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- Y. Iwata, T. Furukawa, Y. Hara, K. Mizushima, T.M. Murakami, K. Noda, S. Sato, T. Shirai, K. Shoda, S.S. Suzuki
NIRS, Chiba-shi, Japan
- N. Amemiya
Kyoto University, Kyoto, Japan
- H. Arai, T. Fujimoto
AEC, Chiba, Japan
- T.F. Fujita
National Institute of Radiological Sciences, Chiba, Japan
- Y. Nagamoto, T. Orikasa, S. Takayama, T. Yazawa
Toshiba, Tokyo, Japan
- T. Obana
NIFS, Gifu, Japan
- T. Ogitsu
KEK, Ibaraki, Japan
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New developments at HIMAC include a superconducting carbon gantry, a new therapy area with three new treatment rooms, and substantial enhancements to the synchrotron extraction system to enable energy-variation within a synchrotron cycle to match characteristics of the gantry and three-dimensional raster scanning. This carbon gantry equips ten combined-function superconducting magnets, allowing us to design the compact gantry; the length and the radius of the gantry will be approximately 13 and 5.5 m, respectively, which are comparable to those for the existing proton gantries. Further, these superconducting magnets were designed to provide the fast slew rate of the magnetic field for the energy-variation operation of the synchrotron. The fabrication of the superconducting magnets has been made, and field measurements of the several magnets were performed. In this talk, the design of the superconducting gantry including the magnet design and results of the field measurements will be presented.
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