Modeling of Oxygen ions in inner magnetosphere during substorms

Jones, S T,. Fok, M. 


The HENA instrument on IMAGE has observed significant increases in the Oxygen
energetic neutral atom (ENA) signature during substorm events. The Hydrogen
signature for the same events show relatively small change. We use a particle
trajectory simulation developed by Delcourt to simulate the response of
magnetospheric Oxygen ions to dipolarization of the geomagnetic field. Our
results show strong injection in the pre-midnight sector during the expansion
phase consistant with observed events.

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Fall Meeting, American Geophysical Union, San Francisco, U.S.A., 
5-9 December 2005