INSERT MODEL COIL WOUND BY AL2O3-CU STRENGTHENED NB3SN WIRE

With the aim of fabricating large-bore, high-magnetic-held magnets wit h low coil weight and volume, an alumina-Cu reinforced Nb3Sn wire of 1 km in length has been developed by improving the workability of the t ube process. Two kind of insert model coils were made using the develo ped wire and the conventional Cu-matrix wire, The maximum quench curre nt observed was 126 A in a backup field of 11 T, which corresponds to an electromagnetic force of 244 MPa, The coil strain for the reinforce d coil was always smaller than that for the Cu-matrix coil.