Differential non-destructive image current detection in a Fourier transform quadrupole ion trap

Dual-detector differential non-destructive Fourier transform detection in a quadrupole ion trap is shown to improve signal intensity and reduce noise compared with spectra recorded using a single detector. A larger area detec tor in each end-cap electrode is machined to fit its hyperbolic shape and s o minimize field imperfections on the z-axis, Argon, acetophenone and bromo benzene spectra were recorded to allow a comparison between single- and dua l-detector (differential) modes of detection and to demonstrate the improve ment achieved with differential detection, Copyright (C) 1999 John Wiley & Sons, Ltd.