Thermionic emission cathode having a tip of a single crystal of

Details Thermionic emission cathode having a tip of a single crystal of Thermionic emission cathode having a tip of a single crystal of

1976-04-12

1977-10-25

Chatmon, Jr., Saxfield

Electric lamp and discharge devices

Electrode and shield structures

Cathodes containing and/or coated with electron emissive...

252509, 252521, 313336, H01J 114, H01J 1906, H01K 104

Patent

active

040557804

ABSTRACT:
A single crystal of lanthanum hexaboride is used as a tip of a thermionic emission cathode.

REFERENCES:
patent: 3312856 (1967-04-01), Lafferty et al.
patent: 3462635 (1969-08-01), Broers
patent: 3631291 (1971-12-01), Favreau
patent: 3823337 (1974-07-01), Van Stratum et al.
patent: 3833494 (1974-09-01), Van Stratum et al.
patent: 3928783 (1975-12-01), Hosoki et al.
patent: 3932314 (1976-01-01), Kawabe et al.
patent: 3944866 (1976-03-01), Sayer
"LaB.sub.6 Single-Crystal Tips as an Electron Source of High Brightness" by R. Shimizu & Kataoka - Applied Physics Letters, vol. 27, No. 3, pp. 113-114, Aug. 1975.
"Materials and Techniques for Electron Tubes" by Kohl., General Telephone & Electronics Technical Series" TK 6565, V3, K65, 1960, C4, pp. 548-550.

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