# Is there a mass spectrometer software that can measure the mass of a proton

I spent a lot of hours looking for mass spectrometer software (or Cathode-ray simulator) that can measure the mass of a proton or any sub atomic particle. Until now I only found software that work on isotopes, organic mixtures and other compounds.

For my school project, I need a computer simulation to measure the mass of a proton (I chose the idea not my school) so any other way of measuring a proton will not be useful to me.

• As a practical matter, running hydrogen through most chemical mass spectrometers can measure of the proton mass, though you need to insure that the ionization step is energetic enough to get a significant number of molecules dissociated (you need to measure $\mathrm{H}^+$ and not $(\mathrm{H}_2)^+$). – dmckee Dec 28 '18 at 15:10