The Energetic Particle and Plasma Spectrometer Instrument on the MESSENGER Spacecraft |
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| Authors: | G Bruce Andrews Thomas H Zurbuchen Barry H Mauk Horace Malcom Lennard A Fisk George Gloeckler George C Ho Jeffrey S Kelley Patrick L Koehn Thomas W LeFevere Stefano S Livi Robert A Lundgren Jim M Raines |
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| Institution: | (1) The Johns Hopkins University Applied Physics Laboratory, Laurel, MD, USA;(2) Department of Atmospheric, Oceanic and Space Sciences, University of Michigan, Ann Arbor, MI, USA;(3) University of Maryland, College Park, MD, USA |
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| Abstract: | The Energetic Particle and Plasma Spectrometer (EPPS) package on the MErcury Surface, Space ENvironment, GEochemistry, and
Ranging (MESSENGER) mission to Mercury is composed of two sensors, the Energetic Particle Spectrometer (EPS) and the Fast
Imaging Plasma Spectrometer (FIPS). EPS measures the energy, angular, and compositional distributions of the high-energy components
of the in situ electrons (>20 keV) and ions (>5 keV/nucleon), while FIPS measures the energy, angular, and compositional distributions
of the low-energy components of the ion distributions (<50 eV/charge to 20 keV/charge). Both EPS and FIPS have very small
footprints, and their combined mass (∼3 kg) is significantly lower than that of comparable instruments. |
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| Keywords: | Plasma Spectrometer Ions Electrons Energy Time of flight MESSENGER Mercury |
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