Cyclotrons for Radioactive Beams

This paper discusses the magnet design of a cyclotron to be used as a primary accelerator in a radioactive beam facility of the ISOL type. The assumed specifications are a proton energy of 600 MeV with 100 pA current It has a single stage, a normal conducting magnet coil and a 9.8 m outside yoke diameter. 8 sector and 4 sector designs are studied. The magnetic field was calculated with the 3D magnet code TOSCA, and orbit stability was checked with an equilibrium orbit code and phase plots. Some post-accelerator cyclotron options arc also discussed. 1