So, i'm beggining to work in a cylcotron as operator. Most of the crew here has technical education, albeit not quite a physics degree. When i asked what's the distribution of energies of the particles when they hit the target i got a blank look. How could i determine this? I'm guessing that since the energy is a function of the trajectory radius, then i could estimate it by measuring the size of the reversing ion foil? Annex: The cyclotron operates by accelerating negative H ions, which at the end of their trip they hit a carbon foil which strips the two electrons away leaving a proton which starts spinning the other way hitting the target.