SMuK 2021 – scientific programme
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EP: Fachverband Extraterrestrische Physik
EP 3: Near Earth Space I
EP 3.2: Talk
Tuesday, August 31, 2021, 11:30–11:45, H8
Exploring radiation belt electron precipitation — •Alina S. Grishina1,2, Yuri Y. Shprits1,2,3, Michael Wutzig1, Hayley J. Allison1, Nikita A. Aseev1,2, Dedong Wang1, and Matyas Szabo-Roberts1,2 — 1GFZ, Potsdam, Germany — 2University of Potsdam, Potsdam, Germany — 3University of California, Los Angeles, Los Angeles, CA, USA
The near-Earth space environment is filled with charged particles gyrating around magnetic field lines, bouncing between the two hemispheres, and drifting around the Earth. The particle flux in this region can increase by orders of magnitude during geomagnetically active periods, driven by plasma sheet injections. Additionally, particles can be lost from the magnetic trapping region via precipitation into Earth's atmosphere, potentially affecting atmospheric chemistry and temperature. To explore this relationship further, we require information about the energy spectrum and energy range of the precipitating particles.
In this research, we concentrate on ring current electrons and investigate precipitation mechanisms using a numerical model based on the Fokker-Planck equation. Chorus wave-particle interactions are included using diffusion coefficients from Wang et al. [2019], and interactions with plasmaspheric hiss waves are included via the diffusion coefficients of Orlova et al. [2016]. The precipitating flux is calculated for discrete values of energy values from 1 to 300 keV. Model output is compared with observations from the POES satellite mission, that allows us to validate the calculated precipitating fluxes at different MLTs, over the ring current energy range.