An RI beam factory is under construction at RIKEN. A new multi-stage accelerator system and a new multi-use experimental storage ring will be built at the RI beam factory. The multi-stage accelerator system consists of three ring cyclotrons: a K520-MeV fixed frequency ring cyclotron (fRC), a K980-MeV intermediate-stage ring cyclotron (IRC), and a K2500-MeV superconducting ring cyclotron (SRC). It will boost the heavy-ion beam supplied by the existing K540-MeV ring cyclotron (RRC) in energy up to 350 MeV/ nucleon. All the components of the IRC, the acceleration resonators of the SRC and some components of the beam transport system have been manufactured by SHI. In the spring of 2001, the IRC was completed and validated by tests at the Niihama works. The following items are described in this report.
1) Structure and components of the IRC
2) Structure, specifications and magnetic field measurements of the sector magnet
3) Structure, specifications and low-power testing of the acceleration resonator