Parameterized Lifetime of Energetic Electrons due to Interactions with Chorus Waves
- 1GFZ German Research Centre for Geosciences, Section 2.7 Space Physics and Space Weather, Potsdam, Germany (dedong@gfz-potsdam.de)
- 2Institute of Physics and Astronomy, University of Potsdam, Potsdam, Germany
- 3Department of Earth, Planetary, and Space Sciences, University of California, Los Angeles, California, USA
Chorus waves can cause the loss of energetic electrons in the Earth's radiation belts and ring current via pitch-angle diffusion. To quantify the effect of chorus waves on energetic electrons, we calculated the bounce-averaged quasi-linear diffusion coefficients. In this study, using these diffusion coefficients, we parameterize the lifetime of the electrons with an energy range from 1 keV to 2 MeV. In each magnetic local time (MLT), we calculate the lifetime for each energy and L-shell using two different methods. By applying polynomial fits, we parameterize the electron lifetime as a function of L-shell and electron kinetic energy (Ek) in each MLT and geomagnetic activity (Kp). The parameterized electron lifetimes show a strong functional dependence on L-shell and electron energy. During storm time, the lifetimes for higher energy (> 100 keV) electrons range from hours to days in the heart of the radiation belts. In contrast, the lifetimes for electrons with lower energy (< 100 keV) range from minutes to hours. This parameterization of electron lifetime is convenient for inclusion in simulations in the inner magnetosphere.
How to cite: Wang, D., Shprits, Y., and Haas, B.: Parameterized Lifetime of Energetic Electrons due to Interactions with Chorus Waves, EGU General Assembly 2022, Vienna, Austria, 23–27 May 2022, EGU22-1546, https://doi.org/10.5194/egusphere-egu22-1546, 2022.
