Targets and Magnetic Elements for Pion Collection in Muon Collider Drivers

We review quasi‐achromatic magnetic focussing elements which collect pions produced in a target for transport into a π→μ decay channel, with features appropriate to the development of high energy muon colliders. We discuss how the collection and target requirements of a muon collider are different from and similar to existing secondary particle collection systems. We briefly discuss target technology issues.