DESIGN OF THE DIPOLE AND QUADRUPOLE MAGNETS OF THE PRAMES

The paper presents 2D-calculation results of magnetic elements of the PRAMES (Prague Medical Synchrotron). This machine is a dedicated accelerator for cancer therapy. The output energy of the beam should be variable in the range 60 220MeV. The maximum magnetic field of the dipole magnet should be 1.2T. The injection energy is equal to 12MeV. The focusing structure of the proton synchrotron consists of 8 dipole and 18 quadrupole magnets. All magnets are laminated to minimize addy currents. The dipoles parallel-edge, H- type magnets. The field uniformity should be of the order of 10 -4 in the working area ( 63 mm and 27 mm in the horizontal and vertical plane respectively). The maximum magnetic field on the pole of the quadrupole lenses should be less than 1T. The gradient uniformity of quadrupole magnets in the working region should be less than 3.5x10 -4 . This report is limited to the static regime and the time stability requirements are omitted.