Miniaturized ion mobility spectrometer sensor cell

Details Miniaturized ion mobility spectrometer sensor cell Miniaturized ion mobility spectrometer sensor cell

1997-10-07

1999-10-12

Berman, Jack I.

Radiant energy

Ionic separation or analysis

Ion beam pulsing means with detector synchronizing means

H01J 4940

Patent

active

059658827

ABSTRACT:
An improved ion mobility spectrometer for detecting chemical warfare agents and hazardous vapors. The ion mobility spectrometer has an improved sensor cell that includes a heated air flow assembly, an ionization assembly and a field electrode and detector assembly printed circuit assembly. The heated air flow assembly includes a cover with an air inlet, an ambient temperature sensor, a thin-film heater element, a heater frame, a heated air sensor, and a heater channel formed therein. The ionization assembly comprises a nuclear ionization source attached to a holder, a lid, and an ionization channel formed therein that is coupled to the heater channel. The field electrode and detector assembly printed circuit assembly comprises a field electrode printed circuit board, a detector electrode printed circuit board, and detector electronics. The field electrode printed circuit board has a plurality of field electrodes disposed on a bottom surface thereof. A gasket is disposed between the field electrode and detector electrode printed circuit boards. The detector electrode printed circuit board has a plurality of detector electrodes disposed on a top surface thereof. The detector electronics processes current outputs of the detector electrodes to generate a histogram of ion currents that identify mobilities of chemical species tested by the ion mobility spectrometer.

REFERENCES:
patent: 4390784 (1983-06-01), Browning et al.
patent: 5455417 (1995-10-01), Sacristan

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