Numerical simulations of storage and thermometry of small biomolecular ions in a 16-pole ion trap and a 16-wire ion trap

This work focuses on numerical simulations of ion dynamics of small biomolecular ions (m/z similar to 200) under the influence of elastic collisions with a buffer gas in a 16-pole ion trap and a 16-wire ion trap. A comparison between effective potentials in these trap configurations is provided. Particular emphasis is placed on studying storage efficiency and ion temperature in both traps. The dependence of ion temperature on various trapping parameters is discussed. It is found that the optimum operating range in terms of storage efficiency in a wire trap is limited compared to that in a pole trap and exhibits higher sensitivity to various parameters at low temperatures. However, with a proper choice of the operating parameters, the wire trap can serve as a practical alternative to the conventional design of a multipole ion trap while providing the lateral optical access, which will open a new window for spectroscopic studies with such traps.

Automated summary

This study focused on numerical simulations of ion dynamics of small biomolecular ions in a 16-pole ion trap and a 16-wire ion trap under the influence of elastic collisions with a buffer gas. The comparison of effective potentials in these trap configurations was provided, with particular emphasis on storage efficiency and ion temperature. It was found that while the wire trap has a limited optimum operating range for storage efficiency compared to the pole trap, it can serve as a practical alternative with proper choice of operating parameters and lateral optical access for spectroscopic studies.