No abstract

High-energy neutrino experiments in progress at the Argonne zero-gradient synchrotron (ZGS) employ a wide-angle focusing device 1 to enhance the neutrino or antineutrino flux. Existing data 2-4 on particle production by nuclear interactions of high-energy protons are dispersed over a range of primary energies, target materials, production angles, and secondary energies. In order that the resulting flux may be accurately known, a precise measurement of meson production by 12.5-BeV protons on Be has been completed. Pion-production cross sections have been measured over the angular range from 2° to 16°, and at pion momenta from 1 to 12 BeV/cc Data on kaon production were also obtained in a narrower momentum range. Scattered proton fluxes were measured, and are presented here for their value in pratical beam design.A slow extracted proton beam, ~100-msec duration and 12.5-BeV kinetic energy, was focused onto a Be target of 2.8-cm diameter and 10-, 20-, or 40-cm length. For beam extraction, ordinary internal targets, rather than a jump target, were used, resulting in

No abstract

No abstract