EGU22-2136, updated on 15 May 2024
https://doi.org/10.5194/egusphere-egu22-2136
EGU General Assembly 2022
© Author(s) 2024. This work is distributed under
the Creative Commons Attribution 4.0 License.

Bounce Resonance Scattering of Radiation Belt Energetic Electrons by Extremely Low-Frequency Chorus Waves

Deyu Guo, Zheng Xiang, Binbin Ni, Xing Cao, Song Fu, Ruoxian Zhou, Xudong Gu, Juan Yi, Yingjie Guo, and Luhuai Jiao
Deyu Guo et al.
  • Wuhan University, School of Electronic Information, Department of Space Physics, China (guodeyu@whu.edu.cn)

Bounce-resonant diffusion coefficients of radiation belt energetic electrons induced by extremely low-frequency (ELF) chorus waves are comprehensively evaluated using Van Allen Probes observations on 22 December 2014. ELF chorus waves can efficiently scatter 85° < eq < 89° electrons with bounce resonance pitch angle scattering rates above 10-4/s and energy scattering rates above 10-7/s. By comparing diffusion coefficients due to bounce resonance with those due to cyclotron and Landau resonances, we found that bounce resonance diffusion rates have slight energy dependence for >100 keV electrons while Landau-resonant scattering rates decrease significantly in the MeV energy range. These findings suggest that bounce resonances by ELF chorus waves have potentially significant contributions to the dynamics of energetic electrons and should be considered in the further modeling of Earth’s radiation belts.

How to cite: Guo, D., Xiang, Z., Ni, B., Cao, X., Fu, S., Zhou, R., Gu, X., Yi, J., Guo, Y., and Jiao, L.: Bounce Resonance Scattering of Radiation Belt Energetic Electrons by Extremely Low-Frequency Chorus Waves, EGU General Assembly 2022, Vienna, Austria, 23–27 May 2022, EGU22-2136, https://doi.org/10.5194/egusphere-egu22-2136, 2022.

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