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UNIVERSITY OF BUCHAREST
FACULTY OF PHYSICS Guest
2024-11-22 1:56 |
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Conference: Bucharest University Faculty of Physics 2010 Meeting
Section: Atomic and Molecular Physics; Astrophysics
Title:
Simulation of space radiation for nanosatellites in Earth orbit
Authors:
Marius Trusculescu, Octavian Sima
Affiliation:
University of Bucharest, Faculty of Physics, Atomistilor 405, Bucharest-Magurele, Romania
E-mail
marius.trusculescu@gmail.com
Keywords:
radiation, radiation effects, Monte Carlo simulation, satellites, cosmic particles
Abstract:
This paper presents ongoing research in quantifying space radiation effects on satellite subsystems. The main objective is to best characterize the functioning of nanosatellites under the space radiation environment but results can be partially applied to higher class satellites. For this purpose, various particle models were used in computing radiation fluxes estimates for various Low Earth Orbits. The particles considered in describing the radiation environment are trapped protons and electrons, together with protons and ions generated by the Sun and intergalactic cosmic rays. The predicted spectrum of these charged particles was selected to be used in modeling the radiation transport inside the spacecraft. In the second phase of the research a Monte Carlo simulation was conducted for analyzing the particles’ interaction with the satellite subsystems. The geometric and material model of a nanosatellite were implemented both in GEANT 3.21 and Geant 4. Using the previously computed radiation fluxes as input, the particle source was implemented as an isotropic particle gun. Both applications were used to track primary and secondary particles in each of the subsystems until they leave the spacecraft. Total deposited energy in each of the satellite mediums is computed together with the total radiation dose. At the end a comparison is made between results obtained with the two different simulation toolkits.
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