Apparatus for irradiating material by an electron beam

Details Apparatus for irradiating material by an electron beam Apparatus for irradiating material by an electron beam

1985-12-03

1987-05-05

Anderson, Bruce C.

Radiant energy

With charged particle beam deflection or focussing

With target means

250396R, 2504923, 250437, 3133601, 3133611, G01K 108

Patent

active

046635327

ABSTRACT:
The invention relates to an apparatus for irradiating material by an electron beam. The apparatus comprises guidance means for placing the material on the path of the beam, an electron gun provided in a tight enclosure having a shape with a symmetry or revolution with respect to an axis, an electron-emitting filament located in the axis of the enclosure, as well as a Wehnelt electrode surrounding the filament. It is provided with a first circular slot for concentrating electrons in the vicinity of the said slot and an electron accelerating electrode surrounding the Wehnelt electrode and having a second circular slot facing the first slot. The enclosure comprises a tightly closed circular window which is transparent to the electrons and which faces the two slots.

REFERENCES:
patent: 2289071 (1942-07-01), Ramo
patent: 2313018 (1943-03-01), Krause
patent: 2452893 (1948-11-01), Bachman
patent: 3974391 (1976-08-01), Offermann
patent: 4514638 (1985-04-01), Lischke et al.

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