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Journal of The American Society for Mass Spectrometry

, Volume 30, Issue 9, pp 1813–1823 | Cite as

A Simple Printed Circuit Board–Based Ion Funnel for Focusing Low m/z Ratio Ions with High Kinetic Energies at Elevated Pressure

  • Florian SchlottmannEmail author
  • Maria Allers
  • Ansgar T. Kirk
  • Alexander Bohnhorst
  • Stefan Zimmermann
Research Article

Abstract

Ion funnels are one of the key components for transferring ions from higher pressure into the vacuum. Typically, ion funnels are constructed of several different plate ring electrodes with a decreasing inner diameter where radio frequency (RF) voltages and electric DC fields are applied to the electrodes to focus and transport ion clouds. In this work, we developed and investigated a simple and low-cost ion funnel design that is based on standard printed circuit boards (PCB) with integrated planar electrodes including the signal distribution network. This ion funnel is capable of withstanding high electric fields with superimposed RF voltages due to its buried capacitors. To evaluate the ion focusing efficiency of the ion funnel, we simulated the movement of ions inside this funnel and experimentally evaluated the ion transfer. Our simulations show that a rectangular ion funnel like the PCB ion funnel has similar performance compared with conventional stacked ring funnels. Due to the hundredfold lower parasitic capacitance between the planar electrodes compared with conventional ion funnels, high RF voltage amplitudes up to 195 V and reduced electric DC field strengths up to 100 Td can be reached at a frequency of about 5 MHz. Thus, the funnel is appropriate to focus light ions at elevated pressures up to 20 mbar.

Graphical Abstract

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Keywords

Electrodynamic ion funnel Printed circuit board Rectangular ion funnel Low m/z ratio Low parasitic capacitance 

Notes

Acknowledgements

This work was funded by the Deutsche Forschungsgemeinschaft (DFG, German Research Foundation) – ZI 1288/8-1.

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Copyright information

© American Society for Mass Spectrometry 2019

Authors and Affiliations

  1. 1.Institute of Electrical Engineering and Measurement Technology, Department of Sensors and Measurement TechnologyLeibniz University HannoverHannoverGermany

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