The attenuation of plasmaspheric hiss associated with the enhanced magnetospheric electric field
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Published version
Date
2019-06-27
DOI
Authors
Li, Haimeng
Li, Wen
Ma, Qianli
Nishimura, Yukitoshi
Yuan, Zhigang
Shen, Xiaochen
Tang, Rongxin
Deng, Xiaohua
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Published version
OA Version
Citation
H. Li, W. Li, Q. Ma, Y. Nishimura, Z. Yuan, X. Shen, R. Tang, X. Deng. 2019. "The attenuation of plasmaspheric hiss associated with the enhanced magnetospheric electric field."
Abstract
We report an attenuation of hiss wave intensity in
the duskside of the outer plasmasphere in response to enhanced
convection and a substorm based on Van Allen Probe
observations. Using test particle codes, we simulate the dynamics
of energetic electron fluxes based on a realistic magnetospheric
electric field model driven by solar wind and subauroral
polarization stream. We suggest that the enhanced
magnetospheric electric field causes the outward and sunward
motion of energetic electrons, corresponding to the decrease
of energetic electron fluxes on the duskside, leading
to the subsequent attenuation of hiss wave intensity. The results
indicate that the enhanced electric field can significantly
change the energetic electron distributions, which provide
free energy for hiss wave amplification. This new finding
is critical for understanding the generation of plasmaspheric
hiss and its response to solar wind and substorm activity.
Description
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© Author(s) 2021. This work is distributed under the Creative Commons Attribution 4.0 License.