ION MOBILITY SPECTROMETER Russian patent published in 2012 - IPC H01J49/40 

FIELD: physics.

SUBSTANCE: ion mobility spectrometer has a reaction chamber (1), a drift electrode (2) and an ion detector (3). The reaction chamber (1) is fitted with an input port (4) for feeding the analysed substance in a mixture with a carrier gas and a corona discharge source made in form of segment of a hemisphere (5) on whose inner surface facing the drift electrode (2) there are metal spikes (6) with small curvature radius at the apex of the spikes. A controlled grid valve (7) is placed between the ion source and the drift electrode (2). The drift electrode (2) is made from high-resistivity material with resistivity in the range of (0.3-2.0)×10⁴ ohm×m, and is connected to a drift voltage (8) source. An ion detector (3) is placed at the output of the drift electrode (2).

EFFECT: high resolution of the spectrometer.

12 cl, 2 dwg