elib
DLR-Header
DLR-Logo -> http://www.dlr.de
DLR Portal Home | Imprint | Contact | Deutsch
Fontsize: [-] Text [+]

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.

Full text not available from this repository.

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.

Document Type:Article
Title:How Galactic Cosmic Ray models affect the estimation of radiation exposure in space
Authors:
AuthorsInstitution or Email of Authors
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
Date:2012
Journal or Publication Title:Advances in Space Research
Refereed publication:Yes
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: Kerstin Kopp
Deposited On:07 Nov 2012 11:56
Last Modified:26 Mar 2013 13:43

Repository Staff Only: item control page

Browse
Search
Help & Contact
Informationen
electronic library is running on EPrints 3.3.12
Copyright © 2008-2012 German Aerospace Center (DLR). All rights reserved.