Neutrino factory and beta beam: accelerator options for future neutrino experiments

Two accelerator options for producing intense neutrino beams are described – a Neutrino Factory based on stored muon beams and a Beta Beam facility based on stored beams of beta unstable ions. Technical challenges for each are described and current R&D efforts aimed at mitigating these challenges are indicated. Progress is being made in the design of both types of facility, each of which would extend the state-of-the-art in accelerator science.