Construction and test of a synchrotron dipole model using Nb3Sn cable

A short dipole magnet for accelerator has been built using Nb3Sn cable with the "wind and react" technique. The magnet has a two shell coil configuration similar to the "Doubler" dipole and the designed central field is 6 teslas. Details of the construction are given along with test results. Due to the high current density in the copper the protection of the dipole requires a sophisticated protection system which makes use of a fast superconducting switch associated with a secondary copper dipole for the extraction of part of the magnetic energy.