论文标题
Dune远处检测器的第一个模块的X-Arapuca的检测效率测量和操作测试
Detection efficiency measurement and operational tests of the X-Arapuca for the first module of DUNE Far Detector
论文作者
论文摘要
深地下中微子实验（Dune）是用于长基线中微子振荡研究的双站点实验，能够解决中微子质量层次结构并测量$δ__{CP} $。沙丘还将对超新星中微子和超出标准模型的过程（例如核子衰减搜索）具有敏感性。 FAR检测器（FD）将由四个液体氩TPC（17.5 kt总质量）组成，该系统用于检测电离事件产生的电荷和闪烁光。电荷检测系统允许量热法和位置测定。此外，光子检测系统（PDS）增强了所有沙丘物理驱动因素的检测能力。第一个FD模块的PD由放置在TPC阳极的最内向电线平面之间的光收集器模块组成。在功能上，光收集器，即所谓的X-芳普卡斯，是一个轻度陷阱，可在盒子内部捕获带有高反射性内部表面的波长移位光子，并通过波长转换（WLS）杆将其引导到硅光照射器（SIPM）。在本出版物中报道了将在Protodune-SP II期安装的X-arapucas（FD沙丘原型1:20）以及其绝对检测效率的测量。
The Deep Underground Neutrino Experiment (DUNE) is a dual-site experiment for long-baseline neutrino oscillation studies, able to resolve the neutrino mass hierarchy and measure $δ_{CP}$. DUNE will also have sensitivity to supernova neutrinos and to processes beyond the Standard Model, such as nucleon decay searches. The Far Detector (FD) will consist of four liquid argon TPC (17.5 kt total mass) with systems for the detection of charge and scintillation light produced by an ionization event. The charge detection system permits both calorimetry and position determination. In addition, the photon-detection system (PDS) enhances the detector capabilities for all DUNE physics drivers. The PDS of the first FD module consists of light collector modules placed in the inactive space between the innermost wire planes of the TPC anode. The light collectors, the so-called X-ARAPUCAS, are functionally a light trap that captures wavelength-shifted photons inside boxes with highly reflective internal surfaces where they are guided to Silicon Photo-multipliers (SiPM) by wavelength-shifting (WLS) bars. Functionality and operational tests of the X-ARAPUCAS to be installed in ProtoDUNE-SP phase II (FD DUNE prototype at the scale 1:20), as well as the measurement of their absolute detection efficiency is reported in this publication.
