DIFFERENTIAL ION MOBILITY SPECTROMETER Russian patent published in 2013 - IPC H01J49/40 

FIELD: physics.

SUBSTANCE: differential ion mobility spectrometer has a cylindrical chamber for generating analyte ions, an ionisation source, in the region of which there is generation of reactant ions, an electrode system, an ion aperture, an analytical gap formed by two concentric cylindrical electrodes, an ion detector, a periodic polarity-asymmetric voltage generator, which provides an output on a section of a nonlinear field relationship of ion mobility, a compensating voltage source, a high-frequency voltage source, concentrically arranged relative the inner cylindrical electrode of an additional chamber, having an input and an output for ionising gas, in which there is an ionisation source and an ejecting voltage source is connected.

EFFECT: improved stability and reproducibility of results of analysing gaseous media, longer operating life of the ioniser.

6 cl, 1 dwg