Spectral and dynamical properties of October-November 2003 storm injected electrons as observed by TSX5/CEASE

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2788 Storms And Substorms

Scientific paper

The Air Force Research Laboratory Compact Environmental Anomaly Sensor (CEASE) includes a particle telescope (two stacked solid state detectors) that provides several electron channels with threshold energies from 55 keV to 550 keV, and two dosimeters that respond to >1.2 and >3.5 MeV electrons. The first CEASE to fly was launched on the USAF Space Test Program TSX-5 spacecraft on 6 June 2000 into a 410 km by 1750 km, 69 degree inclination orbit and continues to return data up to the present. An intense solar proton event commenced on 28 October 2003, and was followed by a very large geomagnetic storm with two distinct Dst minima recorded on 30 October at 01 hr UT (-363 nT) and 23 hr UT (-401 nT). An intense injection of electrons into the slot region followed, with >1.2 MeV fluxes peaking at approximately L=2.5 on 02 Nov and subsequently decaying away over the next several weeks. The injection was strongly energy dependent, with very different radial and temporal injection profiles observed in the various CEASE channels. The details of the energy-dependent injection and decay profiles will be examined closely to provide a better understanding of the dynamics of this storm interval that raised considerable havoc on a number of spacecraft.

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