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
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