HR: 09:15h
AN: SM41B-04    [Abstracts]
TI: Observations of energy spectra and flux isotropization of relativistic electrons during energization events. to relativistic energies.
AU: * Kanekal, S G
EM: shrikanth.kanekal@noaa.gov
AF: Laboratoey for Atmospheric and Space Physics, 1234 Innovation Drive, Boulder, CO 800303 United States
AU: Selesnick, R S
EM: Richard.Selesnick@aero.org
AF: The Aerospace Corporation, 2350 E. El Segundo Blvd., El Segundo, CA 90245 United States
AU: Baker, D N
EM: Daniel.Baker@lasp.colorado.edu
AF: Laboratoey for Atmospheric and Space Physics, 1234 Innovation Drive, Boulder, CO 800303 United States
AU: Blake, J B
EM: JBernard.Blake@aero.org
AF: The Aerospace Corporation, 2350 E. El Segundo Blvd., El Segundo, CA 90245 United States
AB: The various models of electron energization in the Earth's magnetosphere may be broadly classified into two types; models where in-situ processes dominate and models where particle transport dominates. The physics of in-situ processes such as wave-particle resonance and transport processes such as radial diffusion result in distinct features of the energized electrons. These features include pitch angle distributions and timescales for energization and isotropization. Thus, characterization of electron acceleration properties such as electron spectra and flux isotropization are important in understanding acceleration models. We report here on measurements of electron spectra and isotropization time scales select electron energization events. We use sensors onboard SAMPEX and POLAR to measure these properties. SAMPEX measurements cover the entire outer zone for more than a decade from mid 1992 to mid 2004 and POLAR covers the time period from mid 1996 to the present. Pulse height analyzed data from the PET detector onboard SAMPEX are used to measure electron spectra. Flux isotrpization is measured by comparing SAMPEX and POLAR fluxes. We will use global field models such as the Tsyaganenko-96 model, to calculate the L parameter during geomagnetically disturbed times.
DE: 2716 Energetic particles, precipitating
DE: 2720 Energetic particles, trapped
DE: 2788 Storms and substorms
SC: SPA-Magnetospheric Physics [SM]
MN: 2005 Joint Assembly