The Giant Radio Array for Neutrino Detection

The Giant Radio Array for Neutrino Detection (GRAND) is a planned array of similar to 2 . 105 radio antennas deployed over similar to 200 000 km(2) in a mountainous site. It aims primarly at detecting high-energy neutrinos via the observation of extensive air showers induced by the decay in the atmosphere of taus produced by the interaction of cosmic neutrinos under the Earth surface. GRAND aims at reaching a neutrino sensitivity of 5 . 10(-11)E(-2) GeV-1 cm(-2) s(-1) sr(-1) above 3 . 10(16) eV. This ensures the detection of cosmogenic neutrinos in the most pessimistic source models, and similar to 50 events per year are expected for the standard models. The instrument will also detect UHECRs and possibly FRBs. Here we show how our preliminary design should enable us to reach our sensitivity goals, and discuss the steps to be taken to achieve GRAND, while the compelling science case for GRAND is discussed in more details in [1].