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Searching for dark matter with the DarkSide direct detection experiment

通过 DarkSide 直接探测实验寻找暗物质

基本信息

批准号：
2354523
负责人：
金额：
--
依托单位：
University of Manchester
依托单位国家：
英国
项目类别：
Studentship
财政年份：
2019
资助国家：
英国
起止时间：
2019 至无数据
项目状态：
已结题

来源：
https://gtr.ukri.org/projects?ref=studentship-2354523
关键词：
Searching dark matter DarkSide direct

项目摘要

The DarkSide-20k experiment is a new experiment aiming to detect dark matter via elastic scattering of dark matter particles from space on argon nuclei in the detector. This interaction results in an energy deposit in the keV-MeV range in the dual-phase liquid argon which produces a scintillation signal and an ionisation signal. Together these signals are used to provide powerful pulse shape discrimination allowing separation of nuclear recoils expected from dark matter interactions from background processes faking these signals. This project aims to define and optimise the expected sensitivity of dark matter signals in this experiment through the development of new multivariate data workflows and statistical analysis that incorporate maximal information about the detector and signal/background models. These methods will be performed with reproducibility and the reinterpretation potential of analysed data in mind. The potential for DarkSide-20k to be sensitive to a range of non-standard dark matter interaction models will be studied, and the developed workflows will be optimized to maximize sensitivity across the theoretical model space. To support this effort, the student will develop and improve existing simulations of light emission, transport, and detection in DarkSide from dark matter and radioactive background processes. As part of this work, the student will contribute to the assembly of these cutting-edge prototype detectors, participate in data-taking shifts with the prototype, and subsequently analyse data characterising these sensors toward updating simulations and contributing to the commissioning of sensors for the DarkSide-20k experiment.

DarkSide-20k实验是一项新的实验，旨在通过探测器中来自太空的暗物质粒子在氩核上的弹性散射来探测暗物质。这种相互作用导致双相液态氩在k - mev范围内的能量沉积，产生闪烁信号和电离信号。这些信号一起用于提供强大的脉冲形状识别，从而将暗物质相互作用产生的核反冲与伪造这些信号的背景过程分离开来。该项目旨在通过开发新的多元数据工作流程和统计分析来定义和优化该实验中暗物质信号的预期灵敏度，这些工作流程和统计分析包含有关探测器和信号/背景模型的最大信息。执行这些方法时要考虑到分析数据的再现性和重新解释的可能性。将研究DarkSide-20k对一系列非标准暗物质相互作用模型敏感的潜力，并优化开发的工作流程，以最大化整个理论模型空间的灵敏度。为了支持这项工作，学生将开发和改进现有的光发射、传输和探测模拟，这些模拟来自暗物质和放射性背景过程。作为这项工作的一部分，学生将参与这些尖端原型探测器的组装，参与原型的数据采集，随后分析这些传感器的数据特征，以更新模拟，并为DarkSide-20k实验的传感器调试做出贡献。