• Y. Ishi, M. Inoue, Y. Kuriyama, J.-B. Lagrange, Y. Mori, T. Planche, M. Takashima, T. Uesugi, E. Yamakawa
  KURRI, Osaka
• H. Imazu, K. Okabe, I. Sakai, Y. Takahoko
  University of Fukui, Faculty of Engineering, Fukui

World's first ADSR experiments which use spallation neutrons produced by high energy proton beams accelerated by the FFAG synchrotron has started since March 2009 at KURRI. In these experiments, the prompt and delayed neutrons which indicate neutron multiplication caused by external source have been detected. The accelerator complex for ADSR study in KURRI consists of three FFAG proton rings. It delivers the 100MeV proton beam to the W target located in front of the subcritical nuclear fuel system constructed in the reactor core of KUCA (Kyoto University Critical Assembly) at 30Hz repetition rate. Current status of the facility and the future plans of ADSR system and high intensity pulsed spallation neutron source which employ a newly added 700MeV FFAG synchrotron to the existing FFAG complex in KURRI will be presented.

Slides

• K. Okabe, R. Nakano, Y. Niwa, I. Sakai
  University of Fukui, Faculty of Engineering, Fukui
• Y. Arakida
  KEK, Ibaraki
• M. Inoue, Y. Ishi, Y. Kuriyama, J.-B. Lagrange, Y. Mori, T. Planche, T. Uesugi, E. Yamakawa
  KURRI, Osaka

In Kyoto University Research Reactor Institute (KURRI), the FFAG accelerator for accelerator driven sub-critical reactor (ADSR) system has been constructed and world's first ADSR experiments have started in March 2009. In order to upgrade beam intensity, multiturn charge exchange injection system for scaling FFAG accelerator is being studied. The 11MeV H^- beam is injected from linac and is accelerated up to 100MeV in FFAG main ring. In this presentation, the detail of injection system is described and feasibility of such a low energy H^- injection system is discussed.