Author: Yamauchi, H.
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.  
THPPP040 Heavy-ion Beam Acceleration at RIKEN for the Super-Heavy Element Search 3823
  • M. Kase, M. Fujimaki, Y. Higurashi, E. Ikezawa, O. Kamigaito, M. Komiyama, T. Nakagawa, K. Ozeki, N. Sakamoto, K. Suda
    RIKEN Nishina Center, Wako, Japan
  • T. Aihara, T.O. Ohki, K. Oyamada, M. Tamura, A. Uchiyama, H. Yamauchi
    SHI Accelerator Service Ltd., Tokyo, Japan
  In RIKEN Nishina accelerator center, the experiment on the super-heavy element (Z=113) search has been being carried out since 2003. The RIKEN heavy-ion linac is supplying a heavy-ion beam of 70Zn with energies around 5MeV/nucleon. The beam intensities are required more than 1 particle maicro amper on the target. Very long-term and stable operations are intrinsic for this kind of experiments. So far two events for Z=113 have been found during a net irradiation time of 10345 hours (431 days) with a total dose 1.1 x 1020 (12.8 mg). Heavy operation of the linac will be reported.  
THPPC050 Effects of Grids in Drift Tubes 3401
  • M. Okamura
    BNL, Upton, Long Island, New York, USA
  • H. Yamauchi
    Time Corporation, Hiroshima, Japan
  In 2011, we upgraded a 200 MHz buncher in the proton injector for the AGS – RHIC complex. In the buncher we installed four grids made of tungsten to improve a transit time factor of the buncher. The grid installed drift tubes have 32 mm of inner diameter and the each grid consists of four quadrants. The quadrants were cut out precisely from 1mm thick tungsten plates by a CNC wire cutting EDM. In the conference the 3D electric field design and performance of the grid will be discussed.
Work supported by Brookhaven Science Associates, LLC under Contract No. DE-AC02-98CH10886 with the U.S. Department of Energy.