Accession Number : ADD008427

Title :   Multi-Arrayed Micro-Patch Emitter with Integral Control Grid.

Descriptive Note : Patent,


Personal Author(s) : Haas,George A ; Thomas,Richard E ; Greene,Richard F

Report Date : 03 Mar 1981

Pagination or Media Count : 5

Abstract : This invention relates to an electron emitter for microwave tubes and more particularly to a micro-patch emitter with an integral control grid positioned on the cathode surface relative to equally spaced pores or openings through which low-work-function material effuses and migrates onto the cathode surface adjacent the grid structure. A multi-arrayed electron emitter for microwave tubes in which the emitting surface is an array of continually replenished low-work-function regions, (micro-patches), whose boundaries include a control grid which is integral with the cathode surface and which controls emission from the low-work-function micro-patches. The continually replenished low-work-function regions are uniformly positioned relative to a matrix of uniformly spaced openings through which the low-work-function material is released.

Descriptors :   *Patents, *Cathodes(Electron tubes), *Tube grids, *Microwave tubes, Work functions, Integrated systems, Electron emission, Emission, Openings, Structures, Surfaces, Inventions, Functions, Cathodes, Grids, Work, Arrays, Control

Subject Categories : Electrical and Electronic Equipment
      Electricity and Magnetism

Distribution Statement : APPROVED FOR PUBLIC RELEASE