Design Study of a Curved Dipole Superconducting Magnet for Beam Transport

As an efficient bending magnet for a beam line, a curved dipole superconducting magnet is proposed. The magnet consists of a curved saddle shape (cosine theta) superconducting coil with multilayer structure. The curved saddle shape has an influence on the field quality at each coil cross-section. Therefore the superconducting coil is designed to fulfill the design requirement that there be a linear relationship between the radius and the integral magnetic field along an arc path of the beam line, by using the developed coil design code. In this study, the conceptual design of the curved dipole superconducting magnet for a heavy ion beam of 400 MeV/u was carried out with respect to a magnetic field. In addition, a load line of the magnet and a maximum temperature of the coil after quench were calculated.