LHAASO on Cosmic Ray Knees

LHAASO construction was complete in July 2021. The full array is operating very stably since then. All arrays, KM2A, WCDA and WFCTA are calibrated, including the absolute energy scale at 21 TeV, which was measured by using WCDA and propagated to WFCTA, with the uncertainty will be reduced down <1...

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Bibliographic Details
Main Author: Cao Zhen
Format: Article
Language:English
Published: EDP Sciences 2023-01-01
Series:EPJ Web of Conferences
Online Access:https://www.epj-conferences.org/articles/epjconf/pdf/2023/09/epjconf_uhecr2023_02002.pdf
Description
Summary:LHAASO construction was complete in July 2021. The full array is operating very stably since then. All arrays, KM2A, WCDA and WFCTA are calibrated, including the absolute energy scale at 21 TeV, which was measured by using WCDA and propagated to WFCTA, with the uncertainty will be reduced down <10% in 4 years. The knee of pure proton spectrum will be measured in the first phase of the hybrid measurements of showers using four types of EAS detection techniques started in 2019 winter. Sufficient data have been collected and the analysis is in progress. Since the last run, the second phase were started in 2021 winter. The knee of the iron spectrum is the goal which will take at least 3 years of data collection. CR all-particle spectrum, composition and anisotropy are under analysis.
ISSN:2100-014X