The Deep Underground Neutrino Experiment (DUNE) is a long-baseline project studying an accelerator-made neutrino beam produced at Fermilab. DUNE consists of two detectors placed in the path of the neutrino beam, one near the source and one at the Stanford Underground Research Facility, at a distance of 1300 km and protected by a 1500 m rock overburden. Fundamental features of neutrino oscillation physics, such as leptonic CP violation and the neutrino mass hierarchy, as well as supernovae and proton decay physics will be studied with high precision during more than 10 years of data taking, starting in 2026. The far detector technology consists of four 60 × 12 × 12 m3 time-projecting chambers (TPC), each module having 10 kT of liquid argon (LAr) fiducial mass. Two designs are currently under study for the far detector: one with only liquid argon (Single-Phase), the other containing a small volume of gaseous argon at the top of the active volume (Dual-Phase). Both designs are currently being tested with 6 × 6 × 6 m3 prototypes at CERN. Regarding Dual-Phase, all aspects of the detectors have the same size as those for the final far detector except for the drift length (6 m against 12 m). This paper focuses on the way we collect and analyze the ionization signal in the Dual-Phase prototype (ProtoDUNE-DP).

中文翻译：

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DUNE 双相液氩 TPC

深地下中微子实验 (DUNE) 是一个长基线项目，研究费米实验室产生的加速器制造的中微子束。DUNE 由两个放置在中微子束路径上的探测器组成，一个靠近源，一个在斯坦福地下研究设施，距离 1300 公里，并受到 1500 米岩石覆盖层的保护。从 2026 年开始，将在 10 多年的数据采集中高精度地研究中微子振荡物理学的基本特征，例如轻子 CP 破坏和中微子质量等级，以及超新星和质子衰变物理学。 远探测器技术包括四个 60 × 12 × 12 m3 时间投影室 (TPC)，每个模块具有 10 kT 的液氩 (LAr) 基准质量。目前正在研究用于远探测器的两种设计：一个只有液态氩（单相），另一个在活动体积的顶部含有少量气态氩（双相）。这两种设计目前都在 CERN 用 6 × 6 × 6 m3 原型进行测试。关于双相，除了漂移长度（6 m 对 12 m）外，探测器的所有方面都与最终远探测器的尺寸相同。本文重点介绍我们在双相原型 (ProtoDUNE-DP) 中收集和分析电离信号的方式。