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Giordanengo, S.

Paper Title Page
THPP122 Fast High-Power Power Supply for Scanning Magnets of CNAO Accelerator 3643
 
  • M. Incurvati
    OCEM spa, San Giorgio di Piano Bologna
  • F. Burini, M. F. Farioli, G. Taddia
    O. C.E. M. S.p. A., Bologna
  • I. De Cesaris, C. Sanelli, F. Voelker
    INFN/LNF, Frascati (Roma)
  • M. Donetti, S. Toncelli
    CNAO Foundation, Milan
  • S. Giordanengo, F. Marchetto
    INFN-Torino, Torino
  • G. Venchi
    University of Pavia, Pavia
  
  The paper presents the design aspects and performance measurements of the CNAO Scanning Magnets’ power supply (PS) rated ±550A/±660V and developed in collaboration between OCEM SpA and INFN-CNAO. CNAO is a medical synchrotron producing carbon ions and protons for the cure of deep tumours. The Scanning Magnets are dipole magnets used to move the beam in an x-y plane at the very end of the beam extraction line. The PS current will be set in order to cover the targeted tumour area. To accomplish such a task the specifications of the PS are very stringent: current ramp speed is required to be as fast as 100 kA/s with an overall precision class of 100 ppm. Moreover the wide (20x20 cm2) area to be covered by the beam requires a wide current range. High voltage peaks are required during transients whereas low voltage is needed during steady state. The above characteristics are challenging design issues both with respect to topology and control optimization.