Analytical and Numerical Modeling of Ion Mass-Analyzers with Planar Discrete Electrodes

Abstract

The properties of the space-time focusing of non-monopolar ions in two-dimensional linear radio-frequency electric fields are examined. The computer modeling results of electrode systems' various versions with a linear radio-frequency field in the analyzer' working area are given. It is shown that the most efficient is a flat-electrode mass analyzer with a linear-discrete distribution at a radio-frequency potential. Ion-optical systems with linear radio-frequency electric fields are proposed. Numerical modeling showed the possibility of achieving a resolution of $\mathrm{R} > 10^{3}$ with an ion energy spread up to $\mathrm{W}_{\max}/\mathrm{W}_{\min}=2$, initial coordinates $\mathrm{x}_{\min}/\mathrm{x}_{\max}=2$, entrance angles $\vert {\alpha}\vert < 2^{\circ}$ (Abstract)