Neutrino factory based on muon storage rings to muon colliders: physics and facilities

Intense muon sources for the purpose of providing intense high energy neutrino beams (ν factory) represents very interesting possibilities. If successful, such efforts would significantly advance the state of muon technology and provides intermediate steps in technologies required for a future high energy muon collider complex. High intensity muon production, capture, cooling, acceleration and multi-turn muon storage rings are some of the key technology issues that needs more studies and developments, and will briefly be discussed here. A muon collider requires basically the same number of muons as for the muon storage ring neutrino factory, but would require more cooling, and simultaneous capture of both ±μ. We present some physics possibilities, a muon storage ring based neutrino facility concept, site specific examples including collaboration feasibility studies, and upgrades to a full collider