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J Am Soc Mass Spectrom. 2018 Nov;29(11):2173-2181. doi: 10.1007/s13361-018-2032-9. Epub 2018 Aug 1.

Multi-electrode Harmonized Kingdon Traps.

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Skolkovo Institute of Science and Technology, Moscow, Russian Federation.
Skolkovo Institute of Science and Technology, Moscow, Russian Federation.
Ryazan Radiotechnical University, Ryazan, Russian Federation.
Microsystems Technology Laboratories, Massachusetts Institute of Technology, Cambridge, MA, USA.


Based on the analysis of the results of the study of various designs of multi-electrode harmonized Kingdon traps, we propose a new type of trap with two merged internal electrodes that has the ability to capture and accumulate ions formed inside. We also investigated the influence of inaccuracies in the manufacture of the electrodes on the field inside such trap. The four-electrode trap, which actually degenerates into a two-electrode device with traces of two other electrodes present at the ends of the internal electrodes (their splitting) has been found as the less sensitive to inaccuracies caused by manufacturing and cutting the ends of trap electrodes. We show that a mass spectrometer with a relatively high resolving power can be created on the basis of such a trap. The creation of the traps requires the manufacture of complex electrodes with demanded accuracy of their surfaces. This becomes possible with the advent of 3D printers. Graphical Abstract Multi electrode harmonize Kingdon trap with fused elctrode pares.


Electrostatic ion trap; FT-MS; Fourier transform; High resolution; Mass analyzer; Simulation


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