聚萘二甲酸乙二醇酯膜在液氩探测器中的波长移动
Polyethylene naphthalate film as a wavelength shifter in liquid argon detectors
摘要：
液氩闪烁探测器对于暗物质的研究和中微子物理学的研究具有重要意义。氩闪烁光处于真空紫外区，很难用常规方法探测到。聚萘二甲酸乙二醇酯（PEN）是一种光学透明的热塑性聚酯，可作为大面积片材或卷商购获得，被提出作为常用的四苯基丁二烯（TPB）的替代波长移位器。通过结合现有的文献数据和光谱仪测量相对于TPB，我们得出结论，这两种材料的荧光产率和时间可能非常接近。所收集的证据表明PEN是液氩中微子探测器中TPB的合适替代物，也是暗物质探测器的有希望的候选者。PEN的优点进行了讨论的背景下，按比例放大现有技术的下一代非常大的吨级探测器。它的简单性有可能促进这种规模的扩大，彻底改变该领域。
英文摘要：
Liquid argon-based scintillation detectors are important for dark matter searches and neutrino physics. Argon scintillation light is in the vacuum ultraviolet region, making it hard to be detected by conventional means. Polyethylene naphthalate (PEN), an optically transparent thermoplastic polyester commercially available as large area sheets or rolls, is proposed as an alternative wavelength shifter to the commonly-used tetraphenyl butadiene (TPB). By combining the existing literature data and spectrometer measurements relative to TPB, we conclude that the fluorescence yield and timing of both materials may be very close. The evidence collected suggests that PEN is a suitable replacement for TPB in liquid argon neutrino detectors, and is also a promising candidate for dark matter detectors. Advantages of PEN are discussed in the context of scaling-up existing technologies to the next generation of very large ktonne-scale detectors. Its simplicity has a potential to facilitate such scale-ups, revolutionizing the field.
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