Ion beam generating apparatus with electronic switching between

Details Ion beam generating apparatus with electronic switching between Ion beam generating apparatus with electronic switching between

1990-11-14

1992-02-18

Berman, Jack I.

Radiant energy

Ion generation

Field ionization type

250426, 31323141, H01J 304

Patent

active

050897071

ABSTRACT:
An ion generating apparatus utilizing a vacuum chamber with an anode and multiple, selectively operable, cathodes in the chamber. The vacuum chamber is grounded and all but the cathode or cathodes selected for use are grounded to the chamber. The anode is a high-transparency screen, preferably formed from a copper alloy. The cathodes are preferably arranged in a generally circular array, parallel to each other, so that any can be fired by a single trigger cathode assembly positioned adjacent to the array. A linear feed mechanism for moving any cathode toward the anode as cathode material is consumed may be provided.

REFERENCES:
patent: 2682611 (1954-06-01), Woodward et al.
patent: 3465192 (1969-09-01), Lafferty
patent: 3566185 (1971-02-01), Garvin
patent: 3665241 (1972-05-01), Spindt et al.
patent: 4424102 (1990-05-01), Toya et al.
patent: 4570106 (1986-02-01), Sohval et al.
patent: 4714860 (1987-12-01), Brown et al.
patent: 4939425 (1990-07-01), Bernardet

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