Electric lamp and discharge devices – With temperature modifier – For filament or heated cathode
Patent
1978-05-12
1980-02-19
Segal, Robert
Electric lamp and discharge devices
With temperature modifier
For filament or heated cathode
313 32, 313310, H01J 113, H01J 6152
Patent
active
041896564
ABSTRACT:
A cathode structure for a high power laser is formed from a first sheet of a hard metallic material such as molybdenum, which is joined to a second sheet of the same material by brazing, these first two sheets being brazed to a support structure of the same material. The first two sheets have a plurality of side by side longitudinal channels formed therein, the channels of one of these sheets being positioned between the channels of the other sheet (in a 180.degree. spatial phase relationship therewith). Crosswise channels are provided along opposite edges of both of the sheets to provide fluid communications to the opposite ends of the longitudinal channels. A cooling liquid such as water is fed to the transverse channels, and circulated through the longitudinal channels in parallel to effect efficient cooling of the cathode. The cathode is assembled by placing a thin foil of brazing material, such as a suitable gold/copper
ickel alloy, between the two channeled sheets and between one of the sheets and the support plate. Thin wires of hard material such as molybdenum are tack welded to the foil surfaces facing the channeled sheets, these wires running parallel to each other and normal to the direction of the channels. This structure is then placed in an airtight compartment and pressed between die surfaces. The compartment is then evacuated and the dies heated such as by electrical resistance to melt the brazing material and braze the cathode parts together to form an integral unit.
REFERENCES:
patent: 2227039 (1940-12-01), Smith et al.
Biricik Vahram W.
Chun Kang R.
Gresko Laurence S.
Northrop Corporation
Segal Robert
Sokolski Edward A.
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