Hamiltonian approach to the electron resonant interaction with coherent ULF waves
- 1Drexel University, Nyheim Plasma Institute, Camden, NJ, United States of America (dlv36@drexel.edu)
- 2University of California, Los Angeles, Earth, Planetary, and Space Sciences, Los Angeles, CA, United States of America (aartemyev@igpp.ucla.edu, xinan@epss.ucla.edu
Electron resonant interaction with ultra-low-frequency (ULF) waves is the one of the main drivers of the electron radial transport in the Earth's inner magnetosphere. Recent spacecraft observations reported a possibility for electrons to resonate nonlinearly with intense coherent ULF waves, way beyond traditional approach of a slow diffusive scattering of electrons by a broad-band ULF spectrum. In this study we propose a theoretical model describing key elements of such nonlinear resonant interactions. We adapted the Hamiltonian approach to describe equatorial electron motion in the dipole magnetic field and electric ULF wave field. We demonstrated the presence of two main regimes for ULF-electron interaction: the phase bunching and phase trapping. We discuss possible applications of the proposed theoretical approach and the importance of ULF-electron nonlinear resonance.
How to cite: Vainchtein, D., Artemyev, A., and An, X.: Hamiltonian approach to the electron resonant interaction with coherent ULF waves, EGU General Assembly 2024, Vienna, Austria, 14–19 Apr 2024, EGU24-6588, https://doi.org/10.5194/egusphere-egu24-6588, 2024.