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

B. WUNDHEILER (PRESENTADOR); AUGER COLLABORATION, F. SANCHEZ

La Haya

Conferencia; 34th International Cosmic Ray Conference (ICRC); 2015

The AMIGA enhancement (Auger Muons and Infill for the Ground Array) of the Pierre Auger Observatory consists of a 23.5 km2 infill area where air shower particles are sampled by water- Cherenkov detectors at the surface and by 30 m2 scintillation counters buried 2.3 m underground. The Engineering Array of AMIGA, completed since February 2015, includes 37 scintillator mod- ules (290 m2) in a hexagonal layout. In this work, the muon counting performance of the scintil- lation detectors is analysed over the first 20 months of operation. Parametrisations of the detector counting resolution and the lateral trigger probability are presented. Finally, preliminary results on the observed muon lateral distribution function (LDF) are discussed.