PoS - Proceedings of Science
Volume 358 - 36th International Cosmic Ray Conference (ICRC2019) - SH - Solar & Heliospheric
Validation of the neutron monitor yield functions using data from AMS-02 and PAMELA experiments, 2006--2017
S. Koldobskiy,* V. Bindi, C. Corti, G. Kovaltsov, I. Usoskin
*corresponding author
Full text: pdf
Pre-published on: July 24, 2019
Published on:
Spectra of protons and helium directly measured in space by the AMS-02 experiment for the period 2011--2017 and protons measured by the PAMELA experiment for 2006-2014 provide a unique opportunity to calibrate ground-based neutron monitors (NMs). In this work calibration of several stable sea-level NMs (Inuvik, Apatity, Oulu, Newark, Moscow, Hermanus, Athens) was performed using these measured spectra. Four modern NM yield functions were verified: Mi13 (Mishev et al., 2013), Ma16 (Mangeard et al., 2016), CM12 (Caballero-Lopez & Moraal, 2012) and CD00 (Clem & Dorman, 2000). The Mi13 yield function was found to realistically represent the NM response to galactic cosmic rays. CM12 yield function leads to a small skew in the solar cycle dependence of so-called NM scaling factors. In contrast, Ma16 and CD00 yield functions tend to overestimate the NM sensitivity to low-rigidity (<10 GV) cosmic rays. This effect may be important for an analysis of ground level enhancements (GLEs), leading to a potential underestimate of fluxes of solar energetic particles as based on data. The Mi13 yield function is recommended for quantitative analyses of NM data, especially for ground-level enhancements. The results of this work strengthen and validate the method of the cosmic-ray variability analysis based on the NM data and yield-function formalism, and improves its accuracy.
How to cite

Metadata are provided both in "article" format (very similar to INSPIRE) as this helps creating very compact bibliographies which can be beneficial to authors and readers, and in "proceeding" format which is more detailed and complete.

Open Access
Creative Commons LicenseCopyright owned by the author(s) under the term of the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.