Radiant energy – Ionic separation or analysis – Ion beam pulsing means with detector synchronizing means
Patent
1993-02-18
1994-04-05
Berman, Jack I.
Radiant energy
Ionic separation or analysis
Ion beam pulsing means with detector synchronizing means
250287, 250282, H01J 4914
Patent
active
053007735
ABSTRACT:
An ion mobility sensor for obtaining measurements of concentrations of constituents of multicomponent gaseous samples. The sensor having an ionization region into which the sample is entered connected to a drift region, the regions being separated by a grid electrode. A first electrode is disposed at an end of the ionization region opposite to the grid electrode. A collector electrode is provided at an end of the drift region opposite to the grid electrode and DC voltages are applied by the electrodes so as to create a unidirectional field across the sensor. A pulse of UV light is directed toward the grid electrode. A voltage pulse of selected magnitude is superimposed at the first electrode within the pulse width of the UV pulse. Ions characteristic of the sample travel through the grid electrode, across the drift region to the collector electrode. The electrical output in accordance with any ions received at the collector electrode is then measured.
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Berman Jack I.
Moran M. J.
Thermo King Corporation
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