A simulation study on the electric field spectral dependence of thunderstorm ground enhancements and gamma ray glows
A simulation study on the electric field spectral dependence of thunderstorm ground enhancements and gamma ray glows
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雷暴地面增强和伽马射线辉光电场谱依赖性的模拟研究
DOI：
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发表时间：
2017
期刊：
影响因子：
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通讯作者：
J. Dwyer
中科院分区：
文献类型：
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作者：
E. Cramer;B. Mailyan;S. Celestin;J. Dwyer
我们对有（由于相对论失控电子雪崩- rrea）和没有（光谱修正）雪崩倍增过程产生的光子光谱的变异性进行了全面的模拟分析。尽管一些测量结果明显显示了光谱的可变性，但许多理论研究认为RREA光谱与电场无关。然而，Cramer et al.（2014）的分析计算表明，低电场下的RREA谱不是恒定的，不再是指数型的。利用相对论电子雪崩模型（relativisalistic Electron Avalanche Model）程序，我们模拟了电场组态的各种布局，并研究了预测的光子光谱。由于伽马射线更常被地面探测器观测到，因此本文的主要重点是研究光子能谱。光子光谱的模拟分析可能有助于推断雷雨云中的电场。
We have done a thorough simulation analysis on the variability of the photon spectra produced with (due to Relativistic Runaway Electron Avalanche—RREA) and without (Modification of Spectra) the avalanche multiplication process. Despite some measurements obviously showing a variability of the spectra, numerous theoretical studies consider RREA spectrum independent on the electric field. However, analytical calculations by Cramer et al. (2014) have shown that RREA spectrum under low electric fields is not constant and stops being exponential. Using the Relativistic Electron Avalanche Model code, we model various layouts of the electric field configuration and study the predicted photon spectra. The primary focus of the present paper is to study the photon energy spectra, as gamma rays are more often observed by ground‐based detectors. The simulation analysis of photon spectra potentially can help to deduce electric fields in thunderclouds.