arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2007.07719physics.ins-det
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液态氙探测器中光子输运的蒙特卡罗模拟方差减小技术

Monte Carlo Simulation Variance Reduction Techniques for Photon Transport in Liquid Xenon Detectors

S. Bruenner, A. P. Colijn, M. P. Decowski, O. V. Kesber

摘要:

蒙特卡罗模拟是分析和预测液体氙探测器中各种本底组分的重要工具。随着新实验中屏蔽的改进,外部背景的模拟,如探测器材料的伽马射线引起的,计算成本越来越高。我们介绍并验证了加速蒙特卡罗模拟技术在液体氙探测器中的光子输运。该方法模拟光子诱导的相互作用在一个定义的几何形状和能量范围内具有高的统计,而感兴趣的区域以外的相互作用不直接模拟,但考虑到通过概率权重。对于伽马诱导的背景在一个示例性的探测器几何形状的模拟,我们实现了三个数量级的加速度相比,目前吨级Lion暗物质实验的标准模拟。

英文摘要:

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.

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