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Variations of dose rate observed by MSL/RAD in transit to Mars

Guo, Jingnan and Zeitlin, Cary and Wimmer-Schweingruber, Robert F. and Hassler, Donald M. and Posner, Arik and Heber, Bernd and Köhler, Jan and Rafkin, Scot 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 Reitz, Günther (2015) Variations of dose rate observed by MSL/RAD in transit to Mars. Astronomy & Astrophysics, 577, A58. EDP Sciences. DOI: 10.1051/0004-6361/201525680 ISSN 0004-6361

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Official URL: http://dx.doi.org/10.1051/0004-6361/201525680

Abstract

Aims. To predict the cruise radiation environment related to future human missions to Mars, the correlation between solar modulation potential and the dose rate measured by the Radiation Assessment Detector (RAD) has been analyzed and empirical models have been employed to quantify this correlation. Methods. The instrument RAD, onboard Mars Science Laboratory’s (MSL) rover Curiosity, measures a broad spectrum of energetic particles along with the radiation dose rate during the 253-day cruise phase as well as on the surface of Mars. With these first ever measurements inside a spacecraft from Earth to Mars, RAD observed the impulsive enhancement of dose rate during solar particle events as well as a gradual evolution of the galactic cosmic ray (GCR) induced radiation dose rate due to the modulation of the primary GCR flux by the solar magnetic field, which correlates with long-term solar activities and heliospheric rotation. Results. We analyzed the dependence of the dose rate measured by RAD on solar modulation potentials and estimated the dose rate and dose equivalent under different solar modulation conditions. These estimations help us to have approximate predictions of the cruise radiation environment, such as the accumulated dose equivalent associated with future human missions to Mars. Conclusions. The predicted dose equivalent rate during solar maximum conditions could be as low as one-fourth of the current RAD cruise measurement. However, future measurements during solar maximum and minimum periods are essential to validate our estimations.

Item URL in elib:https://elib.dlr.de/96192/
Document Type:Article
Additional Information:Published online
Title:Variations of dose rate observed by MSL/RAD in transit to Mars
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Guo, JingnanInstitute of Experimental and Applied Physics, Christian-Albrechts-University, 24118 Kiel, Germany; e-mail: guo (at) physik.uni-kiel.deUNSPECIFIED
Zeitlin, CarySouthwest Research Institute, Earth, Oceans & Space Department, Durham, NH 0382-3525, USAUNSPECIFIED
Wimmer-Schweingruber, Robert F.Institute of Experimental and Applied Physics, Christian-Albrechts-University, 24118 Kiel, GermanyUNSPECIFIED
Hassler, Donald M.Southwest Research Institute, Space Science and Engineering Division, Boulder, CO 80302, USAUNSPECIFIED
Posner, ArikNASA Headquarters, Science Mission Directorate, Washington DC 20546, USAUNSPECIFIED
Heber, BerndInstitute of Experimental and Applied Physics, Christian-Albrechts-University, 24118 Kiel, GermanyUNSPECIFIED
Köhler, JanInstitute of Experimental and Applied Physics, Christian-Albrechts-University, 24118 Kiel, GermanyUNSPECIFIED
Rafkin, ScotSouthwest Research Institute, Space Science and Engineering Division, Boulder, CO 80302, USAUNSPECIFIED
Ehresmann, BentSouthwest Research Institute, Space Science and Engineering Division, Boulder, CO 80302, USAUNSPECIFIED
Appel, Jan K.Institute of Experimental and Applied Physics, Christian-Albrechts-University, 24118 Kiel, GermanyUNSPECIFIED
Böhm, EckartInstitute of Experimental and Applied Physics, Christian-Albrechts-University, 24118 Kiel, GermanyUNSPECIFIED
Böttcher, StephanInstitute of Experimental and Applied Physics, Christian-Albrechts-University, 24118 Kiel, GermanyUNSPECIFIED
Burmeister, SönkeInstitute of Experimental and Applied Physics, Christian-Albrechts-University, 24118 Kiel, GermanyUNSPECIFIED
Brinza, David E.Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA 91109, USAUNSPECIFIED
Lohf, HenningInstitute of Experimental and Applied Physics, Christian-Albrechts-University, 24118 Kiel, GermanyUNSPECIFIED
Martin, CesarInstitute of Experimental and Applied Physics, Christian-Albrechts-University, 24118 Kiel, GermanyUNSPECIFIED
Reitz, GüntherInstitute of Aerospace Medicine, Deutsches Zentrum für Luft- und Raumfahrt, 51147 Köln, GermanyUNSPECIFIED
Date:2015
Journal or Publication Title:Astronomy & Astrophysics
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:577
DOI :10.1051/0004-6361/201525680
Page Range:A58
Publisher:EDP Sciences
ISSN:0004-6361
Status:Published
Keywords:instrumentation: detectors, space vehicles: instruments, solar-terrestrial relations
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, R - Vorhaben Strahlenbiologie
Location: Köln-Porz
Institutes and Institutions:Institute of Aerospace Medicine > Radiation Biology
Deposited By: Kopp, Kerstin
Deposited On:06 May 2015 10:57
Last Modified:23 Aug 2016 09:50

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