The prototype muon detector modules for the AMIGA project of the Pierre Auger Observatory

AUGER COLLABORATION, A. AAB ET AL. (VER A. ETCHEGOYEN EN PUBLICACIÓN ADJUNTA)

Malargüe, Mendoza

Otro; AMIGA Prototype Modules; 2015

Proyecto Pierre Auger

AMIGA (Auger Muons and Infill for the Ground Array) is an upgrade project of the Pierre Auger Observatory consisting of an infill of surface water-Cherenkov detectors and buried scintillator detectors used for muon counting. The fabrication and deployment processes of the 30 m2 muon counters for the AMIGA engineering array, referred as the Unitary Cell, are described in this document. These muon counters have a modular design in which two 5 m2 and two 10 m2 modules are comprised of a sealed PVC casing containing plastic scintillation bars, wavelength shifter optical fibers, a 64 pixel photomultiplier tube, and acquisition electronics. The modules were buried approximately 2.25 m below ground level in order to minimize the electromagnetic contamination. The mechanical setup, which allows access to the electronics for maintenance, is also described in addition to tests of the modules? response and integrity. The completed Unitary Cell has measured a number of air showers preliminary analyses of which is included here.