Speaker
Description
A Muon Collider is one of the most promising options for the post-LHC era, offering leptonic precision without the limitations of synchrotron radiation that affect electron machines. Its feasibility, however, is strongly constrained by the short muon lifetime (2.2 μs), which demands extremely rapid production, acceleration, cooling, and collision—posing severe technological challenges.
Among these, magnet design is one of the most critical. The collider requires very high magnetic fields and large apertures to host the shielding needed against the intense radiation from muon decay, while also meeting sustainability and efficiency goals. High-temperature superconductors, especially ReBCO, are the only realistic materials for achieving such performance, though their technological maturity still requires significant R&D and improved modelling.
This contribution presents the status of the preliminary magnet design, focusing on mechanical and electromagnetic aspects, and how these are modeled. In the first stage of magnet design, an analytical study was carried out to estimate the maximum achievable performance of dipoles, quadrupoles, and combined-function magnets as a function of peak field or gradient and aperture. Key constraints—such as allowable stress, protection feasibility, operating margin, and cost—were included in a simplified form.
Based on these results, a preliminary design of the ARC dipole (16 T, 140 mm bore) is now under way, exploring two parallel layouts—cos-theta and block-coil—to assess their respective strengths and limitations.
