University of Oulu

Koldobskiy, S., Mishev, A., Kovaltsov, G., Gil, A., & Usoskin, I. (2021, July 5). New neutron monitor altitude-dependent yield function and its application to an analysis of neutron-monitor data. Proceedings of 37th International Cosmic Ray Conference — PoS(ICRC2021). 37th International Cosmic Ray Conference.

Neutron monitor altitude-dependent yield function and its application to an analysis of neutron-monitor data

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Author: Mihsev, Alexander1; Koldobskiy, Sergey1,2; Kovaltsov, Gennady3;
Organizations: 1University of Oulu, Finland
2National Research Nuclear University MEPhI, Moscow, Russia
3Ioffe Physical-Technical Institute, St. Petersburg, Russia
4Siedlce University, Institute of Mathematics, Poland
Format: article
Version: published version
Access: open
Online Access: PDF Full Text (PDF, 0.7 MB)
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Language: English
Published: Sissa, 2021
Publish Date: 2021-08-16


An updated yield function (YF) of a standard NM64 neutron monitor (NM) is computed for different atmospheric depths from sea level to 500 g/cm² (∼5.7 km altitude) and is presented as a full parametrization. The NM YF was computed using the PLANETOCOSMICS simulation tool based on the GEANT4 package, applying the NRLMSISE-00 atmospheric model. The yield function was validated using the cosmic-ray spectra directly measured in space by the AMS-02 experiment during the period May 2011 through May 2017 and confronted with count rates of all NM64-type NMs being in operation during this period. Using this approach, the stability of all selected NMs was analyzed for the period 2011–2017, most of NMs appear very stable and suitable for studies of long-term solar modulation of cosmic rays. However, some NMs suffer from instabilities like trends, apparent jumps, or strong seasonal waves in the count rates.

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Series: POS. Proceedings of science
ISSN: 1824-8039
ISSN-E: 1824-8039
ISSN-L: 1824-8039
Volume: 395
Article number: 1247
DOI: 10.22323/1.395.1247
Host publication: Proceedings of 37th International Cosmic Ray Conference (ICRC2021)
Conference: International Cosmic Ray Conference
Type of Publication: B3 Article in conference proceedings
Field of Science: 115 Astronomy and space science
Funding: This work was partially supported by the Academy of Finland (Projects HEAIM 314982 and 316223; QUASARE 330064 and ESPERA 321882), the Russian Science Foundation project no. 20-72-10170, as well as by the International Space Science Institute support to International Team 441: High EneRgy sOlar partICle Events Analysis (HEROIC).
Academy of Finland Grant Number: 314982
Detailed Information: 314982 (Academy of Finland Funding decision)
316223 (Academy of Finland Funding decision)
330064 (Academy of Finland Funding decision)
321882 (Academy of Finland Funding decision)
Copyright information: © Copyright owned by the author(s) under the terms of the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License (CC BY-NC-ND 4.0).