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Multiple scattering measurement with laser events

机译：激光事件的多次散射测量

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The Fluorescence Detector of the Pierre Auger Observatory performs a calorimetric measurement of theprimary energy of cosmic ray showers. The level of accuracy of this technique is determined by the uncertainty in severalparameters, including the fraction of the fluorescence and Cherenkov light reaching the detector after being scattered inthe atmosphere through Rayleigh and Mie processes. A new method to measure this multiple scattering is presented.It relies on the analysis of the image of laser tracks observed by the fluorescence telescopes at various distances tocharacterize the scattering of light and its dependence on the atmospheric conditions. The laser data was systematicallycompared with a dedicated Geant4 simulation of the laser light propagation, allowing for any number of scatterings dueto both Rayleigh and Mie processes, followed by a detailed simulation of the telescopes optics also based on Geant4.
机译：皮埃尔·奥格天文台的荧光探测器对宇宙射线阵雨的一次能量进行量热测量。该技术的准确性水平取决于几个参数的不确定性，其中包括通过瑞利和米氏过程在大气中散射后到达探测器的荧光和切伦科夫光的比例。提出了一种测量这种多重散射的新方法，该方法依赖于荧光望远镜在不同距离观察到的激光轨道图像的分析，以表征光的散射及其对大气条件的依赖性。激光数据与专用的Geant4模拟系统进行了比较，该模拟模拟了激光的传播，由于瑞利过程和Mie过程而产生了任意数量的散射，然后对同样基于Geant4的望远镜光学系统进行了详细的模拟。

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