Transport of ions in sources with ionization at atmospheric pressure. I. Substantive geometry

The experimental study and theoretical estimates of the influence of the geometric and electrical parameters of ion sources with ionization at atmospheric pressure on ion transport from the ionization site to the entrance to the analyzer vacuum interface are carried out. he possibility of efficient control of the ion flux with minimal possible losses in a dense gas is shown. It was found out that the main source of ion loss during transport in a stationary gas is the motion along the lines of force of the electric field closing at the edges of the holes of the electrodes in the ion source. The effect of scattering of the ion flux in a dense gas and space charge is of secondary importance in the investigated ion source geometry and conditions.