Physics
Scientific paper
Dec 2001
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001agufmsm31a0737k&link_type=abstract
American Geophysical Union, Fall Meeting 2001, abstract #SM31A-0737
Physics
2700 Magnetospheric Physics
Scientific paper
In this study, energetic neutral atom (ENA) images from the Medium Energy Neutral Atom (MENA) imager on the Imager for Magnetopause-to-Aurora Global Exploration (IMAGE) observatory are analyzed. In the MENA imager, incident ENAs create secondary electrons at a carbon foil and then strike a detector that records their position and time of impact. The electrons are used to determine the trajectory and time-of-flight of the ENA. Trajectory information and the spacecraft spin enable two-dimensional ENA images to be constructed. The time between the electron and ENA pulses provides an energy measurement if the ENAs are assumed to be hydrogen. Using the energy spectrum of the MENA neutral flux data, images of the plasma ion temperature are created based on estimates of the peak line-of-sight ion temperature. The geomagnetic activity of the magnetosphere in the images ranges from mildly active to stormy. The spatial distribution of ion heating in the magnetosphere during storm activity will be discussed.
Keesee Amy M.
Pollock C. J.
Scime Earl E.
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