An ion trap/multi-turn time-of-flight (ToF) mass spectrometer with potential-lift has been developed. This system consists of an external ion source, a lens system, an ion trap, a potential-lift, a multi-turn ToF mass spectrometer and a detector. The ion trap consists of hyperbolic electrode cross-sections (Paul trap) and is used as an ion storage device. The potential-lift, which is part of the flight tube, was attached between the ion trap and the multi-turn ToF mass spectrometer. The potential-lift is known to be useful for increasing the kinetic energy of the ions. In order to check the ability of the potential-lift, mass distributions of [(CsI)n Cs]+ clusters (n = 1–9) were measured. The relative intensity ratios of the [(CsI)nCs]+ clusters were consistent with the results obtained using other apparatus. To check the properties of the new apparatus, Xe+ isotopes were analyzed using either a linear or multi-turn ToF mass spectrometer. In the linear mode, the mass resolution was 500. In the multi-turn mode, the resolution depended on the number of cycles of the multi-turn ToF mass spectrometer; the mass resolution was 4400 (FWHM) after nine cycles. This new apparatus with a high resolution will be useful for measurements of ion–molecule reactions and photodissociations.
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