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MODELING THE VARIATIONS OF DOSE RATE MEASURED BY RAD DURING THE FIRST MSL MARTIAN YEAR: 2012–2014

Guo, Jingnan and Zeitlin, Cary and Wimmer-Schweingruber, Robert F. and Rafkin, Scot and Hassler, Donald M. and Posner, Arik and Heber, Bernd and Köhler, Jan and Ehresmann, Bent and Appel, Jan K. and Böhm, Eckart and Böttcher, Stephan and Burmeister, Sönke and Brinza, David E. and Lohf, Henning and Martin, Cesar and Kahanpää, H. and Reitz, Günther (2015) MODELING THE VARIATIONS OF DOSE RATE MEASURED BY RAD DURING THE FIRST MSL MARTIAN YEAR: 2012–2014. The Astrophysical Journal, 810 (1), p. 24. American Astronomical Society. DOI: 10.1088/0004-637X/810/1/24 ISSN 0004-637X

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Official URL: http://dx.doi.org/10.1088/0004-637X/810/1/24

Abstract

The Radiation Assessment Detector (RAD), on board Mars Science Laboratory's (MSL) rover Curiosity, measures the energy spectra of both energetic charged and neutral particles along with the radiation dose rate at the surface of Mars. With these first-ever measurements on the Martian surface, RAD observed several effects influencing the galactic cosmic-ray (GCR) induced surface radiation dose concurrently: (a) short-term diurnal variations of the Martian atmospheric pressure caused by daily thermal tides, (b) long-term seasonal pressure changes in the Martian atmosphere, and (c) the modulation of the primary GCR flux by the heliospheric magnetic field, which correlates with long-term solar activity and the rotation of the Sun. The RAD surface dose measurements, along with the surface pressure data and the solar modulation factor, are analyzed and fitted to empirical models that quantitatively demonstrate how the long-term influences ((b) and (c)) are related to the measured dose rates. Correspondingly, we can estimate dose rate and dose equivalents under different solar modulations and different atmospheric conditions, thus allowing empirical predictions of the Martian surface radiation environment.

Item URL in elib:https://elib.dlr.de/99574/
Document Type:Article
Title:MODELING THE VARIATIONS OF DOSE RATE MEASURED BY RAD DURING THE FIRST MSL MARTIAN YEAR: 2012–2014
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Guo, JingnanInstitute of Experimental and Applied Physics, Christian-Albrechts-University, Kiel, Germany; guo (at) physik.uni-kiel.deUNSPECIFIED
Zeitlin, CarySouthwest Research Institute, Earth, Oceans & Space Department, Durham, NH, USAUNSPECIFIED
Wimmer-Schweingruber, Robert F.Institute of Experimental and Applied Physics, Christian-Albrechts-University, Kiel, GermanyUNSPECIFIED
Rafkin, ScotSouthwest Research Institute, Space Science and Engineering Division, Boulder, CO, USAUNSPECIFIED
Hassler, Donald M.Southwest Research Institute, Space Science and Engineering Division, Boulder, CO, USAUNSPECIFIED
Posner, ArikNASA Headquarters, Science Mission Directorate, Washington, DC, USAUNSPECIFIED
Heber, BerndInstitute of Experimental and Applied Physics, Christian-Albrechts-University, Kiel, GermanyUNSPECIFIED
Köhler, JanInstitute of Experimental and Applied Physics, Christian-Albrechts-University, Kiel, GermanyUNSPECIFIED
Ehresmann, BentSouthwest Research Institute, Space Science and Engineering Division, Boulder, CO, USAUNSPECIFIED
Appel, Jan K.Institute of Experimental and Applied Physics, Christian-Albrechts-University, Kiel, GermanyUNSPECIFIED
Böhm, EckartInstitute of Experimental and Applied Physics, Christian-Albrechts-University, Kiel, GermanyUNSPECIFIED
Böttcher, StephanInstitute of Experimental and Applied Physics, Christian-Albrechts-University, Kiel, GermanyUNSPECIFIED
Burmeister, SönkeInstitute of Experimental and Applied Physics, Christian-Albrechts-University, Kiel, GermanyUNSPECIFIED
Brinza, David E.Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA, USAUNSPECIFIED
Lohf, HenningInstitute of Experimental and Applied Physics, Christian-Albrechts-University, Kiel, GermanyUNSPECIFIED
Martin, CesarInstitute of Experimental and Applied Physics, Christian-Albrechts-University, Kiel, GermanyUNSPECIFIED
Kahanpää, H.Finnish Meteorological Institute, Helsinki, FinlandUNSPECIFIED
Reitz, GüntherAerospace Medicine, Deutsches Zentrum für Luft- und Raumfahrt, Köln, GermanyUNSPECIFIED
Date:2015
Journal or Publication Title:The Astrophysical Journal
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:810
DOI :10.1088/0004-637X/810/1/24
Page Range:p. 24
Publisher:American Astronomical Society
ISSN:0004-637X
Status:Published
Keywords:instrumentation: detectors; solar–terrestrial relations; space vehicles: instruments
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Space Science and Exploration
DLR - Research area:Raumfahrt
DLR - Program:R EW - Erforschung des Weltraums
DLR - Research theme (Project):R - Vorhaben MSL-Radiation
Location: Köln-Porz
Institutes and Institutions:Institute of Aerospace Medicine > Radiation Biology
Deposited By: Kopp, Kerstin
Deposited On:26 Nov 2015 15:25
Last Modified:06 Sep 2019 15:30

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