Cold Powering Tests and Protection Studies of the FRESCA2 100 mm Bore Nb3Sn Block-Coil Magnet

The Nb3Sn block-coil dipole magnet FRESCA2 was developed within the framework of a collaboration between CEA Saclay and CERN, follow up of the European project EuCARD. The magnet is aimed at upgrading the cable test facility at CERN to a bore field of 13 T at 10.6 kA in an aperture of 100 mm as deliverable. The design features four 1.6-m-long double-layer coils wound with a 40 strand, 21-mm-wide Rutherford cable. The first assembly was limited at 12.2 T with a known production defect of the cable close to a splice in one of the coils. Following replacement of this coil, the second assembly reached the target for this run of 13.3 T. In this paper, the performance of the assemblies in terms of training behavior, quench detection, protection, magnetic measurements, and other cold powering tests will be discussed.