Current status of ALPACA for exploring sub-PeV gamma-ray sky in Bolivia

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  • uploaded June 26, 2021

Discussion timeslot (ZOOM-Meeting): 20. July 2021 - 12:00
ZOOM-Meeting URL: https://desy.zoom.us/j/91896950007
ZOOM-Meeting ID: 91896950007
ZOOM-Meeting Passcode: ICRC2021
Corresponding Session: https://icrc2021-venue.desy.de/channel/56-New-Instruments-Performance-amp-Future-Projects-for-Ground-Based-Gamma-Ray-Astronomy-GAI/79
Live-Stream URL: https://icrc2021-venue.desy.de/livestream/Discussion-06/7

Abstract:
'ALPACA is a project to construct an air shower array near the Chacaltaya mountain at an altitude of 4,740m in Bolivia. A 83,000 m^2 surface area is covered by 400 scintillating counters of 100cmx100cmx5cm (thick). In addition to this conventional surface array, underground muon detectors covering total 4,000 m^2 allow clear identification of muon components in air showers. Using this array ALPACA will explore sub-PeV gamma-ray sky first time in the Southern hemisphere. The prime target of ALPACA is to reveal PeV cosmic-ray accelerators presumably existing in the galactic plane, including the galactic center. In early 2021, a prototype array ALPAQUITA consisting of 97 surface counters and 1000 m^2 muon detectors is under construction and planned to start data taking in 2021. The next extension to the 200 counters and 4000 m^2 muon detectors named half ALPACA is scheduled in 2022. In this contribution, a general introduction to ALPACA, the current status of ALPAQUITA with its infrastructure, and extension plan after 2022 are presented.'

Authors: Takashi Sako
Co-Authors: for the ALPACA collaboration
Collaboration: ALPACA

Indico-ID: 777
Proceeding URL: https://pos.sissa.it/395/733

Tags:
Presenter: Takashi Sako

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