Spatial Analysis of Galactic Cosmic Ray Particles in Low Earth Orbit/Near Equator Orbit Using SPENVIS

An Assessment of Rare Earth Aluminates as Possible Radiation Shields for Artificial Satellites in Low Earth Orbit

“…Total radiation dose deposited at the target by the total set of electrons and protons shown in Table 1, as a function of the shield thickness made of Al 2 O 3 (3.96 g/cm 3 ), YAlO 3 (5.35 g/cm 3 ) and NdAlO 3 ) (6.91 g/cm 3 ). Spectrums were taken from [6]. 1) The total RD deposited at the target without shield is 5847 microGy/hour, of which, 5550 microGy/hour (94.9%) is by contribution of electrons and 297 microGy/hour (5.1%) by contribution of protons; the above is due to the fact that electron flux is ~100 times the proton flux.…”

“…To do this work, we used Geant4 software to calculate the radiation dose that electrons (from 1 to 10 MeV) and protons (from 10 to 500 MeV) deposit at a silicon plate as a function of the thickness of the hollow cubes made with rare earth aluminates and aluminium oxide used as shield. According to [6], these particles with these energies are the dominant fluxes in a low Earth orbit near from equator. In this work, we found that the total radiation dose received by the target without shield is 5847 microGy/hour, which the electrons contribute with 94.9% and the protons with 5.1%.…”

“…3) A source of: a) electrons with kinetic energy between 1 and 10 MeV, and b) protons with kinetic energy between 10 and 500 MeV (see Table 1); these particles were injected isotropically into the target. We used these fluxes because according to [6], are the dominant fluxes for a low Earth orbit (685 km) and near the equator.…”

“…In addition to the fluxes shown in Table 1, we also include a proton flux (0.3 To estimate with Geant 4 software the real radiation dose (RD) per hour deposited at the target for a low Earth orbit, we injected the particles isotropically into the target, for each material, for each thickness, for each particle species (electron and proton), and for each kinetic energy. We used the particle spectrum reported in [6], see Table 1.…”

“…Radiation dose deposited at the target by the total set of electrons shown inTable 1, as a function of the shield thickness made of rare earth aluminates. Electron spectrum was taken from[6].…”