Baseline Design of a 16 T $\cos \theta$ Bending Dipole for the Future Circular Collider

The EuroCirCol project is part of the Future Circular Collider (FCC) study under the European Union leadership in the framework of a H2020 project. In particular, the Italian Institute for Nuclear Physics, in collaboration with CERN and other European laboratories, is developing the design of a cos theta Nb3 Sn dipole magnet which will be part of the Conceptual Design Report of the FCC studies in 2019. The magnet, with an aperture diameter of 50 mm and a bore field of 16 T, will be able to bend the beams at final energies and within collider size constraints. Here we present an update of the electromagnetic design of the Nb3 Sn cos theta dipole in double-aperture configuration, the 2-D mechanical analysis, and also the 3-D coil-ends study.