The X-ARAPUCA is a device for the detection of scintillation light in liquid argon and represents an evolution of the ARAPUCA design, with an increased collection efficiency and a simpler design. The first liquid argon test of an X-ARAPUCA prototype has been performed in the cryogenic facility of the Laboratáorio de Léptons da UNCIAMP and showed a detection efficiency of 3.5%± 0.5%, in line with the expectations from Monte Carlo simulations and extrapolations from measurements with standard ARAPUCAs.

中文翻译：

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X-ARAPUCA的首次液氩测试

X-ARAPUCA是用于检测液态氩中闪烁光的设备，代表了ARAPUCA设计的发展，具有更高的收集效率和更简单的设计。X-ARAPUCA原型的首次液体氩气测试已在UNCIAMP的LaboratáoriodeLéptons实验室的低温设施中进行，检测效率为3.5％±0.5％，与蒙特卡洛模拟和测量的推断相符使用标准ARAPUCA。