Electron attachment apparatus and method

Details Electron attachment apparatus and method Electron attachment apparatus and method

1985-11-12

1987-12-15

Howell, Janice A.

Radiant energy

Ion generation

Field ionization type

250283, 250424, 250427, H01J 2724

Patent

active

047135484

ABSTRACT:
Apparatus which can be used for producing negative ions in a gaseous or liquid fluid is disclosed, as well as methods of using the apparatus to determine electron attachment parameters, to identify species in the fluid, or to separate selected species from the fluid. The apparatus comprises a photoelectron emitter, including a UV light source, which can be operated in pulsed or continuous modes, and a photocathode; in addition, a radially-spaced, coaxial negative ion collector, including a negative ion receiving plate, at least one of the photocathode and the receiving plate having cylindrical configuration.

REFERENCES:
patent: 3313971 (1967-04-01), Nagy
patent: 4574004 (1986-03-01), Schmidt-Ott et al.

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