A practical high-energy high-luminosity μ+ - μ- collider

We present a candidate design for a high-energy high-luminosity μ+-μ collider, with Ecm = 4 TeV, L = 3 x 104cm-2s-1, using only existing technology. The design uses a rapid-cycling medium-energy proton synchrotron, which produces proton beam pulses which are focused onto two π-producing targets, with two π-decay transport lines producing μ+'s. The μ's are collected, rf-rotated, cooled and compressed into a recirculating linac for acceleration, and then transferred into a storage ring collider. The keys to high luminosity are maximal μ collection and cooling; innovations with these goals are presented, and future plans for collider development are discussed. This example demonstrates a novel high-energy collider type, which will permit exploration of elementary particle physics at energy frontiers beyond the reach of currently existing and proposed electron and hadron colliders