Muon counting using silicon photomultipliers in the AMIGA detector of the Pierre Auger observatory

The Pierre Auger Collaboration

    Research output: Contribution to journalReview articlepeer-review

    Abstract

    AMIGA (Auger Muons and Infill for the Ground Array) is an upgrade of the Pierre Auger Observatory designed to extend its energy range of detection and to directly measure the muon content of the cosmic ray primary particle showers. The array will be formed by an infill of surface water-Cherenkov detectors associated with buried scintillation counters employed for muon counting. Each counter is composed of three scintillation modules, with a 10 m2 detection area per module. In this paper, a new generation of detectors, replacing the current multi-pixel photomultiplier tube (PMT) with silicon photo sensors (aka. SiPMs), is proposed. The selection of the new device and its front-end electronics is explained. A method to calibrate the counting system that ensures the performance of the detector is detailed. This method has the advantage of being able to be carried out in a remote place such as the one where the detectors are deployed. High efficiency results, i.e. 98 % efficiency for the highest tested overvoltage, combined with a low probability of accidental counting (∼2 %), show a promising performance for this new system.

    Original languageEnglish (US)
    Article numberP03002
    JournalJournal of Instrumentation
    Volume12
    Issue number3
    DOIs
    StatePublished - Mar 3 2017

    Keywords

    • Front-end electronics for detector readout
    • Pattern recognition, cluster finding, calibration and fitting methods
    • Performance of high energy physics detectors
    • Photon detectors for UV, visible and IR photons (solid-state) (PIN diodes, APDs, Si-PMTs, G-APDs, CCDs, EBCCDs, EMCCDs etc)

    ASJC Scopus subject areas

    • Mathematical Physics
    • Instrumentation

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