Ion source

Details Ion source Ion source

1984-11-07

1990-02-13

Yusko, Donald J.

Electric lamp and discharge devices

With positive or negative ion acceleration

H01J 102

Patent

active

049009745

ABSTRACT:
An EHD ion source includes an extractor and a control electrode with extractor being disposed below a tip of an electrode, and functioning to apply an electric field to a substance to-be-ionized wetting a pointed end of the tip, so as to derive ions from the pointed tip end. The control electrode is disposed in the vicinity of the pointed end of the tip, and it functions to apply an electric field to the substance to-be-ionized in its molten state so as to supply the pointed tip end with the substance to-be-ionized in a suitable amount. As a result, a great ion current which is substantially proportional to an extracting voltage can be derived from the pointed tip end.

REFERENCES:
patent: 3814975 (1974-06-01), Wolfe et al.
patent: 4088919 (1978-05-01), Clampitt et al.

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