MAGNETIC MODELING,MEASUREMENTS AND SORTING OF THE CNAO SYNCHROTRON DIPOLES AND QUADRUPOLES

The CNAO synchrotron physical performances derive from a set of medical specification; mainly from the dose delivery precision, beam size accuracy at the patient and beam position accuracy. To obtain the needed accuracy at the patient location also the synchrotron magnets have very strong requirements in term of integral homogeneity. These tolerances have been achieved not only with an accurate design but also with a strong follow up of the construction steps and an accurate campaign of magnetic measurements. As final step the position of each magnet in the ring was decided by taking into account the real performances of each magnet and simulating their effects on the beam.