Zotov

The authors developed a design technique of a two-sectional primary measuring converter for the air ion counter with complex spectral structure. Primary measuring converter providing mobility separation of air ions was proposed as a basic element of the small-sized air ion spectrometer. The proposed technique allows to estimate behavior of air ions in the measuring chamber representing a two-chamber cylindrical condenser, and to calculate values of the current created by a stream of air ions through the chosen cylindrical site of the measuring chamber. It also allows one to separate air ions by mobility over their sedimentation in different chambers of the primary measuring converter.

In this paper numerical calculation of values of light negative air ion (LNAI) stream was carried out for a cylindrical geometrical model in the COMSOL Multiphysics 4.0. on the basis of the solution of the Fick equation. The relative error of a light negative air ion stream appearing with simplification of geometrical model of the upper respiratory tracts from a tore segment to the cylinder didn't exceed 5,3 %. Possibility of use of a cylindrical model of the upper respiratory tracts was proved by means of experimental studies of streams of the light negative air ions (LNAI) settling on walls of the upper respiratory tracts of an average person.