论文标题
倾斜的空气淋浴的放射发射足迹的折射率模拟了
Refractive displacement of the radio-emission footprint of inclined air showers simulated with CoREAS
论文作者
论文摘要
由于地磁和电荷辐射的叠加，已知广泛的空气淋浴发射的无线电发射足迹出现不对称。对于倾斜的空气，几何早期效应效果进一步打扰了信号分布。对这些不对称的校正Coreas模拟显示出具有逼真的折射率轮廓的大气中高度倾斜淋浴的信号分布的其他干扰。实际上，这种额外的明显不对称性是由于蒙特卡罗淋浴冲击点在地面上的系统位移。我们在地面上找到了$ \ sim 1500 \，\ text {m} $的位移，用于淋浴，顶部为$ 85^\ circ $，这说明了效果与实际应用有关。根据Snell定律，通过在大气中折射描述这种位移的模型与我们对Coreas模拟的观察结果有很好的一致性。因此，我们得出的结论是，位移是由大气中的折射引起的。
The footprint of radio emission from extensive air showers is known to exhibit asymmetries due to the superposition of geomagnetic and charge-excess radiation. For inclined air showers a geometric early-late effect disturbs the signal distribution further. Correcting CoREAS simulations for these asymmetries reveals an additional disturbance in the signal distribution of highly inclined showers in atmospheres with a realistic refractive index profile. This additional apparent asymmetry in fact arises from a systematic displacement of the radio-emission footprint with respect to the Monte-Carlo shower impact point on the ground. We find a displacement of $\sim 1500\,\text{m}$ in the ground plane for showers with a zenith angle of $85^\circ$, illustrating that the effect is relevant in practical applications. A model describing this displacement by refraction in the atmosphere based on Snell's law yields good agreement with our observations from CoREAS simulations. We thus conclude that the displacement is caused by refraction in the atmosphere.
