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

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

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Kurzfassung

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.

Dokumentart:Zeitschriftenbeitrag
Titel:How Galactic Cosmic Ray models affect the estimation of radiation exposure in space
Autoren:
AutorenInstitution oder E-Mail-Adresse der Autoren
Mrigakshia, Alankrita Isha DLR - German Aerospace Center, Institute of Aerospace Medicine, Department of Radiation Biology, Linder Hoehe 1, 51147 Cologne, Germany
Matthiä, DanielDLR - German Aerospace Center, Institute of Aerospace Medicine, Department of Radiation Biology, Linder Hoehe 1, 51147 Cologne, Germany
Berger, ThomasDLR - German Aerospace Center, Institute of Aerospace Medicine, Department of Radiation Biology, Linder Hoehe 1, 51147 Cologne, Germany
Reitz, GüntherDLR - German Aerospace Center, Institute of Aerospace Medicine, Department of Radiation Biology, Linder Hoehe 1, 51147 Cologne, Germany
Wimmer-Schweingruber, Robert F.Christian-Albrechts-University Kiel, Institute of Experimental and Applied Physics, Extraterrestrial Physics, Leibnizstr. 11, 24098 Kiel, Germany
Datum:2012
Erschienen in:Advances in Space Research
Referierte Publikation:Ja
In SCOPUS:Ja
In ISI Web of Science:Ja
Band:51
DOI :10.1016/j.asr.2012.10.017
Seitenbereich:Seiten 825-834
Verlag:Elsevier
Status:veröffentlicht
Stichwörter:Radiation exposure in low-Earth orbit and near-Earth interplanetary space, Galactic cosmic ray models, Monte-Carlo simulations
HGF - Forschungsbereich:Luftfahrt, Raumfahrt und Verkehr
HGF - Programm:Raumfahrt
HGF - Programmthema:Forschung unter Weltraumbedingungen
DLR - Schwerpunkt:Raumfahrt
DLR - Forschungsgebiet:R FR - Forschung unter Weltraumbedingungen
DLR - Teilgebiet (Projekt, Vorhaben):R - Vorhaben Strahlenbiologie
Standort: Köln-Porz
Institute & Einrichtungen:Institut für Luft- und Raumfahrtmedizin > Strahlenbiologie
Hinterlegt von: Kerstin Kopp
Hinterlegt am:07 Nov 2012 11:56
Letzte Änderung:26 Mär 2013 13:43

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