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MSL/RAD RADIATION MEASUREMENTS ON THE SURFACE OF MARS ON THE WAY TO SOLAR MAXIMUM – NEW FINDINGS & UPDATES

Ehresmann, B. and Hassler, D.M. and Zeitlin, C. and Wimmer-Schweingruber, R. and Khaksarighiri, S. and Löffler, S. and Guo, J. and Matthiä, D. and Berger, T. and Reitz, G. (2024) MSL/RAD RADIATION MEASUREMENTS ON THE SURFACE OF MARS ON THE WAY TO SOLAR MAXIMUM – NEW FINDINGS & UPDATES. COSPAR 2024 45th Scientific Assembly, 2024-07-13 - 2024-07-21, Bexco, Busan, Korea.

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Abstract

Mars possesses only a thin atmosphere. Thus high-energy particles (for example, protons with energies > 150 – 170 MeV) can penetrate deep into the atmosphere and ground. Thus, the radiation environment on the surface of Mars consists mainly of Galactic Cosmic Radiation (GCR) and their secondary particles created by interactions in the atmosphere or soil. Additionally, spontaneous Solar Energetic Particles (SEPs), emitted from the Sun during solar storms, can dominate the Martian surface radiation field on short time scales of hours to days. Protecting future human astronauts from exposure to this radiation remains one of the major challenges for the exploration of Mars. To understand this radiation environment and how it changes over time, the Radiation Assessment Detector (RAD) has been measuring the radiation environment on the Martian surface aboard the Curiosity rover since landing in August 2012. The RAD measurements, thereby, provide vital information on the radiation exposure and potential health risks for future human explorers of Mars. As a space weather monitor on Mars at 1.5 AU, RAD measurements also provide valuable information for the space weather and heliophysics communities. For example, they provide insight into the intensity and timing of the arrival of SEPs, in particular their high-energy component. Here, we present updated measurements of the evolution of the Martian surface radiation environment over the last few years during the rising phase of the current solar maximum. Thereby, we mainly focus on measurements of the absorbed radiation dose, and calculations of the dose equivalent based on the quality factor derived from RAD LET (Linear Energy Transfer) measurements. Furthermore, we present updated measurements of SEP events and other relevant solar features, such as Forbush decreases, that RAD was able to detect.

Item URL in elib:https://elib.dlr.de/205408/
Document Type:Conference or Workshop Item (Speech)
Title:MSL/RAD RADIATION MEASUREMENTS ON THE SURFACE OF MARS ON THE WAY TO SOLAR MAXIMUM – NEW FINDINGS & UPDATES
Authors:
AuthorsInstitution or Email of AuthorsAuthor's ORCID iDORCID Put Code
Ehresmann, B.Southwest Research Institute, Boulder, Colorado,UNSPECIFIEDUNSPECIFIED
Hassler, D.M.Southwest Research Institute, Boulder, Colorado, United StatesUNSPECIFIEDUNSPECIFIED
Zeitlin, C.NASA Johnson Space Center, Vallejo, Texas, United StatesUNSPECIFIEDUNSPECIFIED
Wimmer-Schweingruber, R.Christian-Albrechts-Universität zu Kiel, Kiel, GermanyUNSPECIFIEDUNSPECIFIED
Khaksarighiri, S.Christian-Albrechts-Universität zu Kiel, Kiel, GermanyUNSPECIFIEDUNSPECIFIED
Löffler, S.Christian-Albrechts-Universität zu Kiel, Kiel, GermanUNSPECIFIEDUNSPECIFIED
Guo, J.University of Science and Technology of China, Hefei, China: Chinese Academy of Sciences (CAS)UNSPECIFIEDUNSPECIFIED
Matthiä, D.UNSPECIFIEDhttps://orcid.org/0000-0003-1507-0143UNSPECIFIED
Berger, T.UNSPECIFIEDhttps://orcid.org/0000-0003-3319-5740UNSPECIFIED
Reitz, G.Radiation Biology Department, Institute of Aerospace Medicine, German Aerospace Center (DLR), Cologne, Germany.UNSPECIFIEDUNSPECIFIED
Date:July 2024
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Status:Published
Keywords:MSL/RAD RADIATION MEASUREMENTS, Mars, Martian surface, Curiosity rover
Event Title:COSPAR 2024 45th Scientific Assembly
Event Location:Bexco, Busan, Korea
Event Type:international Conference
Event Start Date:13 July 2024
Event End Date:21 July 2024
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Research under Space Conditions
DLR - Research area:Raumfahrt
DLR - Program:R FR - Research under Space Conditions
DLR - Research theme (Project):R - radiation risks
Location: Köln-Porz
Institutes and Institutions:Institute of Aerospace Medicine > Radiation Biology
Deposited By: Kopp, Kerstin
Deposited On:07 Aug 2024 14:41
Last Modified:07 Aug 2024 14:41

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