On the Design of AVF Cyclotrons above 100 MeV

Certain problems associated with cyclotrons in the energy range above 200 MeV are discussed and possible solutions suggested. These concern: Producing the flutter and profile changes required for the acceleration of a wide range of particles and energies, the proportion between the RF wave length and the exit radius, phase acceptance, phase slip at extraction, extraction electrical field, turn separation and tolerances on the power supplies Computer applications in this energy range are also discussed.