An improved electrostatic ion trap mass spectrometer based on two reflectrons
and Fourier Transform analysis is disclosed. An ensemble of ions with a kinetic
energy falling into a certain range will do isochronous oscillations in this reflectron
trap. The image charge transient of those oscillations is processed with a data
acquisition system similar to those used in FT-MS to get a mass spectrum. Various
application-specific ion extractors, ion storage prior to extraction, MS/MS techniques
and MSn techniques are also disclosed.
