The AMIGA Muon Counters of the Pierre Auger Observatory: Performance and Studies of the Lateral Distribution Function

THE PIERRE AUGER COLLABORATION

Proceedings of Science

Proc. of Science

Año: 2016 vol. 236

1824-8039

The AMIGA enhancement (Auger Muons and Infill for the Ground Array) of the Pierre AugerObservatory consists of a 23.5 km2infill area where air shower particles are sampled by waterCherenkov detectors at the surface and by 30 m2scintillation counters buried 2.3 m underground.The Engineering Array of AMIGA, completed since February 2015, includes 37 scintillator modules (290 m2) in a hexagonal layout. In this work, the muon counting performance of the scintillation detectors is analysed over the first 20 months of operation. Parametrisations of the detectorcounting resolution and the lateral trigger probability are presented. Finally, preliminary resultson the observed muon lateral distribution function (LDF) are discussed.