SIMULATION OF CYLINDRICAL RF ION GUIDES USING ANALYTICAL ELECTRIC FIELDS

The article explores the qualitative properties of cylindrical radio frequency ion guides used to convey ions. Analytical expressions for electric fields obtained earlier, and the theory of pseudo-potential motion of charged particles in RF electric fields, are used here. Different operating modes of RF ion guides are considered: with a phase π for RF voltages applied between neighboring electrodes, with a phase π / 2 for RF voltages applied between neighboring electrodes, with 100% sinusoidal amplitude modulation of sinusoidal RF voltages to provide the A-wave effect. The influence of high order nonlinear spatial harmonics of the considered electric fields for isolation, transportation and focusing of charged particles (ions) is investigated as well.