Radio Morphing - towards a fast computation of the radio signal from air-showers
Radio Morphing - towards a fast computation of the radio signal from air-showers
复制标题
无线电变形 - 快速计算来自空气喷淋的无线电信号
DOI：
10.1051/epjconf/201921603012
复制
发表时间：
2018
影响因子：
--
通讯作者：
V. Niess
中科院分区：
文献类型：
--
作者：
A. Zilles;O. Martineau;K. Kotera;M. Tueros;Krijn D. de Vries;W. Carvalho;V. Niess
在过去的几十年里，空气簇射的无线电探测已被确立为一种有前途的超高能宇宙射线和中微子探测技术。需要非常大或密集的天线阵列才能熟练地收集有关这些粒子的信息并准确地了解它们的特性。利用此类阵列需要进行大规模的空气喷淋模拟，以评估每个天线位置的无线电信号，同时考虑地面拓扑等特征。为了降低计算成本，我们在通用流星雨模拟的基础上开发了一种对发射的无线电信号进行快速计算的方法，称为无线电变形。该方法包括通过以下方式计算任何空气簇射的无线电信号：i) 参考空气簇射的电场幅度相对于目标簇射的缩放，ii) 模拟位置的等距，以及 iii) 在所需位置插值无线电脉冲。与标准计算相比，该技术使 CPU 时间能够获得多个数量级。在这篇文章中，我们介绍了这个新颖的工具并解释了它的方法。特别是，Radio Morphing 将成为中微子探测巨型无线电阵列 (GRAND) 项目模拟链的关键要素，该项目旨在利用山区 20 万个无线电天线阵列探测超高能中微子。
Over the last decades, radio detection of air showers has been established as a promising detection technique for ultrahigh-energy cosmic rays and neutrinos. Very large or dense antenna arrays are necessary to be proficient at collecting information about these particles and understanding their properties accurately. The exploitation of such arrays requires to run massive air-shower simulations to evaluate the radio signal at each antenna position, taking into account features such as the ground topology. In order to reduce computational costs, we have developed a fast computation of the emitted radio signal on the basis of generic shower simulations, called Radio Morphing. The method consists in the calculation of the radio signal of any air-shower by i) a scaling of the electric-field amplitude of a reference air shower to the target shower, ii) an isometry on the simulated positions and iii) an interpolation of the radio pulse at the desired position. This technique enables one to gain many orders of magnitude in CPU time compared to a standard computation. In this contribution, we present this novel tool and explain its methodology. In particular, Radio Morphing will be a key element for the simulation chain of the Giant Radio Array for Neutrino Detection (GRAND) project, that aims at detecting ultra-high-energy neutrinos with an array of 200 000 radio antennas in mountainous regions.
影响因子：
8.6
作者：
Aab, A.;Abreu, P.;Zuccarello, F.
通讯作者：
Zuccarello, F.