End of CNGS run


8th NBI2012 workshop at CERN


First tau-neutrino candidate detected

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Project Organization:  Secondary Beam WG, Project Team, Technical WG, Commissioning WG
     The figures below show energy distributions of the neutrino fluences expected at Gran Sasso, in logarithmic (left) and linear scale (middle). Also shown, on the right, are the nm and nt charged current event spectra as expected at Gran Sasso. These spectra correspond to the latest version of the CNGS secondary beam layout (November 2000). Numerical values corresponding to these spectra are available on a separate page. Note that almost undistinguishable results are found with two simulation methods: (a - green line) FLUKA99 is used for the hadron production and GEANT3.21 for the tracking of the secondary and the decay processes leading to the neutrino fluences, (b - black line) a parametrisation of the hadron production is used together with a fast neutrino beam simulation code (cf. M. Bonesini et al.). For simplicity, the two models are compared only for the main beam compenent.

NOTE added on 13 April 2005: The FLUKA team has pointed out that the ne energy spectrum as plotted below is wrong. On the other hand, the ratios of CC rates are correct.

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