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
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.