The photon detection system of the far detector of the Deep Underground Neutrino Experiment (DUNE) will collect liquid argon scintillation photons with an array of modules whose working principle is based on the ARAPUCA technology. These devices acting as light traps are able to convert VUV scintillation photons into visible ones and capture them inside a reflective cavity observed by an array of SiPMs as active photo-sensitive elements. The use of wavelength shifting techniques in light collecting systems for particle detection in liquid argon is of fundamental importance, since the scintillation photon wavelength is around 127 nm of the photon produced which is extremely challenging to be directly detected. The main objective of the present work was to explore and characterize different substrates, wavelength shifting compounds and deposition methods to optimize and improve the light collection of the ARAPUCA device.

中文翻译：

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用于 ARAPUCA to DUNE 实验的 WLS 的研究和表征

深地下中微子实验（DUNE）远探测器的光子探测系统将通过一系列模块收集液氩闪烁光子，其工作原理基于ARAPUCA技术。这些充当光阱的器件能够将 VUV 闪烁光子转换为可见光子，并将它们捕获在反射腔内，由作为有源光敏元件的 SiPM 阵列观察到。在光收集系统中使用波长漂移技术对液氩中的粒子进行检测具有重要意义，因为闪烁光子波长约为所产生光子的 127 nm，这对于直接检测极具挑战性。目前工作的主要目标是探索和表征不同的底物，