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Influence of geometry model approximations on Geant4 simulation results of the Columbus/ISS radiation environment
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2007 (English)In: Radiation Measurements, ISSN 1350-4487, E-ISSN 1879-0925, Vol. 42, no 8, 1342-1350 p.Article in journal (Refereed) Published
Abstract [en]

The influence of geometry model approximations on Geant4 Monte Carlo simulation results of the radiation environment on-board the Columbus module of the International Space Station (ISS) has been investigated. Three geometry models of Columbus with different levels of detail and a geometry model of ISS have been developed. These geometries have been used for Geant4 simulations of the radiation environment inside Columbus induced by trapped protons and Galactic Cosmic Ray protons. Simulated dose rates and particle spectra on-board Columbus for each of the three Columbus models, with or without the ISS geometry model included, are presented and compared. From comparisons of simulated dose rates and particle spectra for the three different geometry models it was found that the most detailed geometry model (750 volumes) produced results similar to a much less detailed model (23 volumes). The most detailed geometry model was concluded to be a sufficiently detailed approximation of the physical Columbus for the purpose of proton induced space radiation studies. The simulated dose rates are compatible with measurements on-board the ISS. The simulation results also show that an increase in shielding thickness decreases the simulated dose rate induced by trapped protons. For Galactic Cosmic Ray protons the dose rate remains unchanged or is slightly increased.

Place, publisher, year, edition, pages
2007. Vol. 42, no 8, 1342-1350 p.
Keyword [en]
radiation protection, Monte Carlo simulation, space station, biological effects of radiation, geometry models, code
Identifiers
URN: urn:nbn:se:kth:diva-17181DOI: 10.1016/j.radmeas.2007.06.001ISI: 000251921900012Scopus ID: 2-s2.0-36148966177OAI: oai:DiVA.org:kth-17181DiVA: diva2:335224
Note
QC 20100525Available from: 2010-08-05 Created: 2010-08-05 Last updated: 2017-12-12Bibliographically approved

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Pearce, Mark

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