Speaker
Description
The High Field Magnet (HFM) R&D program at CERN aims to find technological solutions for the construction of accelerator magnets to be installed in future post-LHC colliders. The Italian Institute of Nuclear Physics (INFN) and CERN are collaborating to design and fabricate a new four-layer cos-theta dipole able to achieve a bore field of 14 T with at least 20% of margin on the loadline. The magnet will be fabricated as a short model to demonstrate the feasibility of the technology, but the engineering solutions are thought to be adopted to a longer version as well, in view of the production of a full prototype ready to be installed in an accelerator. Two design options are under evaluation: a four-layer dipole entirely made of Nb₃Sn, and a hybrid configuration combining inner Nb₃Sn layers with outer NbTi layers. Both options are being assessed for feasibility as short models, with scalable design choices for longer magnet prototypes suitable for accelerator integration. This paper presents a comparative study of the electromagnetic performance of the two design options. The results provide insights into the trade-offs between performance, complexity, and protection constraints in the development of next-generation high-field dipole magnets. The full Nb3Sn solution allows to achieve a higher bore field, but the hybrid solution is a promising, cost-effective alternative to propose for next-generation colliders.
