Optimization of Performance of Toroidal Ion Trap with Trianglar Electrode by Theoretical Simulation

Owing to the ion storage capacity far superior to that of three-dimensional ion trap of the same volume, toriodal ion trap is deemed to be another useful candidate of miniaturization of ion trap mass analyzer in recent years. To further optimize the performance of mass spectrometry of toriodal ion trap, especially the ion detection efficiency and the mass resolving power, a new toriodal ion trap built with triangular electrodes was proposed and investigated theoretically. The new toroidal ion trap was composed of two identical ring electrodes with triangular cross section and two cylindrical electrodes of different sizes. Ions were extracted from the ion trap through resonance excitation for mass analysis. The asymmetrical triangular electrode structure was obtained through theoretical simulation and optimization of ion detection efficiency and mass resolving power. The mass resolution (M/ΔM) of ∼1500 at m/z 609 was obtained for a toriodal ion trap with an optimal electrode structure.

Graphical AbstractThe new toroidal ion trap was composed of two identical ring electrodes with asymmetrical triangular cross section and two cylindrical electrodes. The mass resolution (M/ΔM) of ∼1500 at m/z 609 was obtained with an optimal electrode structure.Figure optionsDownload as PowerPoint slide