论文标题
在圆柱检测器上涂层$ $ $ m tpb，并研究被冷却至LN和LHE温度的样品膜
Coating $μ$m TPB on a cylindrical detector and studying the sample films being cooled to LN and LHe temperatures
论文作者
论文摘要
Aletheia是一个新成立的暗物质直接检测项目，旨在寻找低质量的烟灰质。 TPB在液态氦气和氩实验中广泛实现，以将VUV光子转移到可见光。我们首先报告说，我们已经成功地覆盖了10厘米圆柱PTFE检测器的内壁上的$ \ sim 3〜μ $ m tpb；我们将涂层过程分为两个步骤，使所有表面都具有相同的厚度涂层。应用了三种独立的方法来找出TPB涂层层的厚度，并获得了一致的结果。其次，使用SEM机器，我们扫描了暴露于不同低温温度的TPB涂料样品膜的表面。将第一组样品层浸入液氮露水中四十小时，将第二组样品冷却至4.5 K，持续三个小时，第三组在涂层后保持在室温下。样品膜的SEM扫描图像几乎没有显示出任何明显的差异。
ALETHEIA is a newly established dark matter direct detection project that aims at hunting for low-mass WIMPs. TPB is widely implemented in liquid helium and argon experiments to shift VUV photons to visible light. We first report that we have successfully coated $\sim 3 ~μ$m TPB on the inner walls of a 10-cm cylindrical PTFE detector; we split the coating process into two steps to have all of the surfaces being coated with the same thickness; three independent methods were applied to figure out the thickness of the TPB coating layers, and consistent results were obtained. Second, with an SEM machine, we scanned the surface of TPB coating sample films exposed to different cryogenic temperatures. The first group of sample layers were immersed into a liquid nitrogen dewar for forty hours, the second group samples were cooled to 4.5 K for three hours, and the third group stayed at room temperature after coating. The SEM-scanned images of the sample films barely show any noticeable difference.
