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- SH21G-2571: Measuring high energy (10 MeV - 10 GeV) particles at Mars with the MAVEN Solar Energetic Particle detector, with a focus on Galactic Cosmic Ray modulation throughout the solar cycle (2015-2024).
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Board 2571‚ Hall EFG (Poster Hall)NOLA CC
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Patrick Dunn, University of California Berkeley (First Author, Presenting Author)
Christina Lee, University of California Berkeley
Bent Ehresmann, Southwest Research Institute
Davin Larson, University of California Berkeley
Ali Rahmati, University of California Berkeley, Space Sciences Laboratory
Robert Lillis, Space Sciences Laboratory, University of California Berkeley
In order to observe the proton component of the galactic cosmic ray (GCR) spectrum at the location of Mars (~1.5 AU), we examined just over 10 years of data from the Solar Energetic Particle (SEP) instrument of the Mars Atmosphere and Volatile EvolutioN (MAVEN) mission. Our motivation was to observe how this component changes throughout the solar cycle and compare with GCR theory. The expectation was that the variation should be the same as that observed from Earth (1 AU). We observed a factor of ~2 difference in the count rates at solar minimum versus solar maximum. The end result will be a set of data of differential flux rates as a function of energy, ranging from the date of MAVEN Mars Orbit Insertion on September 21, 2014, to the present date. Such a set will be useful to scientists interested in cosmic rays. Additionally, we compared these spectra inferred in the atmosphere (from the MAVEN-SEP instrument) with measurements from the surface by the Radiation Assessment Detector (RAD) of Mars Science Laboratory (MSL).
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