Author: Minervini, J.V.
Paper Title Page
MOPPT020 Study of a Superconducting Compact Cyclotron for Delivering 20 MeV High Current Proton Beam 76
  • M.M. Maggiore
    INFN/LNL, Legnaro (PD), Italy
  • L. Bromberg, C.E. Miller, J.V. Minervini, A. Radovinsky
    MIT/PSFC, Cambridge, Massachusetts, USA
  Compact cyclotrons which accelerate high current of H ions in the range of 10-30MeV have been widely used over the last 25 years for medical isotope production and other applications. For a number of these, low weight, low power consumption, portability or low radiation background are key design requirements. We have evaluated the feasibility of a compact superconducting cyclotron that would provide proton beams up to 20 MeV by accelerating H ions and extracting them by the stripping process with current of 100uA. The study demonstrates that the survival of the H ion under high magnetic field environment could be large enough to guarantee low beam losses as long as the RF voltage is high. The compact cyclotron is energized by a set of superconducting coils providing the needed magnetic field, while the azimuthal varying field is done by four iron sectors. Additional superconducting coils are added to minimize the stray magnetic field, eliminating the need for a return yoke. The option of accelerating negative deuteron molecules has also been considered and is presented.