论文标题
减少雅典娜WFI带电的粒子背景：Geant4模拟的结果
Reducing the Athena WFI charged particle background: Results from Geant4 simulations
论文作者
论文摘要
ESA的雅典娜X射线观测站上的宽场成像仪（WFI）的科学目标之一是绘制宇宙中的热气结构，例如星系群和星系组和播层间介质。对微弱的弥漫性来源的这些深刻观察需要低背景和对该背景的最佳知识。 WFI背景工作组正在从各个方向来解决此问题。在这里，我们介绍了与雅典娜上的结构相互作用的宇宙射线颗粒的GEANT4模拟的分析，并在WFI中产生信号。我们搜索这些粒子轨道和检测到的事件之间的现象学相关性，否则将被归类为X射线，并探索利用这些相关性以在地面处理中标记或拒绝此类事件的方法。除了减少Athena WFI仪器背景外，这些结果还适用于理解空间中任何基于硅的X射线检测器中的粒子成分。
One of the science goals of the Wide Field Imager (WFI) on ESA's Athena X-ray observatory is to map hot gas structures in the universe, such as clusters and groups of galaxies and the intergalactic medium. These deep observations of faint diffuse sources require low background and the best possible knowledge of that background. The WFI Background Working Group is approaching this problem from a variety of directions. Here we present analysis of Geant4 simulations of cosmic ray particles interacting with the structures aboard Athena, producing signal in the WFI. We search for phenomenological correlations between these particle tracks and detected events that would otherwise be categorized as X-rays, and explore ways to exploit these correlations to flag or reject such events in ground processing. In addition to reducing the Athena WFI instrumental background, these results are applicable to understanding the particle component in any silicon-based X-ray detector in space.
