The Status of Muon Accelerator R{\&}D for Future High Energy Colliders

Muon accelerators offer unique potential for high energy physics applications. Muon storage rings can provide intense, pure, and precisely measured neutrino beams for neutrino oscillation studies. TeV-class muon beams offer a potential route to an energy frontier collider operating at several TeV with luminosities approaching 10$^{\mathrm{35~}}$cm$^{\mathrm{{\-}2~}}$s$^{\mathrm{{\-}1}}$. The ability to accelerate muons with multi-pass acceleration systems offers significant benefits for the energy efficiency of a collider utilizing these beams. Interest in continued R{\&}D on these machines has recently re-kindled and current studies of the potential physics performance of a detector operating at such a collider appear very promising. An overview of the status of key feasibility R{\&}D for such a collider, based on a proton-driver source, is presented.