Analyzer of Charged Particles Based on the Electrostatic Quadrupole-Cylindrical Field in the «Axis-Ring» Focusing Regime

Abstract

The motion of charged particles in an electrostatic axially-symmetrical quadrupole-cylindrical field, formed by a superposition of electrostatic fields of a cylindrical mirror and a circular quadrupole, is studied. A numerical model of the energy analyzer based on quadrupole-cylindrical field is obtained. The second-order angular focusing of “axis-ring” type is found. The focusing properties of the quadrupole-cylindrical mirror energy analyzer are determined by numerical methods for calculation particle motion trajectories.