Description
The Giant Radio Array for Neutrino Detection (GRAND) is a project dedicated to the radio detection of ultra-high energy cosmic rays, gamma rays, and neutrinos. It aims at deploying in total 200 000 antennas in about 20 sub-arrays, located in mountainous regions, with a combined area of 200 000 $\rm km^{2}$, making it the largest ground detector ever built. The objective is to detect inclined (> 65°) ultra-high-energy particles from the Universe through the air showers these induce either directly (cosmic rays and photons) or indirectly (charged current neutrino interactions in soil). GRAND will detect the radio-emission of air showers in the 50-200 MHz range. Its expected sensitivity of ~$10^{-10}\,$$\rm GeV cm^{-2} s^{-1} sr^{-1}$ above $5*10^{17}\,$eV combined with its sub-degree angular resolution should allow unveiling the unchartered territory of ultra-high energy neutrinos, secondary particles guaranteed to exist as ultra-high-energy cosmic rays have been detected. GRANDProto300, a prototype of 300 antennas, will be deployed by 2021 and will serve as a test bench for the GRAND project. It should already be able to perform multi-messenger astronomy with detection of cosmic rays and gamma rays in the $10^{16.5}$-$10^{18}\,$eV energy range. GRANDProto300 aims at tackling two significant challenges: autonomous radio detection of air showers and the reconstruction of inclined air showers parameters.
| Related session | Searching for neutrinos |
|---|
