SOME  SPECIFIC  FEATURES  OF  SIMION 7 3D  SIMULATION 
SOFTWARE APPLICATION  TO  COMPUTATION  OF  QUADRUPOLE 
MASS  ANALYZER  ANALYTICAL  CHARACTERISTICS

A. G. Kuzmin, P. V. Mikhnovets

Institute for Analytical Instrumentation RAS, Saint-Petersburg

    The general principles of quadrupole mass analyzer modeling using the ion optics simulation software SIMION 7 3D were analyzed. A model of quadrupole mass analyzer with circular electrodes was developed. The shape of the mass peak was calculated. The influence of the mass analyzer operating mode and  length on transmission was investigated. The data obtained were compared with analytical theory and data of numerical calculations. Good agreement was observed.