D. D’Ubaldo, M. Sbroscia, V. C. Ficca, E. Stellino, A. Pasqualetti, D. Sentenac, J. Gargiulo, L. Francescon, L. Pinard, E. Placidi
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引用次数: 0
摘要
本文介绍了对引力波干涉测量中常用的涂有二氧化硅/钽的无定形二氧化硅反射镜性能退化的研究。主要目的是了解导致性能下降的因素,特别是在真空中长期使用反射镜后观察到的噪声增大。本文通过 X 射线光发射光谱显微镜、原子力显微镜和拉曼光谱,对 SiO2/Ta2O5 多层镀膜样品反射镜暴露于污染真空环境前后的情况进行了分析。我们的研究结果表明,反射镜性能的下降与二氧化硅结构中污染物碳和缺陷群的激增之间可能存在关联。
Study of defects population and contaminations in silica/tantala coated mirrors
This article presents a study on the performance degradation of amorphous silica mirrors coated with silica/tantala, commonly utilized in gravitational wave interferometry measurements. The primary objective is to understand the factors contributing to the reduced performance, specifically the heightened noise observed after prolonged use of the mirrors in a vacuum. In this article, SiO2/Ta2O5 multilayered coated sample mirrors underwent analysis through x-ray photoemission spectro-microscopy, atomic force microscopy, and Raman spectroscopy, before and after exposure to a contaminating vacuum environment. Our findings revealed the possible correlation between the deterioration in mirror performance and an upsurge in contaminant carbon and defect populations within the silicon dioxide structure.