permanent magnetic structure

1990-04-25

1991-05-07

Harris, George

Electricity: magnetically operated switches, magnets, and electr

Magnets and electromagnets

Electron or ion beam deflecting type

335306, 315 35, H01F 700

Patent

active

050140280

ABSTRACT:
The invention disclosed herein is a permanent magnet structure which is uul in focusing or guiding charged particle beams, such as those employed in traveling wave tubes, wigglers and undulators. The magnets are annular or planar in shape and have a cross-sectional configuration which is triangular in shape. The cross section forming the triangular magnet sections is that plane which contains the linear beam path and intersects the magnets. The magnetizations of the magnets are oriented perpendicular to the magnetizations of adjacent magnets such that no magnetic poles exist on the outer surface of the permanent magnetic structure.

REFERENCES:
patent: 2799813 (1957-07-01), Rademakens et al.
patent: 3168686 (1965-02-01), King et al.
patent: 3205415 (1965-09-01), Seki et al.
patent: 3768054 (1973-10-01), Neugebauer
patent: 4614930 (1986-09-01), Hickey et al.

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