Time of Flight ( TOF)Spectrometer ToF operates in a pulse mode Electron beam During a short pulse of E, ions are accelerated and acquire a constant AB kinetic energy kinetic energy mv2/2 >-0→0 but have different m/g and vs Thus they arrive to the detector in time sequence after travel the same distance. Time required to travel distance from the ion origin to the detector is p alse width cInsec 2qU amu kHz Schematic of TOF spectrometer with a spectrum The light ions with higher Vs arrive In order to provide higher resolution the pulse to the detector first should be as narrow as 1-10 ns. The pulse repetition frequency is usually in a kHz rangeTime of Flight (TOF) Spectrometer TOF operates in a pulse mode. pulse width In order to provide higher resolution the pulse should be as narrow as 1-10 ns. The pulse repetition frequency is usually in a kHz range. During a short pulse of E, ions are accelerated and acquire a constant kinetic energy: kinetic energy = mv2 /2 but have different m/q and Vs. Thus they arrive to the detector in time sequence after travel the same distance. Time required to travel distance l from the ion origin to the detector is: The light ions with higher Vs arrive to the detector first. Schematic of TOF spectrometer with a spectrum