Abstract
In this paper the sensitivity of a future kilometre-sized neutrino detector to detect andmeasure the diffuse flux of high energy neutrinos is evaluated. Event rates inestablished detection channels, such as muon events from charged currentνμ interactions orcascade events from νe and ντ interaction, are calculated using a detailed Monte Carlo simulation. Neutrino fluxesas expected from prompt charm decay in the atmosphere or from astrophysicalsources such as Active Galactic Nuclei are modelled assuming power laws. Theability to measure the normalization and slope of these spectra is then analysed.It is found that the cascade channel generally has a high sensitivity for the detection andcharacterization of the diffuse flux, when compared to what is expected for the upgoing- anddowngoing-muon channels. A flux at the level of the Waxman–Bahcall upper bound shouldbe detectable in all channels separately while a combination of the information of thedifferent channels will allow detection of a flux more than one order of magnitudelower. Neutrinos from the prompt decay of charmed mesons in the atmosphereshould be detectable in future measurements for all but the lowest predictions.
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