A thin target scheme for the muon source

A pion production source using a thin target and a recirculating storage ring is considered. The potential advantages of the scheme are: (i) the thin target could allow a better collection efficiency; (ii) the proton beam dump is avoided; (iii) light targets could be used. The disadvantages are: (i) the high beam current stored in the recirculator, (ii) constraints on timing. This scheme could be used for the neutrino factory but not for muon colliders.