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Macroscopic treatment of radio emission from cosmic ray air showers based on shower simulations

机译:基于阵雨模拟的宇宙射线阵雨的无线电发射的宏观处理

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摘要

We present a macroscopic calculation of coherent electro-magnetic radiation from air showers initiated by ultra-high energy cosmic rays, based on currents obtained from Monte Carlo simulations of air showers in a realistic geo-magnetic field. We can clearly relate the time signal to the time dependence of the currents. We find that the most important contribution to the pulse is related to the time variation of the currents. For showers forming a sufficiently large angle with the magnetic field, the contribution due to the currents induced by the geo-magnetic field is dominant, but neither the charge excess nor the dipole contribution can be neglected. We find a characteristic bipolar signal. In our calculations, we take into account a realistic index of refraction, whose importance depends on the impact parameter and the inclination. Also very important is the role of the positive ions. (C) 2008 Elsevier B.V. All rights reserved.
机译:我们根据在现实的地磁场中从空气淋浴器的蒙特卡洛模拟获得的电流,对超高能宇宙射线引发的空气淋浴器的相干电磁辐射进行宏观计算。我们可以清楚地将时间信号与电流的时间相关性联系起来。我们发现,对脉冲最重要的贡献与电流的时间变化有关。对于与磁场形成足够大角度的阵雨,由地磁场感应的电流引起的贡献占主导地位,但电荷过量和偶极子贡献都不能忽略。我们发现了一个特征性的双极信号。在我们的计算中,我们考虑了实际的折射率,其重要性取决于冲击参数和倾斜度。阳离子的作用也很重要。 (C)2008 Elsevier B.V.保留所有权利。

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