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ALICE-MEXICO ACORDE group

ACORDE. MAGNET. ALICE CENTRAL DETECTORS. MAGNET. Primary cosmic ray. Extensive air shower. Air Shower Array. 30 m. Subalpine Molasse. muon. LHC. ALICE. ALICE-MEXICO ACORDE group

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ALICE-MEXICO ACORDE group

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  1. ACORDE MAGNET ALICE CENTRAL DETECTORS MAGNET Primary cosmic ray Extensive air shower Air Shower Array 30 m Subalpine Molasse muon LHC ALICE ALICE-MEXICO ACORDE group Benemérita Universidad Autónoma de Puebla, Centro de Investigación y de Estudios Avanzados, Universidad Michoacana de San Nicolás deHidalgo,Universidad Nacional Autónoma de México. ALICE setup, includes the ACORDE (trigger system) on top of the magnet. The TPC is the main detector of ALICE and it will also be used to track atmospheric muons. The TRD and the TOF can be used to improve the event information. . ALICE is located underground with 30 m of overburden rock. Only atmospheric muons with energy Em > 15 GeV can reach the experiment. ACORDE: the proposed trigger system is an array of 60 scintillator modules located on the three top octants of the magnet. They give the trigger signal when atmospheric muons cross the ALICE detectors. • Main physics topics that can be • addressed • with ALICE detectors are: • Inclusive muon spectrum; • Charge ratio m+/m-; • Muon bundles; • Antiproton flux limits at TeV energies. • For each event triggered by ACORDE it is possible to measure : • The muon multiplicity : number of muons crossing the TPC; • Muon direction, charge sign and finally energy. . The primary cosmic ray interacts with the nuclei of the atmosphere generating an extensive air shower. Measuring some air shower parameters (e.g. particle type, direction, density distribution, ...) the primary cosmic ray mass number and energy can be inferred on a statistical base. • An air shower array of 60 counters placed above ALICE could measure: • The number of charged particles called the size Ne; • The location of the core of the shower (xc,yc); • The direction of the shower (q,f). Piramide del Sol, México Events detected with the shower array and with the ALICE detectors will allow studies of cosmic ray composition in the energy range around > 1015 eV with more perspectives than past experiments. The size Ne is an observable that gives information on the energy E of the primary cosmic ray. The core and the direction of the shower give the location of the primary.

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