Low energy neutral atoms in the magnetosphere

Details Low energy neutral atoms in the magnetosphere Low energy neutral atoms in the magnetosphere

Mar 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001georl..28.1143m&link_type=abstract

Geophysical Research Letters, Volume 28, Issue 6, p. 1143-1146

Physics

28

Interplanetary Physics: Neutral Particles, Magnetospheric Physics: Magnetosphere/Ionosphere Interactions, Magnetospheric Physics: Solar Wind/Magnetosphere Interactions

Scientific paper

We report observations of low energy neutral atoms (LENA) from the solar wind and the ionosphere, obtained by the LENA Imager on the IMAGE spacecraft. The LENA Imager detects and images LENAs arriving at the spacecraft from within a 90° field of view (8°×8°pixels), swept through 360° every two minutes by spacecraft spin. Neutral atoms arriving at the sensor are converted to negative ions by a conversion surface. The resulting negative ions are separated in energy (3 bins, 10-250 eV) and arrival direction (+/-45°). They are then accelerated, detected, and time-of-flight mass analyzed. The solar wind and the ionosphere both emit measurable neutral atom fluxes, the latter responding rapidly to variations of the former.

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