The AMIGA detector of the Pierre Auger Observatory: an overview

摘要

The Pierre Auger Observatory is currently being enhanced with the AMIGA detector (Auger Muons and Infillfor the Ground Array) to bring the energy threshold down to 10 17 eV and to enable the muon content of air showers to bedetermined. Its baseline layout consists of a 23.5 km 2 infilled area within the Pierre Auger Observatory array deployedwith synchronised pairs of water-Cherenkov surface stations and buried scintillator counters that sample simultaneouslythe particles of air showers at ground level and at a depth of 2.3 m respectively. At present, both detectors are placedon a triangular grid of 750 m, half the spacing of the main array. In this work we present the status of AMIGA, theperformance of the surface array and the analysis of the first data of the scintillator detectors.