[On-drift spectrometer with double successive separation with ionization in the corona discharge].

An experimental high-resolution ion-drift spectrometer is described. Operating characteristics were improved by installation of a second grid gate in the center of the drift space. The ion-drift analyzer setups and the ranges of amplitude, length and temporary delay of control impulses were identified in the course of testing. The article gives illustration of mobility spectrum in case of a single or paired gate analysis.