Application of New Approximations of the Lateral Distribution of EAS Cherenkov Light in the Atmosphere

Elshoukrofy, A.S.; Sveshnikova, L.; Postnikov, E.; Kalmykov, N.; Korosteleva, E.; Kozhin, V.; Kuzmichev, L.; Lubsandorzhiev, N.; Osipova, E.A.; Panasyuk, M.; Popova, E.G.; Prosin, V.V.; Silaev, A.A.; Silaev, A.A.; Skurikhin, A.V.; TAIGA, c.

Авторы: Elshoukrofy A.Sh, Sveshnikova L., Postnikov E., Kalmykov N., Korosteleva E., Kozhin V., Kuzmichev L., Lubsandorzhiev N., Osipova Eleonora A., Panasyuk M., Popova Elena G., Prosin V.V., Silaev A.A., Silaev Alexey A., Skurikhin A.V., TAIGA collaboration
Журнал: Physics of Atomic Nuclei
Том: 81
Номер: 9
Год издания: 2018
Издательство: Pleiades Publishing, Ltd
Местоположение издательства: Road Town, United Kingdom
Первая страница: 1294
Последняя страница: 1300
DOI: 10.1134/S1063778818090090
Аннотация: Abstract—A new knee-like approximation of the lateral distribution function (LDF) of Cherenkov EAS radiation in the 30–3000 TeV energy range was proposed and tested with simulated showers in our earlier studies. This approximation fits the LDFs of individual showers accurately for all types of primary particles (gamma quanta, protons, and nuclei) and is suitable for reconstructing the shower core, determining the energy, and separating gamma-induced showers from hadron-induced ones. In the present study, the knee-like fitting function is used to determine the parameters of real showers detected by TAIGA-HiSCORE. It is demonstrated that this approximation characterizes properly all types of individual LDFs of experimental events in the 300–3000 TeV range. The accuracy of fit is governed by fluctuations intrinsic to the process of measurement of the Cherenkov photon density. The probability density function of these fluctuations was reconstructed and introduced into simulations. Certain useful methodical applications of the knee-like approximation are considered, and the possibility of shower sorting into nuclei groups is examined. The extensive statistical coverage and detailed LDF measurement data of HiSCORE have provided the first opportunity to examine in depth the LDF of Cherenkov radiation in the 100–3000 TeV range.
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Application of New Approximations of the Lateral Distribution of EAS Cherenkov Light in the Atmosphereстатья

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