The Radio detection of inclined showers at the Pierre Auger Observatory

THE PIERRE AUGER COLLABORATION.; S. J. SCIUTTO; SIJBRAND DE JONG

Praga

Conferencia; 40th International Conference on High Energy physics - ICHEP2020; 2020

Ultra-high-energy cosmic rays (UHECR), of energy >10 EeV, arrive at the Earth regularly, buttheir sources, acceleration mechanisms, details of propagation through the universe, and particlecomposition remain mysteries. In addition, their interactions with the atmosphere show anunexpectedly high muon flux compared to simulations.To address these issues, the Pierre Auger Observatory, a hybrid 3000 km2 ground based cosmicray detector, is being upgraded, notably adding a completely new detection layer to measure theradio frequency emission of extensive air showers.This Radio Detector extends the vertical shower techniques developed in earlier radio arrays, suchas the Auger Engineering Radio Array, to horizontal showers, with a precision that is expected tobe similar to existing ground array techniques. It will provide a novel measurement for inclinedshowers, complementary to the other techniques.Details of the detection technique, the design and production of the full 1660 station RadioDetector and the expected reach in addressing the open questions in UHECR astroparticle physicsare presented.