Large area directly heated lanthanum hexaboride cathode structur

Details Large area directly heated lanthanum hexaboride cathode structur Large area directly heated lanthanum hexaboride cathode structur

1987-10-14

1989-01-03

Moore, David K.

Electric lamp and discharge devices

Electrode and shield structures

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

313351, 313356, 313341, 313 51, H01J 114, H01J 116, H01J 1910

Patent

active

047959401

ABSTRACT:
A large area directly heated lanthanum hexaboride (LaB.sub.6) cathode system (10) is disclosed. The system comprises a LaB.sub.6 cathode element (11) generally circular in shape about a central axis. The cathode element (11) has a head (21) with an upper substantially planar emission surface (23), and a lower downwardly and an intermediate body portion (26) which diminishes in cross-section from the head (21) towards the base (22) of the cathode element (11). A central rod (14) is connected to the base (22) of the cathode element (11) and extends along the central axis. Plural upstanding spring fingers (37) are urged against an outer peripheral contact surface (24) of the head end (21) to provide a mechanical and electrical connection to the cathode element (11).

REFERENCES:
patent: 3617687 (1971-11-01), Katawoka
patent: 4054946 (1977-10-01), Ferris et al.
patent: 4258283 (1981-03-01), Brunger et al.
patent: 4346325 (1982-08-01), Nakasuji et al.
patent: 4363995 (1982-12-01), Takigawa et al.
patent: 4468586 (1984-08-01), Hohn
patent: 4486684 (1984-12-01), Hohn
patent: 4528474 (1985-07-01), Kim
patent: 4585971 (1986-04-01), Clegg
patent: 4675573 (1987-06-01), Miram et al.
Directly Heated Lanthanum Hexaboride Cathode; Sci. Instrum.; 4/3/86; Leung et al.; pp. 1274-1276.
Directly Heated LaB.sub.6 Cathodes for Ion Source Operation; Vacuum; 11/12/86; Leung; vol. 36, pp. 865-867.
Lanthanum Hexaboride Tapered Filament in a Plasma Ion Source Rev. Sci. Instrum.; Pincosy et al.; pp. 655-658; 1/14/85.
Directly Heated Lanthanum Hexaboride Filaments; Rev. Sci. Instrum.; 3/14/84; Leung et al.; pp. 1064-1068.

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