Cosmic-ray transport simulation through the atmosphere in the South Atlantic magnetic anomaly

Abstract:

The South Atlantic Magnetic Anomaly (SAMA) is a region where there is a deformation in the Earth's magnetic field that could modify cosmic ray (CR) propagation through the atmosphere. The protons from cosmic rays interact with atmospheric atoms producing high energy neutrons in spallation reactions, which are then moderated to produce a wide energy spectrum, ranging from thermal energies (0.025 eV) to energies of several hundreds of MeV. It is important to study and quantify the cosmic-ray-induced neutron spectrum (CRINS), because the neutrons make an important contribution to the accumulated dose in sensitive devices and aircrew. In this work, we present preliminary results of the CRINS in the atmosphere of the SAMA using the Monte Carlo code MCNPX Monte Carlo N-Particle eXtended) and its comparison with experimental data and the EXPACS code.

Año de publicación:

2012

Keywords:

Fuente:

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