论文标题
液体氙气检测器中光子传输的蒙特卡洛模拟方差降低技术
Monte Carlo Simulation Variance Reduction Techniques for Photon Transport in Liquid Xenon Detectors
论文作者
论文摘要
蒙特卡洛模拟是对液体氙（LXE）探测器中各种背景成分进行分析和预测的关键工具。随着新实验中的屏蔽，外部背景的仿真（例如探测器材料引起的伽玛射线引起）的模拟在计算上变得更加昂贵。我们介绍并验证了一种加速的蒙特卡洛模拟技术，用于液体氙气检测器中的光子传输。该方法模拟了具有高统计的定义几何形状和能量范围内的光子诱导的相互作用，而在感兴趣区域之外的相互作用并未直接模拟，而是通过概率权重来考虑。对于示例性检测器几何形状中伽马引起的背景的模拟，与当前吨尺度LXE暗物质实验的标准模拟相比，我们达到了三个数量级加速度。
Monte Carlo simulations are a crucial tool for the analysis and prediction of various background components in liquid xenon (LXe) detectors. With improving shielding in new experiments, the simulation of external backgrounds, such as induced by gamma rays from detector materials, gets more computationally expensive. We introduce and validate an accelerated Monte Carlo simulation technique for photon transport in liquid xenon detectors. The method simulates photon-induced interactions within a defined geometry and energy range with high statistics while interactions outside of the region of interest are not simulated directly but are taken into account by means of probability weights. For a simulation of gamma induced backgrounds in an exemplary detector geometry we achieve a three orders of magnitude acceleration compared to a standard simulation of a current ton-scale LXe dark matter experiment.
