A Plan of Synchrotron Light Source for Medical Applications at Nirs

We are designing a synchrotron light source dedicated to medical applications including an intravenous coronary angiography for practical uses at a hospital. The synchrotron light source system is required to be compact for installation in a limited space of the hospital. The system is also required to be operated easily as medical diagnostic devices. For the energy subtraction coronary angiography, required design parameters of a storage ring are circumference of about 45 m, 1.8 GeV electron energy and a stored beam currents of 400 mA. A multipole wiggler with superconducting coils is considered to be one of key devices to realize a required high photon intensity. A microtron with higher energy than that of commercially obtainable ones could be a good candidate of an injector for downsizing the whole system. Two optional beam lines are planned to be used for clinical diagnoses, and other beam lines of bending magnets are prepared for biology, physics, and other experiments to support the clinical diagnoses. We report the design of the compact system for the medical uses.