The magnetic field in a cyclotron used in proton beam cancer therapy is 0.420 T. The dees have radius 91.8 cm. What maximum speed can a proton achieve in this cyclotron? The mass of a proton is 1.673 x 10 27 kg. m/'s Required information In one type of mass spectrometer, ions having the same velocity move through a uniform magnetic field. The spectrometer is being used to distinguish 12c* and 14C* ions. The 120* ions move in a circle of diameter 40.9 cm Use these atomic mass values: 12c. 1204: 14c. 14.0 u. What is the diameter of the orbit of HC" ions? tint