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How Galactic Cosmic Ray models affect the estimation of radiation exposure in space

Mrigakshia, Alankrita Isha and Matthiä, Daniel and Berger, Thomas and Reitz, Günther and Wimmer-Schweingruber, Robert F. (2012) How Galactic Cosmic Ray models affect the estimation of radiation exposure in space. Advances in Space Research, 51 (5), pp. 825-834. Elsevier. DOI: 10.1016/j.asr.2012.10.017

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Abstract

The radiation environment in space is a major concern for human spaceflight because of the adverse effects of high levels of radiation on astronauts’ health. Therefore, it is essential to perform radiation risk assessments already during the concept studies of a manned mission. Galactic Cosmic Rays (GCRs) have been identified to be one of the primary sources of radiation exposure in space. This work presents an evaluation of the radiation exposure caused by GCR between 1970 and 2011 in near-Earth interplanetary space and at the orbit of the International Space Station (ISS) by making numerical simulations with the Monte-Carlo framework GEANT4. Commonly used GCR models – CREME96, CREME2009 and Badhwar-O’Neill2010 are used to describe the GCR spectra and the differences arising from the application of these different models in terms of absorbed dose and dose equivalent rates are investigated. Additionally, the depth distribution of these dose quantities and the relative contribution of particles with different energies to the total exposure during solar maximum and minimum conditions are studied. The differences in the spectra, described by the models, result in considerable differences in the estimation of the radiation exposure.

Item URL in elib:https://elib.dlr.de/78282/
Document Type:Article
Title:How Galactic Cosmic Ray models affect the estimation of radiation exposure in space
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Mrigakshia, Alankrita Isha DLR - German Aerospace Center, Institute of Aerospace Medicine, Department of Radiation Biology, Linder Hoehe 1, 51147 Cologne, GermanyUNSPECIFIED
Matthiä, DanielDLR - German Aerospace Center, Institute of Aerospace Medicine, Department of Radiation Biology, Linder Hoehe 1, 51147 Cologne, GermanyUNSPECIFIED
Berger, ThomasDLR - German Aerospace Center, Institute of Aerospace Medicine, Department of Radiation Biology, Linder Hoehe 1, 51147 Cologne, GermanyUNSPECIFIED
Reitz, GüntherDLR - German Aerospace Center, Institute of Aerospace Medicine, Department of Radiation Biology, Linder Hoehe 1, 51147 Cologne, GermanyUNSPECIFIED
Wimmer-Schweingruber, Robert F.Christian-Albrechts-University Kiel, Institute of Experimental and Applied Physics, Extraterrestrial Physics, Leibnizstr. 11, 24098 Kiel, GermanyUNSPECIFIED
Date:2012
Journal or Publication Title:Advances in Space Research
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:51
DOI :10.1016/j.asr.2012.10.017
Page Range:pp. 825-834
Publisher:Elsevier
Status:Published
Keywords:Radiation exposure in low-Earth orbit and near-Earth interplanetary space, Galactic cosmic ray models, Monte-Carlo simulations
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Research under Space Conditions
DLR - Research area:Raumfahrt
DLR - Program:R FR - Forschung unter Weltraumbedingungen
DLR - Research theme (Project):R - Vorhaben Strahlenbiologie
Location: Köln-Porz
Institutes and Institutions:Institute of Aerospace Medicine > Radiation Biology
Deposited By: Kopp, Kerstin
Deposited On:07 Nov 2012 11:56
Last Modified:06 Sep 2019 15:27

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