Industrial hollow cathode with radiation shield structure

Details Industrial hollow cathode with radiation shield structure Industrial hollow cathode with radiation shield structure

2006-01-25

2010-02-23

Williams, Joseph L (Department: 2889)

Electric lamp and discharge devices

With positive or negative ion acceleration

C313S362100, C313S231310, C313S015000

Reexamination Certificate

active

07667379

ABSTRACT:
In accordance with one embodiment of the present invention, the hollow-cathode apparatus comprises a small-diameter tantalum tube with a plurality of tantalum-foil radiation shields, wherein the plurality of shields in turn comprise one or more spiral windings external to that tube and approximately flush with the open end from which electron emission takes place. The axial length of at least one of the inner windings (closer to the tantalum tube) is equal to or less than approximately half the length of the tantalum tube. An enclosed keeper surrounds the cathode. To start the cathode, a flow of ionizable inert gas, usually argon, is initiated through the cathode and out the open end. An electrical discharge is then started between the keeper and the hollow cathode. When heated to operating temperature, electrons exit from the open end of the hollow cathode.

REFERENCES:
patent: 4218633 (1980-08-01), Mirtich et al.
patent: 4296330 (1981-10-01), Thomson et al.
patent: 4461970 (1984-07-01), Anderson
patent: 4800281 (1989-01-01), Williamson
patent: 4862032 (1989-08-01), Kaufman et al.
patent: 5359254 (1994-10-01), Arkhipov et al.
patent: 5587093 (1996-12-01), Aston
patent: 5898178 (1999-04-01), Bunker
patent: 6380685 (2002-04-01), Patterson et al.

Affiliated with

Also associated with

Rating

Industrial hollow cathode with radiation shield structure does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Industrial hollow cathode with radiation shield structure, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Industrial hollow cathode with radiation shield structure will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-4231201