DESIGN STUDIES FOR A LONG-BASE-LINE NEUTRINO BEAM

Strong interest has recently been shown in very long base-line neutrin o beams, directed at existing or planned massive detector facilities, in order to extend the search for neutrino oscillations. Among such po ssibilities are beams from CERN pointing towards the Gran Sasso Underg round Laboratory in Italy and the NESTOR Underwater Laboratory in the Ionian Sea off the west coast of the Peloponnese. In order to establis h the basic parameters, a number of possible configurations for such b eams have been studied covering a range of neutrino energy bands; esti mates of the neutrino fluxes, event rates and backgrounds at typical d etectors are reported. Considerations have been given to the optimum l ength and radius of the decay tunnels. It is shown that with one year of operation, a neutrino oscillation search down to limits of sin(2) 2 theta = 1.1 x 10(-2) and Delta m(2) = 3.5 x 10(-4) eV(2) could be mad e with currently proposed detectors.