The behavior of ions generated in a time-of-flight (
TOF) mass spectrometer has been studied using classical particle dynamics simulations. TOF spectra have been simulated in a condition of moderately high ion densities. The evolution of the distortion of the
TOF signal has been revealed as the ions travel through the
TOF tube. A bunching effect similar to e-beam in a storage ring was observed. The distortion of the signal was even more significant in the case of more than one ion species. The results will be useful to interpret
TOF spectra with complex compositions. Keywords: ions,
TOF spectra, space charge effect
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