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Revised September 2013 with numbers verified by representatives of the synchrotrons(contact C.-J.Lin,LBNL).For existing(future)neutrino beam lines the latest achieved(design)values are given.The main source of neutrinos at proton synchrotrons is from the decay of pions and kaons produced by protons striking a nuclear target.There are different schemes to focus the secondary particles to enhance neutrino flux and/or tune the neutrino energy profile.In wide-band beams(WBB),the neutrino parent mesons are focused over a wide momentum range to obtain maximum neutrino intensity.In narrow-band beams(NBB),the secondary particles are first momentum-selected to produce a monochromatic parent beam.Another approach to generate a narrow-band neutrino spectrum is to select neutrinos that are emitted off-axis relative to the momentum of the parent mesons.For a comprehensive review of the topic,including other historical neutrino beam lines,see the article by S.E.Kopp,“Accelerator-based neutrino
Revised September 2013 with numbers verified by representatives of the synchrotrons (contact C.-J.Lin, LBNL) .For existing (future) neutrino beam lines the latest achieved (design) values are given. The main source of neutrinos at proton synchrotrons is from the decay of pions and kaons produced by protons striking a nuclear target. there are different schemes to focus the secondary particles to enhance neutrino flux and / or tune the neutrino energy profile. In wide-band beams (WBB), the neutrino parent mesons are focused over a wide momentum range to obtain maximum neutrino intensity. In narrow-band beams (NBB), the secondary particles are first momentum-selected to produce a monochromatic parent beam. Another approach to generate a narrow-band neutrino spectrum is to select neutrinos that are emitted off-axis relative to the momentum of the parent mesons. For a comprehensive review of the topic, including other historical neutrino beam lines, see the article by SE Kopp, ”Accelerator-based neutrino