The superconducting magnetic system for the spectrometer SPHERE of relativistic nuclei

Abstract The superconducting magnetic system for the spectrometer SPHERE has been built and tested. The spectrometer was mounted on the beams of relativistic nuclei extracted out of the Synchrophasotron and the superconducting accelerator Nuclotron which was put into operation at JINR, Dubna. The inner warm bore of the cryostat is 0.72 m, the length 0.35 m and the central magnetic field 2.64 T for a current of 1.2 kA. The magnet winding is fabricated from copper stabilized Nb Ti superconductor with epoxy resin. The magnet winding has a forced indirect cooling. The original thermoconducting strips, current leads, some other elements of magnet construction and electrical protection are described. The results of testing the magnet are presented.