CRT：超高能宇宙射线通过银河系磁场模型传播的数值工具
CRT: A numerical tool for propagating ultra-high energy cosmic rays through Galactic magnetic field models
摘要：
银河系磁场（GMF）对超高能宇宙射线（UHECR）的偏转可能足够强，从而阻碍对UHECR源分布的识别。确定GMF模型对源识别工作的影响的常用方法是回溯宇宙射线。本文通过对相对论运动方程的数值积分，给出了计算带电粒子在银河系磁场模型中传播的公共数值工具CRT。它能够通过预定义和自定义用户创建的磁场向前和向后跟踪具有不同成分的粒子。这些颗粒从各种类型的来源注入，并根据用户进行分配。在这里，我们提出了一些源和磁场模型实现的描述，以及集成例程的验证。
英文摘要：
Deflection of ultra high energy cosmic rays (UHECRs) by the Galactic magnetic field (GMF) may be sufficiently strong to hinder identification of the UHECR source distribution. A common method for determining the effect of GMF models on source identification efforts is backtracking cosmic rays. We present the public numerical tool CRT for propagating charged particles through Galactic magnetic field models by numerically integrating the relativistic equation of motion. It is capable of both forward- and back-tracking particles with varying compositions through pre-defined and custom user-created magnetic fields. These particles are injected from various types of sources specified and distributed according to the user. Here, we present a description of some source and magnetic field model implementations, as well as validation of the integration routines.
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