A neutrino factory or muon collider requires the capture and cooling of a large number of muons. Scenarios for capture, bunching, phase-energy rotation and initial cooling of { \mu}'s produced from a proton source target have been developed, for neutrino factory and muon collider scenarios. They require a drift section from the target, a bunching section and a { \phi}-{ \delta}E rotation section leading into the cooling channel. The currently preferred cooling channel design is an "HFOFO Snake" configuration that cools both { \mu}+ and { \mu}- transversely and longitudinally. The status of the design is presented and variations are discussed.
Categories: physics.acc-ph