标题： 基于CORSIKA的改进蒙特卡罗模拟得出的EAS无线电波信号波动 显示英文标题

标题： Fluctuations in the EAS radio signal derived with improved Monte Carlo simulations based on CORSIKA

摘要： 宇宙线空气簇射以脉冲无线电辐射的形式发射，这种现象可以理解为由于电子-正电子对在地球磁场中的偏转而产生的相干地同步辐射。 在这里，我们介绍了使用改进版本的蒙特卡洛代码进行的地同步辐射模拟计算。 通过用CORSIKA生成的纵向剖面取代原先以解析参数化表示的纵向空气簇射发展过程，我们研究了由单个空气簇射之间固有波动引起的无线电流量变化。 此外，我们通过比较质子和铁核引发的簇射所产生的辐射，量化了无线电辐射对初级粒子性质的依赖性。 这只是将更现实的空气簇射模型纳入我们的蒙特卡洛代码的第一步。 包括高度真实的基于CORSIKA的粒子能量、动量和空间分布，并辅以电离损失的解析处理，将很快允许对无线电辐射进行前所未有的详细模拟。 这对于评估大半径距离处的辐射强度尤为重要，这在结合KASCADE-Grande测量LOPES记录的无线电信号事件间比较以及考虑用于测量超高能宇宙线无线电辐射的大阵列天线（如LOFAR或皮埃尔·奥格天文台）时非常关键。 显示英文摘要

摘要： Cosmic ray air showers are known to emit pulsed radio emission which can be understood as coherent geosynchrotron radiation arising from the deflection of electron-positron pairs in the earth's magnetic field. Here, we present simulations carried out with an improved version of our Monte Carlo code for the calculation of geosynchrotron radiation. Replacing the formerly analytically parametrised longitudinal air shower development with CORSIKA-generated longitudinal profiles, we study the radio flux variations arising from inherent fluctuations between individual air showers. Additionally, we quantify the dependence of the radio emission on the nature of the primary particle by comparing the emission generated by proton- and iron-induced showers. This is only the first step in the incorporation of a more realistic air shower model into our Monte Carlo code. The inclusion of highly realistic CORSIKA-based particle energy, momentum and spatial distributions together with an analytical treatment of ionisation losses will soon allow simulations of the radio emission with unprecedented detail. This is especially important to assess the emission strengths at large radial distances, needed for event-to-event comparisons of the radio signals measured by LOPES in conjunction with KASCADE-Grande and for considerations regarding large arrays of radio antennas intended to measure the radio emission from ultra-high energy cosmic rays, as with LOFAR or in the Pierre Auger Observatory.