The Status of Optics Design and Beam Dynamics Study in J-PARC RCS

The 3GeV RCS at J-PARC is designed to provide the 3GeV proton beam and a goal of output beam power is 1MW. The beam commissioning starts on May 2007. At present more qualitative studies concerning beam dynamics are in progress: core beam handlings, halo beam handlings, instabilities and so on. In this paper the RCS optics design and the present status of beam dynamics studies are summarized.