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Estimating the Effective Energy of Neutron Monitors from 27-Day Variations in Galactic Cosmic Rays

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Bulletin of the Russian Academy of Sciences: Physics Aims and scope

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Abstract

A new way of estimating the effective energy of neutron monitors is proposed. The technique is based on direct observations of 27-day variations of galactic cosmic rays in the AMS-02 experiment at the maximum of solar cycle 24 (2014–2015). The dependence of the amplitude of 27-day variations on particle rigidity is plotted with subsequent determination of the energy at which the amplitude of the neutron monitor’s variations in the count rate during the same time interval becomes equal to the one obtained in space observations. The dependence of the recovered neutron-monitor effective energy on the rigidity of the geomagnetic cutoff obtained by processing the data from several neutron monitors is studied.

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ACKNOWLEDGMENTS

The authors are grateful to Dr. G.A. Bazilevskaya for suggesting that we determine the effective energy of neutron monitors.

Funding

This work was supported by the RF Ministry of Science and Higher Education (state task, project “Fundamental Problems of Cosmic Rays and Dark Matter” no. 0723-2020-0040; state task, project “Fundamental and Applied Research of Cosmic Rays” no. FSWU-2023-0068).

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Authors and Affiliations

  1. National Research Nuclear University MEPhI, 115409, Moscow, Russia

    S. A. Siruk, A. G. Mayorov & R. F. Yulbarisov

Authors
  1. S. A. Siruk
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  2. A. G. Mayorov
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  3. R. F. Yulbarisov
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Corresponding author

Correspondence to S. A. Siruk.

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The authors declare that they have no conflicts of interest.

Additional information

Translated by G. Dedkov

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Siruk, S.A., Mayorov, A.G. & Yulbarisov, R.F. Estimating the Effective Energy of Neutron Monitors from 27-Day Variations in Galactic Cosmic Rays. Bull. Russ. Acad. Sci. Phys. 87, 968–971 (2023). https://doi.org/10.3103/S1062873823702520

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  • DOI: https://doi.org/10.3103/S1062873823702520

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