HR: 11:05h
AN: SM42A-04    [Abstracts]
TI: Energization of outer zone electrons:spectral evolution and flux isotropization
AU: Green, J C
EM: Janet.Green@noaa.gov
AF: Space Environment center, NOAA, 325 Broadway, Boulder, CO 80305 United States
AU: * Kanekal, S G
EM: shrikanth.kanekal@lasp.colorado.edu
AF: Laboratory for Atmospheric and Space Physics, University of Colorado, 1234 Innovation Drive, Boulder, CO 80303 United States
AU: Selesnick, R S
EM: Richard.Selesnick@aero.org
AF: Space Sciences Department, The Aerospace Corporation, P.O.Box 92957-M2/259, Los Angeles, CA 90009 United States
AU: Baker, D N
EM: Daniel.baker@lasp.colorado.edu
AF: Laboratory for Atmospheric and Space Physics, University of Colorado, 1234 Innovation Drive, Boulder, CO 80303 United States
AU: Blake, J B
EM: JBernard.Blake@aero.org
AF: Space Sciences Department, The Aerospace Corporation, P.O.Box 92957-M2/259, Los Angeles, CA 90009 United States
AB: Evolution of electron spectra and flux isotropization may be important discriminators of models of electron energization in the Earth's outer zone. Current models of electron energization in the Earth's magnetosphere may be broadly classified into two types. One class of models emphasize in-situ processes such as resonant or stochastic wave particle interactions and the second class invokes particle transport process such as enhanced radial diffusdion as the domninant mechansim. We report here on measurements of electron spectra and flux isotropization time scales during electron energization events. Data collected by detectors onboard SAMPEX in low earth orbit and Polar which measures electron fluxes at a much higher altitude are used to measure spectra and flux isotropization. Pulse height analyzed data from the PET detector onboard SAMPEX are used to measure electron spectra. Flux isotropizationis 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. 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.
DE: 2720 Energetic particles: trapped
DE: 2731 Magnetosphere: outer
DE: 2774 Radiation belts
SC: SPA-Magnetospheric Physics [SM]
MN: Fall Meeting 2005