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- K. Yamada, M. K. Fujimaki, N. Fukunishi, A. Goto, H. Hasebe, K. Ikegami, O. Kamigaito, M. Kase, K. Kumagai, T. Maie, M. Nagase, J. Ohnishi, N. S. Sakamoto, Y. Yano, S. Yokouchi
RIKEN, Wako, Saitama
- H. Okuno
RIKEN/RARF/CC, Saitama
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A superconducting ring cyclotron (SRC) was successfully commissioned to work as the final energy booster of the RI beam factory (RIBF) in RIKEN. SRC is the world's first ring cyclotron that uses superconducting magnets, and has the strongest beam bending force among the cyclotrons. It can boost the ion beam energy up to 440 MeV/nucleon for light ions and 350 MeV/nucleon for very heavy ions such as uranium nuclei to produce intense radioactive beams. The ring cyclotron consists of 6 major superconducting sector magnets with a maximum field of 3.8T. The total stored energy is 240MJ, and its overall sizes are 19 m diameter, 8 m height and 8,100 tons. The magnet system assembly was completed in August 2005, and successfully reached the maximum field in November 2005. After magnetic field measurements for two months, the other hardware than the superconducting magnets was installed. The first beam was extracted from SRC on 12/28/2006. From May 2007 we started to supply uranium beams to nuclear scientist to produce RI beams. This talk will describe the milestones that were achieved during the commissioning as well as some of the issues that still need to be resolved.
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