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Shimojyu, T.

Paper Title Page
WEPCH168 Development toward Turn-key Beam Delivery for Therapeutic Operation at HIMAC 2325
 
  • T. Furukawa, T. Kanai, K. Noda, S. Sato, E. Takada, M. Torikoshi, S. Yamada
    NIRS, Chiba-shi
  • M. Katsumata, T. Shimojyu, T. Shiraishi
    AEC, Chiba
 
  Since 1994, more than 2500 cancer patients have been treated by carbon ion beam at HIMAC. To increase the number of patients per day, we have studied the reproducibility of the beam quality, such as the position, profile and intensity, during the operation. For this purpose, the accelerator needs high reproducibility to minimize the beam tuning time with more flexible scheme. Further, the irradiation system and the accelerator need to ensure dose uniformity. As a result of this study, it was found that a slight change of the magnetic field in the transport line would not affect the beam quality. However, a slight change of the horizontal tune strongly affects the beam quality because of a resonant slow-extraction. In this paper, we report about our investigation and present result of the development.