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Assessment of Galactic Cosmic Ray models

Mrigakshi, Alankrita Isha und Matthiä, Daniel und Berger, Thomas und Reitz, Guenther und Wimmer-Schweingruber, Robert F. (2012) Assessment of Galactic Cosmic Ray models. Journal of Geophysical Research, 117 (A08109), . American Geophysical Union. DOI: 10.1029/2012JA017611.

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Kurzfassung

Among several factors involved in the development of a manned space mission concept, the astronauts' health is a major concern that needs to be considered carefully. Galactic Cosmic Rays (GCRs), which mainly consist of high-energetic nuclei ranging from hydrogen to iron and beyond, pose a major radiation health risk in long-term space missions. It is therefore required to assess the radiation exposure of astronauts in order to estimate their radiation risks. This can be done either by performing direct measurements or by making computer based simulations from which the dose can be derived. A necessary prerequisite for an accurate estimation of the exposure using simulations is a reliable description of the GCR spectra. The aim of this work is to compare GCR models and to test their applicability for the exposure assessment of astronauts. To achieve this, commonly used models capable of describing both light and heavy GCR particle spectra were evaluated by investigating the model spectra for various particles over several decades. The updated Badhwar-O'Neill model published in the year 2010, CREME2009 which uses the International Standard model for GCR, CREME96 and the Burger-Usoskin model were examined. Hydrogen, helium, oxygen and iron nuclei spectra calculated by the different models are compared with measurements from various high-altitude balloon and space-borne experiments. During certain epochs in the last decade, there are large discrepancies between the GCR energy spectra described by the models and the measurements. All the models exhibit weaknesses in describing the increased GCR flux that was observed in 2009-2010

Dokumentart:Zeitschriftenbeitrag
Titel:Assessment of Galactic Cosmic Ray models
Autoren:
AutorenInstitution oder E-Mail-Adresse der Autoren
Mrigakshi, Alankrita Isha German Aerospace Center, Linder Hoehe, 51147 Koeln, Germany
Matthiä, Daniel German Aerospace Center, Linder Hoehe, 51147 Koeln, Germany
Berger, Thomas German Aerospace Center, Linder Hoehe, 51147 Koeln, Germany
Reitz, Guenther German Aerospace Center, Linder Hoehe, 51147 Koeln, Germany
Wimmer-Schweingruber, Robert F. Institute for Experimental and Applied Physics, Christian Albrechts University Kiel, Kiel, Germany
Datum:2012
Erschienen in:Journal of Geophysical Research
Referierte Publikation:Ja
In Open Access:Nein
In SCOPUS:Ja
In ISI Web of Science:Ja
Band:117
DOI :10.1029/2012JA017611
Seitenbereich:
Verlag:American Geophysical Union
Status:veröffentlicht
Stichwörter:Galactic Cosmic Ray Models, CREME96, CREME2009, Badhwar-O'Neill2010 and Burger-Usoskin evaluated over 4 decades, high-altitude balloon measurements, space-borne measurements
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:17 Aug 2012 11:18
Letzte Änderung:23 Jan 2014 11:36

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