Physics
Scientific paper
Dec 2004
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004agufmsa13a1117f&link_type=abstract
American Geophysical Union, Fall Meeting 2004, abstract #SA13A-1117
Physics
5729 Ionospheres (2459), 6225 Mars, 2427 Ionosphere/Atmosphere Interactions (0335), 2760 Plasma Convection, 2780 Solar Wind Interactions With Unmagnetized Bodies
Scientific paper
The Analyzer of Space Plasmas and Energetic Atoms (ASPERA-3) experiment is currently sampling plasma in the vicinity of Mars. ASPERA-3 determines the electron, ion, and neutral particle components of the plasma using four instruments: Electron Spectrometer (ELS), Ion Mass Analyzer (IMA), Neutral Particle Imager (NPI), and Neutral Particle Detector (NPD). The ELS instrument measures 128 logarithmically spaced samples of the electron spectrum between 1 eV and 20 keV every four seconds. Its 8% energy resolution is used to resolve the carbon dioxide photoelectron peaks which are a dominant feature in the Martian Ionosphere. These same photoelectron signatures from carbon dioxide are also detected at distances greater than 1000 km in the Martian tail, providing experimental observation of electron escape from Mars. Implications of atmospheric escape will be discussed based on these findings.
ASPERA Team
Coates Andrew J.
David Winningham J.
Frahm Rudy A.
Linder D. R.
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