Design Study of Main Dipole Magnets for Korea Heavy Ion Medical Accelerator Synchrotron

The Korea Institute of Radiological and Medical Science launched a project to construct an accelerator facility for carbon ion therapy, known as the Korea Heavy Ion Medical Accelerator (KHIMA), in April 2011. The development of the synchrotron for this facility began in 2014, and its main dipole magnets are currently in the design phase. In the study described herein, a simulation model of a main dipole magnet was created based on the Proton-Ion Medical Machine Study, and the basic parameters of the dipole magnets and their magnetic field requirements were investigated. The coil specifications were considered, and the pole profile was optimized to achieve the necessary magnetic field quality. Furthermore, the dynamic behavior of the modeled magnet was studied to estimate the effects of the eddy current and the driving voltage. The results of this design study are presented in this paper.