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Leray, M. J.

Paper Title Page
TUPP111 Magnetic Design Improvement and Construction of the Large 90o Bending Magnet of the Vertical Beam Delivery Line of CNAO 1782
 
  • W. Beeckman, S. Antoine, F. Forest, J. L. Lancelot, M. J. Leray, T. Planche
    Sigmaphi, Vannes
  • P. Fabbricatore
    INFN Genova, Genova
  • C. Priano, M. Pullia
    CNAO Foundation, Milan
 
  The CNAO (Centro Nazionale di Adroterapia Oncologica) is the medical center dedicated to the cancer therapy, under construction in Italy. Protons with energy ranging from 60 to 250 MeV and carbon ions with energy 120 to 400 MeV/u will be delivered to patients in three different treatment rooms, of which one is served with both horizontal and vertical beams. The vertical line requires a 70 tons 90o bending magnet providing 1.81 T in a good field region of x = ± 100 by y = ± 100 mm2 with an integrated field quality (ΔBL/BL) at all field levels ≤ ± 2×10-4. Starting from the experience matured when constructing the large bending magnet for HICAT gantry, we have developed a design able to meet these more stringent requirements in both 2D and 3D and special attention was paid to the study of manufacturing tolerances