Manufacturing of RIKEN intermediate-stage ring cyclotron (IRC)

摘要

The 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 in the RI beam factory. The multi-stage accelerator system consists of three ring cyclotrons of a K520-MeV fixed frequency ring cyclotron (IRC), 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. The whole 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 has been completed and validated by some tests at Niihama works. Following items are described in this report. 1) Structure and components of the IRC 2) Structure, specification and magnetic field measurement of the sector magnet 3) Structure, specification and low-power test of the acceleration resonator