Magnet Layout decision and engineering design report of the curved CCT dipole magnet demonstrator

The Heavy Ion Therapy Research Integration plus (HITRIplus) European H2020 project aims at bringing together, integrating on European scale, and opening up to European researchers from academia and industry, the key research infrastructures for bio-physics and medical research on cancer treatment with heavy ion beams, jointly developing at the same time the next generation of its sophisticated instruments. One of the major goals is to work out a reference design for a superconducting synchrotron with a footprint of about 8×8 m, and develop the prototypes of its key components. This report is the summary of the results of Task 8.3, "Preliminary Engineering Design for Accelerator and Gantry magnets", presenting the functional specifications of the bending magnets, the developments, considerations and tests carried out, and the mechanical design of the prototype