DESIGN AND SETUP OF AN ION-TRAP REFLECTRON TIME-OF-FLIGHT MASS-SPECTROMETER

In this paper the design and first results of a new hybrid mass spectr ometer are presented. This instrument represents a combination of a qu adrupole ion trap with a reflectron-time-of-flight mass spectrometer ( ReTOF). As a result of this setup, ions can be stored in the three dim ensional quadrupole without any buffer gas for long periods. Unimolecu lar reactions in the gas phase are investigated with the instrument. T he ReTOF acts as a mass resolving device which provides the necessary mass resolution for the hybrid instrument. It also allows some further examination of the stored ions by photodissociation experiments in th e second order space focus plane of the ReTOF. Starting with theoretic al calculations and the development of the new instrument (TrapTOF) al l advantages, instrumental parameters and capabilities of the instrume nt are demonstrated.