Observational analysis uses WCDA to measure atmospheric muon energy spectrum beyond 10 TeV, indicating its effectiveness as a pair-meter.
Abstract The LHAASO (Large High Altitude Air Shower Observatory) experiment is a multi-purpose experiment for gamma-ray astronomy, cosmic ray physics and for many other tasks. Its task number will be undoubtedly extended in future. We proposed to use existing WCDA (Water Cherenkov Detector Array being a part of LHAASO) as a pair-meter to measure atmospheric muon energy spectrum. This work confirms that WCDA without any reconstruction can serve as an optimal pair-meter to study near-horizontal atmospheric muons with energy beyond ~ 10 TeV. In this article we study response of the WCDA detector to Cherenkov light produced by high energy muons and its accompanying, taking into account the cells configuration, possible crosstalk between cells, and photomultiplier (PMT) characteristics.
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Stenkin et al. (2025) studied this question.
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