Muon colliders

Abstract. Muon Colliders have unique technical and physics advantages and disadvantageswhen compared with both hadron and electron machines. They should thus be regarded as complementary. Parameters are given of 4 TeV and 0.5 TeV high luminosity p+p – coHiders, and of a 0.5 TeV lower luminosity demonstration machine. We discuss the various systems in such muon colliders, starting from the proton accelerator needed to generate the muons and proceed-ing through muon coohng, acceleration and storage in a co~der ring. Problems of detector background are also discussed