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Abstract
| A 5.4-T REBCO insert dipole magnet is being built at CEA Saclay to study the viability of hybrid accelerator magnets made of high- and low-temperature superconductors to generate magnetic fields in the range of 20 T, which is a field level of interest for future circular colliders. In this paper, we present the electromechanical design of the insert. It is a mechanically more robust version of the baseline design, which was produced in the framework of the former EuCARD program. The fabrication of a prototype made with dummy coils is discussed, and the impact of persistent currents on the central magnetic field is estimated using a 2-D electromagnetic model |