Modification Studies for the Berkeley 184-In. Cyclotron

Studies are in progress on possible improvements of the center region and extraction system of the 184-in. cyclotron. The center region is being studied with a 28-in. model proton cyclotron, which has been operated without frequency modulation at 16 and 23 kG and at 1% duty cycle. Frequency modulation has now been added to study space charge and capture problems. Computer studies are also being done with an orbit code including electric field, to study median plane motion. The extraction system is being examined to reduce losses in the regenerator region.