The Giant Radio Array for Neutrino Detection (GRAND) is a next-generation detector designed to collect ultra-high energy cosmic particles as cosmic rays, neutrinos and photons, in order to solve the long-standing mystery of their origin. It will consist in an array of 200,000 radio antennas deployed over 200,000 square kilometers, about the size of Great Britain, in favorable mountainous locations in the world. It will be the largest ground detector ever built.



Organization chart


The Giant Radio Array for Neutrino Detection project aims at detecting Ultra-High-Energy Cosmic Particles — as neutrinos, cosmic rays and gamma-rays — with a radio antenna array deployed over a total area of 200,000 square kilometers in mountainous regions, in several favorable locations around the world.


The completion and operation of the final configuration of GRAND is a significant undertaking. GRAND will follow a staged construction approach with several prototypes to validate the key steps required for the final configuration. Each prototype will also achieve important science milestones.


GRAND has a staged construction plan designed to validate detection techniques, produce science results — even at intermediate stages —, and maintain competitivity compared to other planned experiments.