Extensive air shower Monte Carlo modeling at the ground and aircraft flight altitude in the South Atlantic Magnetic Anomaly and comparison with neutron measurements

Pazianotto, M. T.; Cortés-Giraldo, M.A.; Federico, Claudio Antônio; Hubert, G.; Gonçalez, Odair Lélis; Quesada, J.; Carlson, B. V.

doi:10.1016/j.astropartphys.2016.12.004

Cited by 7 publications

(1 citation statement)

References 31 publications

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“…More details about the flight radiation environment and this methodology can be found in previous work [17]. The primary spectra and angular distributions at flight altitudes were obtained by the Geant4 based gPartAt platform [20] [21] using QGSP_BERT-HP physics list of Geant4. This work evaluates two flight situations where a small aircraft is subjected to high and low doses of radiation; and thus, it is possible to relate it to the effect of the aircraft structure, fuel and passengers in the scattering of neutron radiation in different internal positions.…”

Section: B Flight Environmentmentioning

confidence: 99%

Simulation of Cosmic Radiation Transport Inside Aircraft for Safety Applications

Prado

Pazianotto

Molina

et al. 2020

IEEE Trans. Aerosp. Electron. Syst.

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During the flight, an aircraft is submitted to a radiation environment composed of cosmic-ray-induced particles (CRIP) of which neutrons are responsible for approximately 40% of the crew effective dose and are the main cause of Single Event Effects (SEE) in avionics systems at flight altitudes. A model of Learjet aircraft was developed on Monte Carlo simulation using the MCNPX code in order to detail the CRIP field inside the aircraft. The radiation source modeling was previously developed by a computational platform that simulates the energy and angular distributions of the CRIP along the atmosphere. In this work, we determined the variation of the neutron radiation field in several positions inside the aircraft at 11km and 18 km altitudes and for both equatorial and polar regions. The results suggest that the maximum variation of neutron fluence rate between different positions inside the aircraft shows a tendency of higher differences for a lower energy threshold (thermal and E > 1 MeV) in comparison with those differences for a higher energy threshold (E > 10 MeV). Moreover, the angular distribution results show relevant differences between positions inside aircraft, mainly for thermal neutrons close to the fuel. The general tendency is to enhance these discrepancies for devices with new technologies, due to their lower energy threshold for SEE occurrences.

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Section: B Flight Environmentmentioning

confidence: 99%