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.

中文翻译：

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与增强的磁层电场有关的等离子层嘶嘶声的衰减

我们报告了对流增强的对流和基于Van Allen Probe观测的亚暴响应，在外等离子层黄昏侧发出的嘶嘶声强度减弱。使用测试粒子代码，我们基于由太阳风和极光下极化流驱动的真实磁层电场模型，模拟了高能电子通量的动力学。我们认为增强的磁层电场会引起高能电子的向外和向阳运动，这与黄昏侧的高能电子通量的减少相对应，从而导致随后的嘶嘶波强度衰减。结果表明，增强的电场可以显着改变高能电子的分布，从而为Hiss波的放大提供自由能。