Large-area electron irradiator with improved electron injection

Details Large-area electron irradiator with improved electron injection Large-area electron irradiator with improved electron injection

1996-09-23

1998-07-21

O'Shea, Sandra L.

Electric lamp and discharge devices

Cathode ray tube

Electron permeable window

313299, 313302, 313304, 313348, 313447, H01J 2970, H01J 146, H01J 2110, H01J 2946

Patent

active

057839000

ABSTRACT:
A broad-beam high energy electron accelerator has an electron injection section arranged for increased current density with greater uniformity and higher transmission through the foil exit window. A plurality of cathode rods are disposed in a transverse plane and spaced at about 2.4 cm, and a reflector plate behind the cathode rods is biased negative relative thereto. A planar control grid is disposed distal of said cathode rods and a screen grid is disposed parallel to and distal of the control grid. Field-shaping wires are disposed in a plane parallel to the plane of the cathode rods and between the same and the reflector plate, with the respective field-shaping wires being disposed parallel to said rods and midway between them. The same positive bias (e.g., 11 kV) is applied to both the control grid and the field-shaping wires.

REFERENCES:
patent: 3863163 (1975-01-01), Farrell et al.
patent: 3956712 (1976-05-01), Hant
patent: 4048534 (1977-09-01), Brewer et al.
patent: 4061944 (1977-12-01), Gay
patent: 4079328 (1978-03-01), Cleland et al.
patent: 4873460 (1989-10-01), Miram et al.
patent: 4952814 (1990-08-01), Huntzinger
patent: 5489783 (1996-02-01), Kristiansson

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