Status Report on the Nirs-Chiba Isochronous Cyclotron Facility

A variable energy isochronous cyclotron has been installed for biomedical studies. Since the fall of 1975, the cyclotron has been used for the clinical trial of fast neutron therapy and the production of short-lived radionuclides. To improve the beam stability, a beam-phase stabilizer has been developed. Recently, a heavy ion source of self heated cathode PIG type has been developed and several kinds of ions have been successfully accelerated. The facility and some experiences in the application are also described.