论文标题
预测大型液体氩探测器中闪烁光信号的传输效应
Predicting Transport Effects of Scintillation Light Signals in Large-Scale Liquid Argon Detectors
论文作者
论文摘要
液体氩被用作中微子物理和暗物质搜索中的检测器培养基。最近的推动力扩大了闪烁光在液体氩时间投影室中微子检测器中的应用，因此需要开发先进的模拟该光的方法。由于探测器大小和中微子束相互作用沉积的能量量的组合，目前可用的方法往往会过慢或不精确。在这项工作中，我们提出了一个半分析模型，以预测光检测器观察到的氩气闪光灯的数量，其精度优于$ 10 \％$，仅基于闪烁和光检测器之间的相对位置。我们还提供了一种预测这些光子到达时间分布的方法，这些光子会涉及传播效应。此外，在检测器阴极上存在波长转移，高度反射层的情况下，我们提出了一个等效模型，以预测光子数量及其到达时间。我们提出的方法可用于模拟大型液体氩探测器（例如沙丘或SBND）中的光传播，也可以应用于其他检测器介质，例如液体氙气或Xenon掺杂的液体氩气。
Liquid argon is being employed as a detector medium in neutrino physics and Dark Matter searches. A recent push to expand the applications of scintillation light in Liquid Argon Time Projection Chamber neutrino detectors has necessitated the development of advanced methods of simulating this light. The presently available methods tend to be prohibitively slow or imprecise due to the combination of detector size and the amount of energy deposited by neutrino beam interactions. In this work we present a semi-analytical model to predict the quantity of argon scintillation light observed by a light detector with a precision better than $10\%$, based only on the relative positions between the scintillation and light detector. We also provide a method to predict the distribution of arrival times of these photons accounting for propagation effects. Additionally, we present an equivalent model to predict the number of photons and their arrival times in the case of a wavelength-shifting, highly-reflective layer being present on the detector cathode. Our proposed method can be used to simulate light propagation in large-scale liquid argon detectors such as DUNE or SBND, and could also be applied to other detector mediums such as liquid xenon or xenon-doped liquid argon.
