The current status of ALPACA

The Andes Large area PArticle detector for Cosmic ray and Astronomy (ALPACA) is a new air shower array experiment under construction in the Bolivian Andes at the altitude of 4740 m. The aim of the experiment is to explore the southern gamma-ray sky beyond 100 TeV to reveal the yet unknown PeV cosmic-ray accelerators. The surface array consisting of 401 plastic scintillating counters covers 82,800 m$^{2}$ and the underground muon detector array of 3600 m$^2$ area enables the identification of electromagnetic showers from hadronic shower background. A prototype surface array named ALPAQUITA has been running since 2023 and the construction of the underground muon detector will start in 2025. In this presentation, the status of the ALPACA project is reviewed in addition to the initial performance of ALPAQUITA for the hadronic cosmic-ray observations.

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Publication Details

Published
2025-09-24
DOI
https://doi.org/10.22323/1.501.0830
Citations
1
Primary Topic
Delphi Technique in Research
Type
article
Field-Weighted Citation Impact
4.20

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article

The current status of ALPACA

T. Sako
1 citations
Delphi Technique in Research
4.20
article

The current status of ALPACA

T. Sako
article en
1 citations

Abstract

The Andes Large area PArticle detector for Cosmic ray and Astronomy (ALPACA) is a new air shower array experiment under construction in the Bolivian Andes at the altitude of 4740 m. The aim of the experiment is to explore the southern gamma-ray sky beyond 100 TeV to reveal the yet unknown PeV cosmic-ray accelerators. The surface array consisting of 401 plastic scintillating counters covers 82,800 m$^{2}$ and the underground muon detector array of 3600 m$^2$ area enables the identification of electromagnetic showers from hadronic shower background. A prototype surface array named ALPAQUITA has been running since 2023 and the construction of the underground muon detector will start in 2025. In this presentation, the status of the ALPACA project is reviewed in addition to the initial performance of ALPAQUITA for the hadronic cosmic-ray observations.

Universidad de Guadalajara, University of Tokyo, Toray Science Foundation, Japan Society for the Promotion of Science, Institute for Cosmic Ray Research, University of Tokyo
Openalex Percentile: Top 6%
Delphi Technique in Research
4.20
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