We conducted a statistical analysis of local phase space density (PSD) minima across a wide energy range (∼20 keVs to ∼10 MeV), using observations from the Van Allen Probes and the Geostationary Operational Environmental Satellite. We identified deepening minima in PSD profiles of multi-MeV (∼5% occurrence) and of “seed” electrons (up to 15% occurrence, corresponding to ∼70–100 s keV) and compared their distribution with a 3D diffusion model using the Versatile Electron Radiation Belts (VERB) code. The comparison of the observed and modeled distributions suggests that the PSD minima of seed electrons are likely associated with hiss waves and the corresponding L-shell dependent electron lifetimes. However, the observed distribution was not fully reproduced by the model, potentially indicating other fast loss mechanisms of seed electrons.

中文翻译：

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地球辐射带种子电子相空间密度极小值的分布

我们利用范艾伦探测器和地球静止运行环境卫星的观测结果，对宽能量范围（~20 keVs 至~10 MeV）的局部相空间密度（PSD）最小值进行了统计分析。我们确定了多 MeV（发生率约为 5%）和“种子”电子（发生率高达 15%，对应于 70-100 s keV）的 PSD 轮廓中的加深最小值，并使用 3D 扩散模型将它们的分布进行了比较多功能电子辐射带（VERB）代码。观察到的分布和建模分布的比较表明，种子电子的 PSD 最小值可能与嘶嘶声波和相应的L壳层相关电子寿命有关。然而，模型并未完全再现观察到的分布，这可能表明种子电子的其他快速损失机制。