Apparatus for providing improved characteristics of a broad area

Details Apparatus for providing improved characteristics of a broad area Apparatus for providing improved characteristics of a broad area

1980-03-11

1982-05-04

Davie, James W.

Electric lamp and discharge devices

Cathode ray tube

Electron permeable window

372 74, H01J 3302, H01S 309

Patent

active

043284434

ABSTRACT:
An electron beam device having a vacuum chamber in which an electron beam generator generates a directed stream of electrons. An electron beam window comprising a foil which seals the vacuum chamber is in the path of the stream of electrons and permits passage of the stream of electrons into a working region exterior of the chamber and adjacent the electron beam window. An electrode is positioned closely adjacent the foil and a second electrode is spaced from the foil to form an elongated working or, in the case of a laser, a lasing region between them. The electrodes are maintained at a high electrical potential which, along with the electron beam, molecularly excites a gaseous working medium between the electrodes. The included angle of electrons passing through and scattered by the foil is limited and the electron beam confined to a desired region by an external shield or bezel overlying the foil. The bezel is provided with a series of openings which may be in the form of holes or slots of predetermined depth, size and spacing one from another to provide the electrons emerging from the foil with a desired included angle of emergence while maintaining losses at a minimum.

REFERENCES:
patent: 3702973 (1972-11-01), Daugherty et al.
patent: 3921098 (1975-11-01), Hoag
patent: 4061944 (1977-12-01), Gay

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