Whistler‐mode hiss waves generally determine MeV electron lifetimes inside the plasmasphere. We use Van Allen Probes measurements to provide the first comprehensive statistical survey of plasmaspheric hiss‐driven quasi‐linear pitch‐angle diffusion rates and lifetimes of MeV electrons as a function of L *, local time, and AE index, taking into account hiss power, electron plasma frequency to gyrofrequency ratio ω _pe /Ω_ce , hiss frequency at peak power ω _m , and cross correlations of these parameters. We find that during geomagnetically active periods with hiss observations, ω _pe /Ω_ce and ω _m decrease, leading to faster electron loss. We demonstrate that spatiotemporal variations of ω _m and ω _pe /Ω_ce with AE , together with wave power changes, significantly affect MeV electron loss, potentially leading to short lifetimes of less than 1 day. A parametric model of MeV electron lifetime driven by AE for L  > 2.5 up to the plasmapause is developed and validated using Magnetic Electron Ion Spectrometer (MagEIS) electron flux decay database.

中文翻译：

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由等离子球的嘶嘶声散射率统计确定的相对论电子的寿命：ωpe/Ωce和波频率依赖性对地磁活动的影响

惠斯勒模式的嘶声波通常决定了等离子层内部的MeV电子寿命。我们使用Van Allen探针测量来提供对等离子球的嘶嘶声驱动的准​​线性螺距角扩散速率和MeV电子寿命作为L *，当地时间和AE指数的函数的首次综合统计调查，同时考虑到他的功率，电子等离子体频率回转频率比ω _PE /Ω _CE，嘶嘶声频率在峰值功率ω_米，以及这些参数的互相关。我们在与嘘声观测，地磁活动周期发现ω _PE /Ω _CE和ω_米减少，导致更快的电子损失。我们证明的那时空变化ω_米和ω _PE /Ω _CE与AE，与波功率的变化一起，显著影响MeV电子损失，从而可能导致的小于1天的短的寿命。利用电磁电子能谱仪（MagEIS）电子通量衰减数据库，建立并验证了AE所驱动的MeV电子寿命的参数模型（对于L  > 2.5直至等离子暂停）。