Abstract
The Giant Array for Neutrino Detection (GRAND) is a proposal for a giant observatory of ultra-high energy cosmic particles (neutrinos, cosmic rays and gamma rays). It will be composed of twenty subarrays of 10 000 antennas each, totaling a detection area of 200 000 km2. GRAND will reach unprecedented sensitivity to neutrinos allowing to detect cosmogenic neutrinos while its sub-degree angular resolution will also make it possible to hunt for point sources and possibly start neutrino astronomy. Combined with its gigantic exposure to ultra-high energy cosmic rays and gamma rays, GRAND will be a powerful tool to solve the century-long mistery of the nature and origin of the particles with highest energy in the Universe. On the path to GRAND, the GRANDProto300 experiment will be deployed in 2020 over a total area of 200 km2. It primarly aims at validating the detection concept of GRAND, but also proposes a rich science program centered on a precise and complete measurement of the air showers initiated by cosmic rays with energies between 1016.5and 1018eV, a range where we expect to observe the transition between the Galactic and extra-galactic origin of cosmic rays.
Highlights
The Giant Radio Array for Neutrino Detection (GRAND) will be a network of 20 subarrays of ∼10 000 radio antennas each, deployed in mountainous and radio-quiet sites around the world, totaling a combined area of 200 000 km2
In order to estimate the potential of the GRAND detector for the detection of cosmic neutrinos, an end-to-end simulation chain was developped, composed mostly of computation-effective tools we developed to take into account the very large size of the detector and its complex topography
Nondetection of cosmogenic gamma-rays produced by photopion interaction of UltraHigh Energy Cosmic Rays (UHECRs) with the CMB within 3 years of operation of GRAND would exclude a light composition of UHECRs, while detection of UHE gamma rays from nearby sources would on the other hand probe the diffuse cosmic radio background [20] for instance
Summary
The Giant Radio Array for Neutrino Detection (GRAND) will be a network of 20 subarrays of ∼10 000 radio antennas each, deployed in mountainous and radio-quiet sites around the world, totaling a combined area of 200 000 km. The Giant Radio Array for Neutrino Detection (GRAND) will be a network of 20 subarrays of ∼10 000 radio antennas each, deployed in mountainous and radio-quiet sites around the world, totaling a combined area of 200 000 km2 It will form an observatory of unprecedented sensitivity for ultra-high energy cosmic particles (neutrinos, cosmic rays and gamma rays). We first detail the GRAND detection concept, its science case and experimental challenges. In a second part we detail the GRANDProto300 experiment, a pathfinder for GRAND, and an appealing scientific project on its own
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
