Energy- and Activity-Dependent Loss Timescales for Inner Magnetospheric keV-Energy Electrons

Details Energy- and Activity-Dependent Loss Timescales for Inner Magnetospheric keV-Energy Electrons Energy- and Activity-Dependent Loss Timescales for Inner Magnetospheric keV-Energy Electrons

Dec 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011agufmsm22a..06l&link_type=abstract

American Geophysical Union, Fall Meeting 2011, abstract #SM22A-06

Physics

[2730] Magnetospheric Physics / Magnetosphere: Inner, [2764] Magnetospheric Physics / Plasma Sheet, [2772] Magnetospheric Physics / Plasma Waves And Instabilities, [2778] Magnetospheric Physics / Ring Current

Scientific paper

The Hot Electron and Ion Drift Integrator (HEIDI) inner magnetospheric drift physics model has recently been modified to include keV-energy electron scattering rates by VLF chorus and hiss waves, thus allowing for the calculation of the electron phase space distribution in the inner magnetosphere and electron precipitation to the upper atmosphere. Comparisons of calculated electron fluxes are made with low-Earth orbit electron precipitation data and dayside electron measurements to validate the scattering implementation procedure. The energy-dependent scattering rate coefficients are adjusted to take into account geomagnetic activity and plasmapause location, providing a scattering rate that best matches the simulations to the observed electron fluxes. In addition, the electron ring current intensities and spatio-temporal evolution are compared against simulation results for the hot ion species. While the electron total energy content is typically 10 times smaller than the ion total energy content in the inner magnetosphere, it can be significantly higher than this during the late main phase of magnetic storms.

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