DESIGN AND STUDY OF A SUPERFERRIC MODEL DIPOLE AND QUADRUPOLE MAGNETS FOR THE GSI FAST-PULSED SYNCHROTRON SIS

New experimental results from the investigation of a model superferric Nuclotron-type dipole and quadrupole magnets are presented. The magnets operate at pulse repetition rate f = 1 Hz, providing the peak magnetic field B = 2 T and the field gradient G = 34 T/m in the dipoles and quadrupoles respectively. The superconducting coil is made from a hollow multi-filamentary NbTi cable cooled with two phase helium flow. Different possibilities were investigated to reduce AC power losses in the case of a cold iron yoke (T = 4.5 K). The achieved results are discussed. The value of 9 W/m has been obtained for dipole magnet with the yoke at T = 50 K. The first 50 K yoke quadrupole was designed and tested.