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Fast and accurate evaluation of deep-space galactic cosmic ray fluxes with HelMod-4/CUDA

Gervasi, M.; Rancoita, P. G.; Boschini, M. J. +4 more

The accurate knowledge of cosmic ion fluxes is essential for fundamental physics, deep space missions, and exploration activities in the solar system. In the HelMod-4 model the Parker transport equation is solved using a Monte Carlo approach to evaluate the solar modulation effect on local interstellar spectra of Galactic Cosmic Rays (GCRs). This …

Towards understanding time variations of proton to helium ratios in the heliosphere: Implication for the time dependence of the elements of the diffusion tensor

Potgieter, M. S.; Aslam, O. P. M.; Ngobeni, M. D.

A comprehensive three-dimensional numerical model for the modulation of cosmic rays in the heliosphere is applied to investigate the relative roles of the time dependence of the elements of the diffusion tensor on the proton to total Helium (p/He) and Helium-3 to Helium-4 (³He₂/⁴He₂) ratios at rigidities…