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arXiv 1408.2234astro-ph.HE
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扩展空气簇射无线电信号的数值模拟

Numerical Simulation of Radio Signal from Extended Air Showers

Wei Liu, Xuelei Chen

摘要:

大范围空气簇射的射电爆发为探测超高能宇宙射线提供了一种很有前途的方法。我们的代码是基于一个微观处理,与地球同步辐射和电荷过剩效应包括在内。在这里,我们首先介绍我们的基本程序及其结果。计算了不同极化下的时间信号,发现脉冲信号呈现双极性,频谱向低频方向被抑制,研究了大气中不同高度簇射对总信号的贡献,并分析了不同高度处的信号强度和分布。我们还研究了不同倾角和方位角的簇射信号。在所有这些情况下,我们发现电荷过剩效应很重要。

英文摘要:

The burst of radio emission by the extensive air shower provides a promising alternative for detecting ultra-high energy cosmic rays.We have developed an independent numerical program to simulate these radio signals. Our code is based on a microscopic treatment, with both the geosynchrotron radiation and charge excess effect included. Here we make a first presentation of our basic program and its results. The time signal for different polarizations are computed, we find that the pulses take on a bipolar pattern, the spectrum is suppressed towards the lower frequencies.We investigate how the shower at different heights in atmosphere contribute to the total signal, and examine the signal strength and distribution at sites of different elevations. We also study the signal from showers of different inclination angles and azimuth directions. In all these cases we find the charge excess effect important.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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