PoS - Proceedings of Science
Volume 444 - 38th International Cosmic Ray Conference (ICRC2023) - Cosmic-Ray Physics (Indirect, CRI)
Measurement of the Proton and Helium spectrum with KM2A and WFCTA of the LHAASO experiment
L.Β Wang*, L.Β Ma, S.Β Zhang and C.Β Feng
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Pre-published on: July 25, 2023
Published on: β€”
We report on the measurement with high statistics of the energy spectrum of the light component
(Proton plus Helium nuclei) in cosmic rays by Large High Altitude Air Shower Observatory
(LHAASO) around the knee region. LHAASO is a composite cosmic ray observatory, which
consists of three detector arrays, including the square meter Kilometer Array (KM2A), the Water
Cherenkov Detector Array (WCDA), and the Wide Field of View Cherenkov Telescope Array
(WFCTA). The LHAASO experiment with multiple types of detectors can achieve the multiparameter
measurement of the cosmic ray air shower, the parameters including 𝑁0, 𝐷𝑖𝑠𝑑0, which
are sensitive to the component of the cosmic ray were defined and can be used for the mass
separation. The data used in this work were taken from Nov 1, 2020, to Mar 31, 2021. During that
period the LHAASO consisted of the first six WFCTA telescopes, the first half KM2A array, and
the first water pool ofWCDA. The analysis was performed using only information from combined
observations of WFCTA and KM2A. The energy spectrum of the light component measurement
process based on simulated data is reported in this paper.
DOI: https://doi.org/10.22323/1.444.0413
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