A TOF mass spectrometer with higher resolution and sensitivity via elimination of chromatic TOF aberrations of higher orders

摘要

The expressions describing the time-of-flight (TOF) and conditions of TOF focusing of ion packets by energies in the ion source with two accelerating gaps have been obtained. The first gap is the ionization region with a uniform electrostatic field, whereas the second gap is the immersion objective with a non-uniform electrostatic field, where the role of the "cathode" (emitting surface) is played by the exit window of the ionization region.