Advanced neutrino beams

The observation of neutrino oscillations forms one of the most exciting results in physics in the last decade. It has generated a lot of interest world-wide and many new experiments have been conceived to verify this observation and measure the oscillation parameters. However, a complete understanding of neutrino oscillation phenomenology requires new, high intensity terrestrial facilities. This paper will discuss a number of these new facilities, focussing particularly on the Neutrino Factory. The challenges posed by the design of the machine and R&D required to prove that it can be built will be described.