Accomplishments of the Heavy Electron Particle Accelerator Program

The Muon Accelerator Program (MAP) has completed a four-year study on the feasibility of muon colliders and on using stored muon beams for neutrinos. That study was broadly successful in its goals, establishing the feasibility of heavy lepton colliders (HLCs) from the 125 GeV Higgs Factory to more than 10 TeV, as well as exploring using a {\mu} storage ring (MSR) for neutrinos, and establishing that MSRs could provide factory-level intensities of $\nu_e (\bar{\nu}_e)$ and $\bar{\nu}_\mu$ $({\nu}_\mu)$ beams. The key components of the collider and neutrino factory systems were identified. Feasible designs and detailed simulations of all of these components have been obtained, including some initial hardware component tests, setting the stage for future implementation where resources are available and the precise physics goals become apparent.