Precipitation of Relativistic Electrons from the Drift Loss Cone

Details Precipitation of Relativistic Electrons from the Drift Loss Cone Precipitation of Relativistic Electrons from the Drift Loss Cone

Dec 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001agufmsm52a..09l&link_type=abstract

American Geophysical Union, Fall Meeting 2001, abstract #SM52A-09

Physics

2716 Energetic Particles, Precipitating, 2720 Energetic Particles, Trapped, 2788 Storms And Substorms

Scientific paper

On Jan. 22, 2000, the MAXIS (MeV Auroral X-ray and Spectroscopy) experiment observed a relativistic electron precipitation event using balloon-borne X-ray detectors. The X-ray spectrum from this event is consistent with atmospheric bremsstrahlung from precipitating electrons peaked between 2 and 3 MeV. This event occurred at L =3.8 in the duskside southern hemisphere, near the western edge of the South Atlantic Anomaly. Several minutes before the start of the balloon event, the SAMPEX satellite observed an intense relativistic electron microburst event in the dawnside northern hemisphere. Tracing the mirror point of electrons observed by SAMPEX indicates that some of these microburst electrons were located in the drift loss cone, and would have precipitated near the location of the balloon measurement. We model the electron drift and scatter in order to examine how the temporal structure and energy spectrum of the precipitating particles change as they drift around the Earth. These observations have implications for quantifying the loss of relativistic electrons from the radiation belts.

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