标题： LUXSim：一种面向组件的低背景模拟方法 显示英文标题

标题： LUXSim: A Component-Centric Approach to Low-Background Simulations

摘要： Geant4已被核物理和高能物理界广泛用于模拟各种探测器和材料中的能量沉积。这些模拟大多是在探测器外部的源束条件下运行的。然而，在低背景物理的情况下，主要关注的是探测器自身部件中固有放射性对探测器的影响。从这个角度来看，并没有单一的源或束流，而是一组可能具有复杂空间范围的源。LUXSim是LUX合作组使用的一个模拟框架，它采用以组件为中心的事件生成和记录方法。一组新的类允许在运行时将多个放射性源设置在任意数量的组件中，整个源集合在单个模拟运行中处理。还可以从各个组件中记录不同级别的信息，这些记录级别也可以在运行时设置。这种在源生成和信息记录方面的灵活性无需重新编译，减少了代码管理和版本扩散的复杂性。在代码本身中，将几何对象在此新类集中进行转换，而不是作为默认的Geant4类，自动将这种灵活性扩展到每个单独的组件。开发者不需要额外的工作，减少了开发时间并提高了结果的信心。我们描述了LUXSim背后的设计原则，详细介绍了其中的一些独特类和方法，并给出了使用示例。* 通讯作者，kareem@llnl.gov 显示英文摘要

摘要： Geant4 has been used throughout the nuclear and high-energy physics community to simulate energy depositions in various detectors and materials. These simulations have mostly been run with a source beam outside the detector. In the case of low-background physics, however, a primary concern is the effect on the detector from radioactivity inherent in the detector parts themselves. From this standpoint, there is no single source or beam, but rather a collection of sources with potentially complicated spatial extent. LUXSim is a simulation framework used by the LUX collaboration that takes a component-centric approach to event generation and recording. A new set of classes allows for multiple radioactive sources to be set within any number of components at run time, with the entire collection of sources handled within a single simulation run. Various levels of information can also be recorded from the individual components, with these record levels also being set at runtime. This flexibility in both source generation and information recording is possible without the need to recompile, reducing the complexity of code management and the proliferation of versions. Within the code itself, casting geometry objects within this new set of classes rather than as the default Geant4 classes automatically extends this flexibility to every individual component. No additional work is required on the part of the developer, reducing development time and increasing confidence in the results. We describe the guiding principles behind LUXSim, detail some of its unique classes and methods, and give examples of usage. * Corresponding author, kareem@llnl.gov