Author: Yokouchi, S.
Paper Title Page
MOPPD030 Present Status of RIKEN Ring Cyclotron 433
  • Y. Watanabe, M. Fujimaki, N. Fukunishi, H. Hasebe, Y. Higurashi, E. Ikezawa, H. Imao, T. Kageyama, O. Kamigaito, M. Kase, M. Kidera, M. Komiyama, H. Kuboki, K. Kumagai, T. Maie, M. Nagase, T. Nakagawa, J. Ohnishi, H. Okuno, N. Sakamoto, K. Suda, H. Watanabe, T. Watanabe, K. Yamada, S. Yokouchi
    RIKEN Nishina Center, Wako, Japan
  • T. Aihara, S. Fukuzawa, M. Hamanaka, S. Ishikawa, K. Kobayashi, Y. Kotaka, R. Koyama, T. Nakamura, M. Nishida, M. Nishimura, T.O. Ohki, K. Oyamada, J. Shibata, M. Tamura, N. Tsukiori, A. Uchiyama, K. Yadomi, H. Yamauchi
    SHI Accelerator Service Ltd., Tokyo, Japan
  The RIKEN Ring Cyclotron (RRC K540) has been in stable operation over twenty-five years, and supplying many kinds of heavy-ion beams to experiments. Since 2007, it has also been supplying beams to the RIBF four Ring cyclotrons including the Super-conducting Ring Cyclotron (SRC K2500). Now the RRC has three kinds of injectors, one is K70 AVF cyclotron for light ions, the second is the variable-frequency linac for heavy ions, and the third is the RILAC2 for using the high intensity very heavy ions like U and Xe. The many combinations of accelerators are possible, and in any acceleration modes, the RRC should works as a first energy booster. A total operation time of the RRC is more than 5000 hr in every year. The present status of the RRC operation will be reported.  
THPPP084 Charge Stripping of Uranium-238 Ion Beam with Helium Gas Stripper 3930
  • H. Imao
    RIKEN Nishina Center for Accelerator-Based Science, Wako, Saitama, Japan
  • N. Fukunishi, H. Hasebe, O. Kamigaito, M. Kase, H. Kuboki, H. Okuno, T. Watanabe, Y. Watanabe, Y. Yano, S. Yokouchi
    RIKEN Nishina Center, Wako, Japan
  Development of the reliable and efficient electric charge stripping method is one of the key issues in next-generation high-intensity heavy ion accelerators. Although conventional carbon-foil charge strippers provide a good charge stripping efficiency, two serious problems are emerging; the short usable time and thickness non-uniformity. A charge stripper using low-Z gas is an important candidate applicable for high-intensity 238U beams to replace carbon foil strippers. In the present work, the first actual charge stripping system using helium gas for 238U beams injected at 10.75 MeV/u has been developed and tested.