MONTE CARLO SIMULATION OF THE TOTAL DOSE DISTRIBUTION AROUND THE 12 MEV UPC RACE-TRACK MICROTRON AND RADIATION SHIELDING CALCULATIONS

The Technical University of Catalonia is building a miniature 12 MeV electron race-track microtron for medical applications. In the paper we study the leakage radiation caused by beam losses inside the accelerator head, as well as the bremsstrahlung radiation produced by the primary beam in the commissioning setting. Results of Monte Carlo simulations using the PENELOPE code are presented and two shielding schemes, global and local, are studied. The obtained shielding parameters are compared with estimates based on DIN 6847 part 2 as international recommendation of the radiation safety standards.