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Estimation of Galactic Cosmic Ray exposure inside and outside the Earth’s magnetosphere during the recent solar minimum between solar cycles 23 and 24

Mrigakshi, Alankrita Isha und Matthiä, Daniel und Berger, Thomas und Reitz, Günther und Wimmer-Schweingruber, Robert F. (2013) Estimation of Galactic Cosmic Ray exposure inside and outside the Earth’s magnetosphere during the recent solar minimum between solar cycles 23 and 24. Advances in Space Research, 52 (5), Seiten 979-987. Elsevier. DOI: 10.1016/j.asr.2013.05.007. ISSN 0273-1177.

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Kurzfassung

The evidently low solar activity observed between solar cycles 23 and 24 during the years 2008–2010 led to a substantial increase in the Galactic Cosmic Ray (GCR) intensity in comparison with preceding solar minima. As the GCRs consist of highly-ionizing charged particles having the potential to cause biological damage, they are a subject of concern for manned missions to space. With the enhanced particle fluxes observed between 2008 and 2010, it is reasonable to assume that the radiation exposure from GCR must have also increased to unusually high levels. In this paper, the GCR exposure outside and inside the Earth’s magnetosphere is numerically calculated for time periods starting from 1970 to the end of 2011 in order to investigate the increase in dose levels during the years 2008–2010 in comparison with the last three solar minima. The dose rates were calculated in a water sphere, used as a surrogate for the human body, either unshielded or surrounded by aluminium shielding of 0.3, 10 or 40 g/cm². By performing such a long-term analysis, it was estimated that the GCR exposure during the recent solar minimum was indeed the largest in comparison with previous minima and that the increase was more pronounced for locations outside the magnetosphere.

Dokumentart:Zeitschriftenbeitrag
Titel:Estimation of Galactic Cosmic Ray exposure inside and outside the Earth’s magnetosphere during the recent solar minimum between solar cycles 23 and 24
Autoren:
AutorenInstitution oder E-Mail-Adresse der Autoren
Mrigakshi, Alankrita IshaDLR – German Aerospace Center, Institute of Aerospace Medicine, Radiation Biology Department, Linder Höhe, 51147 Cologne, Germany
Matthiä, DanielDLR – German Aerospace Center, Institute of Aerospace Medicine, Radiation Biology Department, Linder Höhe, 51147 Cologne, Germany
Berger, ThomasDLR – German Aerospace Center, Institute of Aerospace Medicine, Radiation Biology Department, Linder Höhe, 51147 Cologne, Germany
Reitz, GüntherDLR – German Aerospace Center, Institute of Aerospace Medicine, Radiation Biology Department, Linder Höhe, 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:2013
Erschienen in:Advances in Space Research
Referierte Publikation:Ja
In SCOPUS:Ja
In ISI Web of Science:Ja
Band:52
DOI :10.1016/j.asr.2013.05.007
Seitenbereich:Seiten 979-987
Verlag:Elsevier
ISSN:0273-1177
Status:veröffentlicht
Stichwörter:Radiation exposure in Low Earth Orbit and near-Earth interplanetary space, Variation of dose rates with shielding over time, Galactic Cosmic Rays, Solar minimum, 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:26 Aug 2013 11:58
Letzte Änderung:21 Okt 2015 12:16

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