Common Coil Dipoles for Future High Energy Colliders

This paper presents several magnetic designs for a 16-T 50-mm aperture Nb3Sn dipole based on the common coil design for a future circular collider. It has an aperture-to-aperture spacing of 250 mm, a yoke outer diameter of 700 mm, and uses a similar or less conductor amounts than cosine theta or block designs. All field harmonics are about an order of magnitude better than specified at the design ...