Electron beam generator

Details Electron beam generator Electron beam generator

1989-07-13

1990-12-25

Berman, Jack I.

Radiant energy

Ion generation

Field ionization type

313336, 313421, 313422, 313423, H01J 2946

Patent

active

049805584

ABSTRACT:
An electron beam generator or electron gun has a line-shaped cathode with a flattened tip as an electron source, a slotted diaphragm disposed in the plane of the cathode tip, and a double anode having two electrodes also fashioned as slotted diaphragms. The voltage potentials of the three slotted diaphragms, and their respective distances to the cathode, are selected such that a stigmatic virtual electron source at infinity is obtained.

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patent: 4804851 (1989-02-01), Nixon
patent: 4804887 (1989-02-01), Miyama et al.
patent: 4816724 (1989-03-01), Hamada et al.
patent: 4853587 (1989-08-01), Lamport et al.

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