Simulation of major space particles toward selected materials in a near-equatorial low earth orbit

Wayan Suparta, Siti Katrina Zulkeple

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

A low earth orbit near the equator (LEO-NEqO) is exposed to the highest energies from galactic cosmic rays (GCR) and from trapped protons with a wide range of energies. Moreover, GCR fluxes were seen to be the highest in 2009 to 2010 when communication belonging to the RazakSAT-1 satellite was believed to have been lost. Hence, this study aimed to determine the influence of the space environment toward the operation of LEO-NEqO satellites by investigating the behavior of major space particles toward satellite materials. The space environment was referred to GCR protons and trapped protons. Their fluxes were obtained from the Space Environment Information System (SPENVIS) and their tracks were simulated through three materials using a simulation program called Geometry and Tracking (Geant4). The materials included aluminum (Al), gallium arsenide (GaAs) and silicon (Si). Then the total ionizing dose (TID) and non-ionizing dose (NIEL) were calculated for a three-year period. Simulations showed that GCR traveled at longer tracks and produced more secondary radiation than trapped protons. Al turned out to receive the lowest total dose, while GaAs showed to be susceptible toward GCR than Si. However, trapped protons contributed the most in spacecraft doses where Si received the highest doses. Finally, the comparison between two Geant4 programs revealed the estimated doses differed at < 18 %.

Original languageEnglish
Article number104
JournalAstrophysics and Space Science
Volume362
Issue number5
DOIs
Publication statusPublished - 1 May 2017

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low Earth orbits
cosmic ray
dosage
aerospace environments
protons
silicon
simulation
gallium
equators
aluminum
information systems
energy
material
particle
dose
spacecraft
information system
communication
geometry
radiation

Keywords

  • Galactic cosmic rays
  • Geant4
  • Low earth orbit
  • Simulation
  • Trapped protons

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science

Cite this

Simulation of major space particles toward selected materials in a near-equatorial low earth orbit. / Suparta, Wayan; Zulkeple, Siti Katrina.

In: Astrophysics and Space Science, Vol. 362, No. 5, 104, 01.05.2017.

Research output: Contribution to journalArticle

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