This custom-built instrument was redesigned to improve sensitivity and acquisition speed, and to provide an optimized platform for future instrumentation development.
The instrument was designed around custom vacuum chambers for improved ion optical alignment, minimized distance from the external ion trap to magnetic field center, and high conductance for effective differential pumping. The length of the transfer optics is 30% shorter than the prior system, for reduced time-of-flight mass discrimination and increased ion transmission and trapping efficiency at the ICR cell. The ICR cell, elec. vacuum feedthroughs, and cabling were improved to reduce the detection circuit capacitance (and improve detection sensitivity) 2-fold. The design simplifies access to the ICR cell, and the modular vacuum flange accommodates new ICR cell technology including linearized excitation, high surface area detection, and tunable electrostatic trapping potential.
N. K. Kaiser, et al, A novel 9.4 tesla FTICR mass spectrometer with improved sensitivity, mass resolution, and mass range, Journal of the American Society for Mass Spectrometry 22,8 pp 1343-1351 (2011) Read online.
Last modified on 23 December 2022