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Pretelli, M.P.C.

Paper Title Page
WEPLS124 Diamond Booster Magnet Power Converters 2664
 
  • J.A. Dobbing, C.A. Abraham, R.J. Rushton
    Diamond, Oxfordshire
  • F. Cagnolati, M.P.C. Pretelli, L. Sita
    O.C.E.M. S.p.A., Bologna
  • G. Facchini
    CERN, Geneva
  • C. Rossi
    CASY, Bologna
 
  This paper will describe the design, factory tests, commissioning and early operation of the Diamond Booster Power Converters. The Power Converters covered are the Dipole, Quadrupole with two outputs, two bi-polar Sextupoles and 44 Steerers. The actual achieved performance will be compared with the specification and the extensive modelling that was carried out during the design phase. The design includes measures to enhance the reliability of the power converters, such as redundancy, plug-in modularity, component de-rating and component standardisation. All the Diamond power converters use the same digital controller, manufactured under licence from the Paul Scherrer Institute.  
WEPLS125 Diamond Storage Ring Magnet Power Converters 2667
 
  • R.J. Rushton, C.A. Abraham, J.A. Dobbing
    Diamond, Oxfordshire
  • F. Cagnolati, G. Facchini, M.P.C. Pretelli, V.R. Rossi, L. Sita
    O.C.E.M. S.p.A., Bologna
  • C. Rossi
    CASY, Bologna
 
  The DC Magnet Power Converter requirements for the Storage Ring of the Diamond Project are described together with performance, commissioning and initial operating experience. In addition to meeting the required performance, emphasis during the design phase was placed on reliability and minimising the mean time to repair a power converter. A modular design, built-in redundancy, EMC filtering and testing, component de-rating and standardisation have all been adopted. The power modules for the 200A supplies were subject to highly accelerated stress screening. All converters are switched mode with full digital control and a common control interface. Every power converter appears identical to the Controls Network, from the lowest power corrector up to the 800 kW Storage Ring Dipole Converter.  
WEPLS126 CNAO Resonance Sextupole Magnet Power Converters 2670
 
  • M.F. Farioli, F. Burini, S. Carrozza, M. Cavazza, S. Minisgallo, M.P.C. Pretelli, G. Taddia
    O.C.E.M. S.p.A., Bologna
  • D. Bagnara, M. Spera, A. Tilli, M. Toniato
    CASY, Bologna
  • I. De Cesaris
    CNAO Foundation, Milan
  • M. Incurvati, C. Sanelli
    INFN/LNF, Frascati (Roma)
 
  The CNAO Resonance Sextupole Magnet Power Converter requirements for the Storage Ring of the CNAO Project are described together with performance and initial operating experience. In particular the achieved performances will be compared with the specification and the extensive modelling that was done during the design phase. Not only the tight required performances were emphasized during the design phase but also particular attention was put on reliability and minimization of the repairing time (MTTR). Some fundamental criteria, like component de-rating and standardisation, have also been taken into account during the component choice phase. All converters adopt the switching technology with full digital control and a common control interface, that, as for the other CNAO power converters, uses the same digital controller, under licence from the Diamond Light Source.  
WEPLS127 CNAO Storage Ring Dipole Magnet Power Converter 3000A / ±1600V 2673
 
  • M.P.C. Pretelli, F. Burini, S. Carrozza, M. Cavazza, M.F. Farioli, S. Minisgallo, G. Taddia
    O.C.E.M. S.p.A., Bologna
  • I. De Cesaris
    CNAO Foundation, Milan
  • M. Incurvati, C. Sanelli
    INFN/LNF, Frascati (Roma)
  • F. Ronchi, C. Rossi, M. Spera, M. Toniato
    CASY, Bologna
 
  This paper will describe the design and simulations of the CNAO Dipole Power Converter rated 3000A / ±1600V. The Power Converter will feed the 16+1 synchrotron bending dipole magnets of the CNAO Storage Ring. The actual design confirms how the choice of a 24-pulses, 4 bridges series-parallel connected, active filter, bipolar voltage, meets the stringent requested technical specification ( 10-5 of maximum current for the output current residual ripple and setting resolution). The extensive modelling will also be presented. The design includes the strength of the topology design, component de-rating and component standardisation. As the other CNAO power converters, the Storage Ring Dipole Power Converter uses the same digital controller, under licence from the Diamond Light Source.  
WEPLS128 The Italian Hadrontherapy Center (CNAO): A Review of the Power Supply System for Conventional Magnets 2676
 
  • M. Incurvati, C. Sanelli
    INFN/LNF, Frascati (Roma)
  • L. Balbo, N. Balbo, A. Tescari
    EEI, Vicenza
  • F. Burini, S. Carrozza, M. Cavazza, M.F. Farioli, S. Minisgallo, M.P.C. Pretelli, G. Taddia
    O.C.E.M. S.p.A., Bologna
  • I. De Cesaris
    CNAO Foundation, Milan
 
  A hadron (Carbon/Proton) medical centre based on a synchrotron accelerator dedicated to the cure of deep tumours is under construction in Pavia (Italy) under the joint responsibility of CNAO (Centro Nazionale di Adroterapia Oncologica) and INFN (Istituto Nazionale di Fisica Nucleare). This paper describes the power supply system, made up of about 200 units designed by LNF, and whose converters for the synchrotron ring and related low, medium and high energy transfer lines are now under construction by the major Italian companies. The power supplies requirements and electrical characteristics will be reported describing the most interesting topologies that fulfill the requested performances together with the main features of each power supply topology. Synchrotron dipoles, quadrupoles, sextupoles and resonance sextupole power supplies have tight characteristics with respect to precision class (current resolution, residual ripple, short-long term stability, etc.) that range from 5 ppm to 500 ppm, fast dynamical response with bandwidth up to some hundreds hertz, high power from tens of kW to many MW and output current ranging from hundreds of A to 3 kA.