Large area electron source

Details Large area electron source Large area electron source

2002-10-02

2004-06-15

Wells, Nikita (Department: 2881)

Radiant energy

Irradiation of objects or material

Ion or electron beam irradiation

C250S492100, C250S42300F, C250S42300F, C250S494100, C313S351000, C313S309000, C313S495000

Reexamination Certificate

active

06750461

ABSTRACT:

TECHNICAL FIELD
The present invention relates in general to sources of electrons, and in particular, to an electron beam source.
BACKGROUND INFORMATION
Electron beams can be used to sterilize medical instruments, food and packaging. Irradiation by electrons is an accepted medical treatment for certain skin cancers. Environmental uses are cleaning flue gasses and decontamination of medical waste. Industrial applications are drying of inks and polymer crosslinking.
Referring to
FIG. 1
, an electron source
100
generally consists of a hot filament
101
maintained at high voltage inside of a vacuum tube
102
and an exit window
103
. Because the window
103
is a fragile, thin foil, it must be somewhat small in size so that it does not tear under air pressure present due to the vacuum in the tube
102
.


REFERENCES:
patent: 5003178 (1991-03-01), Livesay
patent: 5414267 (1995-05-01), Wakalopulos
patent: 5557163 (1996-09-01), Wakalopulos
patent: 5909032 (1999-06-01), Wakalopulos
patent: 6163107 (2000-12-01), Itoh et al.

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