Theory and simulations of air shower radio emission
Theory and simulations of air shower radio emission
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风淋室无线电发射理论与模拟
DOI：
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发表时间：
2013
期刊：
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通讯作者：
T. Huege
中科院分区：
文献类型：
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作者：
T. Huege
精确了解大范围空气簇射的射电辐射对于宇宙射线射电探测器的设计以及对其数据的分析和解释至关重要。近年来，在宏观和微观框架下对发射物理的理解都取得了巨大的进展。一个一致的画面已经出现：发射主要源于随时间变化的横向电流和随时间变化的电荷过剩;此外，由于大气中的折射率梯度，发射的切伦科夫式压缩可以导致发射脉冲的时间压缩，从而导致信号中的高频贡献。在这篇文章中，我讨论了近年来建模的演变，介绍了今天所理解的发射物理学，最后对目前正在积极开发的模型进行了描述和比较。
A precise understanding of the radio emission from extensive air showers is of fundamental importance for the design of cosmic ray radio detectors as well as the analysis and interpretation of their data. In recent years, tremendous progress has been made in the understanding of the emission physics both in macroscopic and microscopic frameworks. A consistent picture has emerged: the emission stems mainly from time-varying transverse currents and a time-varying charge excess; in addition, Cherenkov-like compression of the emission due to the refractive index gradient in the atmosphere can lead to time-compression of the emitted pulses and thus high-frequency contributions in the signal. In this article, I discuss the evolution of the modelling in recent years, present the emission physics as it is understood today, and conclude with a description and comparison of the models currently being actively developed.