Half ALPACA and its sensitivity to sub-PeV gamma rays from the Galactic Center

ALPACA Collaboration

Research output: Contribution to journalConference articlepeer-review

Abstract

The Andes Large area PArticle detector for Cosmic ray physics and Astronomy (ALPACA) project is under construction near the Chacaltaya mountain at an altitude of 4,740 m in Bolivia. ALPACA has an 82800 m2 surface detector with 401 scintillation detectors.The construction of the half ALPACA, which is an experiment of the half density of air shower array using 200 scintillation detectors, is scheduled for 2022. The cover area of the half ALPACA is the same as ALPACA:82800 m2. In addition to this surface array, underground muon detectors cover 3600 m2 which allows us to identify muon components in the air showers. Using this array, half ALPACA will be cable of exploring sub-PeV gamma-ray sky first time in the Southern hemisphere, including the Galactic Center. The performance of the future half ALPACA observatory derived from detailed Monte Carlo simulations is presented in this contribution.

Original languageEnglish
Article number899
JournalProceedings of Science
Volume395
StatePublished - 18 Mar 2022
Event37th International Cosmic Ray Conference, ICRC 2021 - Virtual, Berlin, Germany
Duration: 12 Jul 202123 Jul 2021

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