论文标题
地球辐射带中电磁离子环的非辐射相对论电子的散射
Nonresonant scattering of relativistic electrons by electromagnetic ion cyclotron waves in Earth's radiation belts
论文作者
论文摘要
在地球辐射带的典型条件下，电磁离子回旋波将倾斜角度散射并引起相对论（$> 1 $ MEV）电子的大气沉淀。但是，这是一个长期以来的谜，这是一个相对论的电子在数百个KEV系列中（但<1美元的MeV）如何与这些波浪共鸣，并与这些波浪同时融合了这些波浪。我们证明，当波数据包短时，非谐波相互作用可以通过在波数空间中引入散布来使$ 100 $ s的kev电子散射。我们将准线性扩散模型概括为包括非谐波效应。所得模型表现出根据波包的短时度的最小共振能量以下散射速率的指数衰减。该广义模型自然解释了数百个keV同时存在的非共振电子沉淀，并> 1 $ MEV沉淀。
Electromagnetic ion cyclotron waves are expected to pitch-angle scatter and cause atmospheric precipitation of relativistic ($> 1$ MeV) electrons under typical conditions in Earth's radiation belts. However, it has been a longstanding mystery how relativistic electrons in the hundreds of keV range (but $<1$ MeV), which are not resonant with these waves, precipitate simultaneously with those $>1$ MeV. We demonstrate that, when the wave packets are short, nonresonant interactions enable such scattering of $100$s of keV electrons by introducing a spread in wavenumber space. We generalize the quasi-linear diffusion model to include nonresonant effects. The resultant model exhibits an exponential decay of the scattering rates extending below the minimum resonant energy depending on the shortness of the wave packets. This generalized model naturally explains observed nonresonant electron precipitation in the hundreds of keV concurrent with $>1$ MeV precipitation.
