Journal article
Electron Resonant Interaction With Coherent ULF Waves: Hamiltonian Approach
Journal of geophysical research. Space physics, v 129(4), 2023
01 Apr 2024
Abstract
Electron resonant interaction with ultra-low-frequency (ULF) waves is considered to be a driver of electron radial transport in Earth's inner magnetosphere. Traditional concept of such interaction assumes the electron slow diffusive scattering by a broad-band ULF spectrum, but recent spacecraft observations reported a possibility for electrons to resonate nonlinearly with intense coherent ULF waves. This study proposes a theoretical model describing the main elements of such nonlinear resonant interactions. We implement a Hamiltonian approach to describe equatorial electron motion in a dipole magnetic field and electric ULF wavefield and demonstrate the ULF-electron interactions has two basic nonlinear resonant regimes: phase bunching and phase trapping. Finally, we discuss possible applications of the proposed theoretical approach and the importance of ULF-electron nonlinear resonances.
A Hamiltonian formalism for Euler potentials in a resonant system is proposed The proposed Hamiltonian is used to develop a theoretical model of nonlinear ULF-electron resonant interactions Phase trapping and bunching effects for electron resonances with ultra-low-frequency waves is demonstrated
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Details
- Title
- Electron Resonant Interaction With Coherent ULF Waves: Hamiltonian Approach
- Creators
- Anton Artemyev - Univ Calif Los Angeles, Dept Earth Planetary & Space Sci, Los Angeles, CA 90095 USAXin An - Planetary Science InstituteDmitri Vainchtein - Drexel UniversityRobert Rankin - University of AlbertaXuzhi Zhou - Peking UniversityLi Li - Peking UniversityXiao-Jia Zhang - Univ Calif Los Angeles, Dept Earth Planetary & Space Sci, Los Angeles, CA 90095 USA
- Publication Details
- Journal of geophysical research. Space physics, v 129(4), 2023
- Publisher
- Amer Geophysical Union
- Number of pages
- 20
- Grant note
- 80NSSC23K1038; 80NSSC22K1634; 80NSSC23K0108 / National Aeronautics and Space Administration; National Aeronautics & Space Administration (NASA) NASA; National Aeronautics & Space Administration (NASA)
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- C. and J. Nyheim Plasma Institute
- Web of Science ID
- WOS:001193296600001
- Scopus ID
- 2-s2.0-85189498395
- Other Identifier
- 991021866434104721
InCites Highlights
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- Collaboration types
- Domestic collaboration
- International collaboration
- Web of Science research areas
- Astronomy & Astrophysics