Riken RI-beam factory project

The RIKEN Accelerator Research Facility (RARF) has proposed the "RI-Beam Factory" project. In 1997 fiscal year, the construction budget for the first phase of this project has been formally approved. The factory is aimed at providing the world´s most intense RI (radioisotope) beams at energies of several hundreds MeV/nucleon over the whole range of atomic masses. RI beams will be generated by projectile fragmentation. For the efficient generation a cascade of a K930-MeV ring cyclotron and a K2500-MeV superconducting ring cyclotron will boost the energy of heavy-ion beams from the existing ring cyclotron up to 400 MeV/nucleon for light ions and more than 100 MeV/nucleon for very heavy ions. Moreover, this factory includes a next generation of the multi-use experimental storage rings (MUSES) consisting of an accumulator-cooler ring, a booster synchrotron ring and double storage rings. The MUSES will enable us to conduct various types of unique colliding experiments.