One-dimensional grid mesh for a high-compression electron gun

Details One-dimensional grid mesh for a high-compression electron gun One-dimensional grid mesh for a high-compression electron gun

2007-06-28

2009-12-01

Song, Hoon (Department: 2882)

X-ray or gamma ray systems or devices

Source

Electron tube

C378S138000

Reexamination Certificate

active

07627087

ABSTRACT:
A field emitter electron gun includes at least one field emitter cathode deposited on a substrate layer and configured to generate an electron beam. An extraction plate having an opening therethrough is positioned adjacent to the at least one field emitter cathode and is operated at a voltage so as to extract the electron beam out therefrom. A meshed grid is disposed between each of the at least one field emitter cathodes and the extraction plate. The meshed grid is configured to operate at a voltage so as to enhance an electric field at a surface of the at least one field emitter cathode. The meshed grid is a one-dimensional grid configured to focus the electron beam received from the at least one field emitter cathode into a desired spot size.

REFERENCES:
patent: 4521901 (1985-06-01), Rand
patent: 5907595 (1999-05-01), Sommerer
patent: 6553096 (2003-04-01), Zhou et al.
patent: 2005/0175151 (2005-08-01), Dunham et al.
patent: 2006/0274889 (2006-12-01), Lu et al.
patent: 2008/0084152 (2008-04-01), Dijon et al.

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