Apparatus for simultaneous detection of positive and negative io

Details Apparatus for simultaneous detection of positive and negative io Apparatus for simultaneous detection of positive and negative io

1981-05-21

1984-04-24

Smith, Alfred E.

Radiant energy

Invisible radiant energy responsive electric signalling

Including a radiant energy responsive gas discharge device

250287, 250381, 250385, G01N 2766

Patent

active

044450389

ABSTRACT:
An ion mobility detector has dual drift regions respectively on either side of a centrally located reaction region and respectively separated therefrom by dual shutter grids. Each drift region terminates in a Faraday cup. An ion accelerating electrical field gradient is provided between the Faraday cups so that negative ions are drawn into one drift region and positively charged ions are drawn into the other drift region.

REFERENCES:
patent: 2999157 (1961-09-01), Rosenstock
patent: 3307033 (1967-02-01), Vestal
patent: 3626180 (1971-12-01), Carroll et al.
patent: 3626181 (1971-12-01), Wernlund
patent: 4136280 (1979-01-01), Hunt et al.
patent: 4266127 (1981-05-01), Chang
Guthrie, ed., "Vacuum Equipment and Techniques", McGraw-Hill, N.Y., 1949, pp. 4-7.

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