Conceptual Designs of Dipole Magnet for Muon Collider Storage Ring

Conceptual designs of a superconducting dipole magnet for a storage ring of a muon collider with a 1.5 TeV center of mass (c.o.m.) energy and an average luminosity of 10³⁴ cm^-2 s^-1 are presented. In contrast to proton machines, the dipoles for the muon collider should be able to handle ~0.5 kW/m of dynamic heat load from the muon beam decays. The magnets are based on Nb₃Sn superconductor and designed to provide an operating field of 10 T in the 20-mm aperture with the critical current margin required for reliable machine operation. The magnet cross-sections were optimized to achieve the best possible field quality in the aperture occupied by beams. The developed mechanical structures provide adequate coil prestress and support at the maximum level of Lorentz forces in the coil. Magnet parameters are reported and compared with the requirements.