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Comparison of Martian surface ionizing radiation measurements from MSL-RAD with Badhwar-O'Neill 2011/HZETRN model calculations

Kim, Myung-Hee Y. and Cucinotta, Francis A. and Nounu, Hatem N. and Zeitlin, Cary and Hassler, Donald M. and Rafkin, Scot C. R. and Wimmer-Schweingruber, Robert F. and Ehresmann, Bent and Brinza, David E. and Böttcher, Stephan and Böhm, Eckart and Burmeister, Soenke and Guo, Jingnan and Köhler, Jan and Martin, Cesar and Reitz, Guenther and Posner, Arik and Gómez-Elvira, Javier and Harri, Ari-Matti and the MSL Science Team (2014) Comparison of Martian surface ionizing radiation measurements from MSL-RAD with Badhwar-O'Neill 2011/HZETRN model calculations. JOURNAL OF GEOPHYSICAL RESEARCH-PLANETS, n/a-n/a. Wiley. DOI: 10.1002/2013JE004549 ISSN 2169-9097

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Official URL: http://dx.doi.org/10.1002/2013JE004549


Dose rate measurements from Mars Science Laboratory-radiation assessment detector (MSL-RAD) for 300 sols on Mars are compared to simulation results using the Badhwar-O'Neill 2011 galactic cosmic ray (GCR) environment model and the high-charge and energy transport (HZETRN) code. For the nuclear interactions of primary GCR through Mars atmosphere and Curiosity rover, the quantum multiple scattering theory of nuclear fragmentation is used. Daily atmospheric pressure is measured at Gale Crater by the MSL Rover Environmental Monitoring Station. Particles impinging on top of the Martian atmosphere reach RAD after traversing varying depths of atmosphere that depend on the slant angles, and the model accounts for shielding of the RAD “E” detector (used for dosimetry) by the rest of the instrument. Simulation of average dose rate is in good agreement with RAD measurements for the first 200 sols and reproduces the observed variation of surface dose rate with changing heliospheric conditions and atmospheric pressure. Model results agree less well between sols 200 and 300 due to subtleties in the changing heliospheric conditions. It also suggests that the average contributions of albedo particles (charge number Z < 3) from Martian regolith comprise about 10% and 42% of the average daily point dose and dose equivalent, respectively. Neutron contributions to tissue-averaged effective doses will be reduced compared to point dose equivalent estimates because a large portion of the neutron point dose is due to low-energy neutrons with energies <1 MeV, which do not penetrate efficiently to deep-seated tissues. However the exposures from neutrons to humans on Mars should become an important consideration in radiobiology research and risk assessment.

Item URL in elib:https://elib.dlr.de/89576/
Document Type:Article
Title:Comparison of Martian surface ionizing radiation measurements from MSL-RAD with Badhwar-O'Neill 2011/HZETRN model calculations
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Kim, Myung-Hee Y.Wyle Science, Technology and Engineering, Houston, Texas, USA; myung-hee.y.kim (at) nasa.govUNSPECIFIED
Cucinotta, Francis A.NASA Johnson Space Center, Houston, Texas, USA and University of Nevada Las Vegas, Las Vegas, Nevada, USAUNSPECIFIED
Nounu, Hatem N.Wyle Science, Technology and Engineering, Houston, Texas, USAUNSPECIFIED
Zeitlin, CarySouthwest Research Institute, Durham, New Hampshire, USAUNSPECIFIED
Hassler, Donald M.Southwest Research Institute, Boulder, Colorado, USAUNSPECIFIED
Rafkin, Scot C. R.Southwest Research Institute, Boulder, Colorado, USAUNSPECIFIED
Wimmer-Schweingruber, Robert F.Christian Albrechts University, Kiel, Germany.UNSPECIFIED
Ehresmann, BentSouthwest Research Institute, Boulder, Colorado, USAUNSPECIFIED
Brinza, David E.Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA, USA.UNSPECIFIED
Böttcher, StephanChristian Albrechts University, Kiel, Germany.UNSPECIFIED
Böhm, EckartChristian Albrechts University, Kiel, Germany.UNSPECIFIED
Burmeister, SoenkeChristian Albrechts University, Kiel, Germany.UNSPECIFIED
Guo, JingnanChristian Albrechts University, Kiel, Germany.UNSPECIFIED
Köhler, JanChristian Albrechts University, Kiel, Germany.UNSPECIFIED
Martin, CesarChristian Albrechts University, Kiel, Germany.UNSPECIFIED
Reitz, GuentherGerman Aerospace Center (DLR), Cologne, Germany.UNSPECIFIED
Posner, ArikNASA Headquarters, Washington, DC, USA.UNSPECIFIED
Gómez-Elvira, JavierCentro de Astrobiología (INTA-CSIC), Madrid, Spain.UNSPECIFIED
Harri, Ari-Matti and the MSL Science TeamFinnish Meteorological Institute, Helsinki, FinlandUNSPECIFIED
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In ISI Web of Science:Yes
DOI :10.1002/2013JE004549
Page Range:n/a-n/a
Keywords:Galactic cosmic radiation, radiation transport, dose rate on Martian surface
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:02 Jul 2014 16:52
Last Modified:08 Mar 2018 18:35

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