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.