Cathode assembly for indirectly heated cathode ion source

Details Cathode assembly for indirectly heated cathode ion source Cathode assembly for indirectly heated cathode ion source

2007-10-02

2007-10-02

Patel, Vip (Department: 2879)

Electric lamp and discharge devices

Cathode ray tube

Ray generating or control

Reexamination Certificate

active

09826274

ABSTRACT:
A cathode in an indirectly heated cathode ion source is supported by at least one rod or pin. The cathode is preferably in the form of a disk, and the support rod is smaller in diameter than the disk to limit thermal conduction and radiation. In one embodiment, the cathode is supported by a single rod at or near its center. The support rod may be held by a spring-action clamp for simple and reliable clamping and unclamping. The disk shaped cathode and the support rod may be fabricated as a single piece. A filament that emits electrons thermionically may be disposed around the rod in close proximity to the cathode.

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