Cathode structure and method of operating the same

Details Cathode structure and method of operating the same Cathode structure and method of operating the same

H - Electricity

01

J

313/167

H01J 29/04 (2006.01) H01J 1/20 (2006.01)

Patent

CA 1098578

RCA 68,973/68,973A CATHODE STRUCTURE AND METHOD OF OPERATING THE SAME ABSTRACT An insulating substrate is provided with a plurality of discrete electrode pads on a surface thereof. A thermionic line cathode, e.g., a directly heated filament, is positioned to one side of the substrate surface and extends across a surface of each one of the electrode pads. An apertured electrode is positioned in spaced relation to the cathode and the electrode pads. The apertured electrode may include a single slit-shaped aperture or a plurality of colinear apertures. The structure may also include a pair of spaced parallel filter plates whose surfaces are disposed in parallel relation to the longitudinal axis of the line cathode and in orthogonal relation to the surfaces of the electrode pads. The filter plates function to collimate the electron flow emitted from the cathode. -1-

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