Optimization of ion transport from atmospheric pressure ion sources
An experimental study and numerical calculations of the influence of geometric and electrical parameters of ion sources with ionization at atmospheric pressure on the motion of ions from ionization site to an entrance orifice were carried out. The effect of space charge on the current-voltage characteristics of an electrode configuration of the ion source was experimentally shown. The results of numerical calculations of ion motion with allowance for the space charge in a stationary ion flow based on the statistical diffusion simulation model were shown to agree well with the experiment. The possibility of 100% ion transportation from the ionization area to a collector was demonstrated experimentally and numerically.
KeywordsIon flow Space charge Corona discharge Ion source with ionization at atmospheric pressure
The work was carried out at the Institute for Analytical Instrumentation of the Russian Academy of Sciences, Saint Petersburg, within the research project “New mass spectrometric approaches to medical diagnostics and study of isotope effects in biology and development of the fundamental elements of mass spectrometers for their implementation” (FASO ISST number: 0074-2014-0012 State registration number: AAAA-A16-116041310010-6).
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