PoS - Proceedings of Science
Volume 444 - 38th International Cosmic Ray Conference (ICRC2023) - Solar & Heliospheric Physics (SH)
Predicting galactic cosmic ray intensities in the heliosphere employing the HelMod-4 model
M. Boschini, S. Della torre, M. Gervasi, G. La Vacca* and P.G. Rancoita
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Pre-published on: August 03, 2023
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Cosmic ray intensity variation has become a classic heliospheric physics problem that can be addressed through space radiation models. In this scenario, the HelMod-4 model is a more-than-good compromise between the need for a comprehensive theory of particle propagation and an easy-to-use numerical model capable of assessing the solar modulation contribution in various heliospheric scenarios. The HelMod-4 model can assess and forecast the long-term variations of the galactic cosmic ray (GCR) ion spectra making it suitable also for space mission radiation hardness mitigation studies. In the model, a Monte Carlo approach is used to solve the Parker transport equation to evaluate the effect of the solar modulation on the local interstellar spectra of GCRs during high and low solar activity periods, as well as at different distances from the sun and outside the ecliptic plane. In this work, we present the updated parametrization of the HelMod-4 model, focusing on the descending phase of the solar cycle 24, employing a data-driven approach using the latest high-precision data from AMS-02. We will also present how the broader space community could benefit from the model using dedicated web tools.
DOI: https://doi.org/10.22323/1.444.1289
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