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首页> 外文期刊>Astroparticle physics >REAS3: Monte Carlo simulations of radio emission from cosmic ray air showers using an 'end-point' formalism
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REAS3: Monte Carlo simulations of radio emission from cosmic ray air showers using an 'end-point' formalism

机译：REAS3：使用“端点”形式主义对宇宙射线风淋的无线电发射进行蒙特卡罗模拟

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摘要

In recent years, the freely available Monte Carlo code REAS for modelling radio emission from cosmic ray air showers has evolved to include the full complexity of air shower physics. However, it turned out that in REAS2 and all other time-domain models which calculate the radio emission by superposing the radiation of the single air shower electrons and positrons, the calculation of the emission contributions was not fully consistent. In this article, we present a revised implementation in REAS3, which incorporates the missing radio emission due to the variation of the number of charged particles during the air shower evolution using an "end-point formalism". With the inclusion of these emission contributions, the structure of the simulated radio pulses changes from unipolar to bipolar, and the azimuthal emission pattern becomes nearly symmetric. Remaining asymmetries can be explained by radio emission due to the variation of the net charge excess in air showers, which is automatically taken into account in the new implementation. REAS3 constitutes the first self-consistent time-domain implementation based on single particle emission taking the full complexity of air shower physics into account, and is freely available for all interested users.
机译：近年来，可免费获得的用于模拟宇宙射线空气喷淋的无线电发射的蒙特卡洛代码REAS已经发展到包括空气喷淋物理学的全部复杂性。但是，事实证明，在REAS2和所有其他时域模型中，通过叠加单个空气喷淋电子和正电子的辐射来计算无线电发射，发射贡献的计算并不完全一致。在本文中，我们介绍了REAS3中的修订实现，其中包括由于使用“端点形式主义”在空气淋浴过程中带电粒子数量变化而导致的丢失的无线电发射。通过包含这些发射贡献，模拟的无线电脉冲的结构从单极性变为双极性，并且方位发射模式变得几乎对称。剩余的不对称现象可以通过无线电辐射来解释，这是由于空气淋浴中净电荷过量的变化所致，在新的实现中会自动考虑到这一点。 REAS3构成了第一个基于单个粒子发射的自洽时域实现，同时考虑了空气淋浴物理的全部复杂性，并且对所有感兴趣的用户免费提供。

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