Energization of outer zone electrons:spectral evolution and flux isotropization

Details Energization of outer zone electrons:spectral evolution and flux isotropization Energization of outer zone electrons:spectral evolution and flux isotropization

Dec 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005agufmsm42a..04g&link_type=abstract

American Geophysical Union, Fall Meeting 2005, abstract #SM42A-04

Physics

2720 Energetic Particles: Trapped, 2731 Magnetosphere: Outer, 2774 Radiation Belts

Scientific paper

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.

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