Electron Dynamics and Whistler‐Mode Waves Inside the Short Large‐Amplitude Magnetic Field Structures

Author:

Bai Shi‐Chen123ORCID,Shi Quanqi2ORCID,Zhang Hui2ORCID,Guo Ruilong2ORCID,Shen Xiao‐Chen4ORCID,Liu Terry Z.5ORCID,Degeling Alexander W.2ORCID,Tian Anmin23ORCID,Bu Yude1,Zhang Shuai6ORCID,Wang Mengmeng26ORCID,Ma Xiao2ORCID

Affiliation:

1. School of Mathematics and Statistics Shandong University Weihai China

2. Shandong Provincial Key Laboratory of Optical Astronomy and Solar‐Terrestrial Environment Institute of Space Sciences Shandong University Weihai People's Republic of China

3. State Key Laboratory of Lunar and Planetary Sciences Macau University of Science and Technology Macau China

4. Center for Space Physics Boston University MA Boston USA

5. Department of Earth, Planetary, and Space Sciences University of California CA Los Angeles USA

6. Department of Earth and Space Sciences Southern University of Science and Technology Shenzhen China

Abstract

AbstractWe investigate the electron dynamics and generation of whistler‐mode waves inside a short large‐amplitude magnetic structure (SLAMS) based on Magnetospheric Multiscale Satellite observations and test particle simulations. The buildup of energetic reflected ions caused by the SLAMS's intense magnetic fields favors the resonance condition of solar wind ions of ion‐ion non‐resonant mode. This might further steepen the SLAMS, leading to the Betatron acceleration of electrons and generating the whistler‐mode waves locally ahead of the peak of the magnetic field. In regions behind the peaked magnetic field, electrons are decelerated by the convection electric field during gradient drift and the whistler‐mode waves are rapidly decayed. Our study provides new insights into electron acceleration and the generation of whistler‐mode waves near the quasi‐parallel shock.

Funder

National Natural Science Foundation of China

Publisher

American Geophysical Union (AGU)

Subject

Space and Planetary Science,Geophysics

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