Author: Fujimoto, T.
Paper Title Page
WEPRO087 Magnetic-field Measurements of Superconducting Magnets for a Heavy-ion Rotating-gantry and Beam-tracking Simulations 2159
 
  • S.S. Suzuki, T. Furukawa, Y. Hara, Y. Iwata, K. Mizushima, S. Mori, K. Noda, T. Shirai, K. Shoda
    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
 
  Manufacture of superconducting rotating-gantry for heavy-ion radiotherapy is currently in progress. This rotating gantry can transport heavy ions having 430 MeV/nucleon to an isocenter with irradiation angles of over 0-360 degrees, and enable advanced radiation-therapy. The three-dimensional scanning-irradiation method is performed in this rotating gantry. Therefore, uniformity of magnetic field is quite important since scanned beams traverse through these superconducting magnets before reaching to the isocenter. In the present work, we precisely measured the magnetic-field distributions of the superconducting magnets for the rotating gantry. We used Hall probes to measure the magnetic field. The magnetic-field distributions were determined by measuring Hall voltage, while moving the Hall probes on a rail, which has the same curvature as a center trajectory of beams. The measured-field distributions were compared with calculated distributions with a three-dimensional electromagnetic-field solver, the OPERA-3D code. Furthermore, beam-tracking simulations were performed by using the measured magnetic-field distributions to verify the design of the superconducting magnets.  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-WEPRO087  
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