Optical scattering measurements and implications on thermal noise in Gravitational Wave detectors test-mass coatings
Optical scattering measurements and implications on thermal noise in Gravitational Wave detectors test-mass coatings
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DOI：
10.1016/j.physleta.2017.05.050
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发表时间：
2018-08-25
影响因子：
2.6
通讯作者：
Fajardo, Cameron
中科院分区：
文献类型：
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作者：
Glover, Lamar;Goff, Michael;Fajardo, Cameron
LIGO引力波探测器反射镜的照片被驻波束照亮，用一种天文软件工具进行分析，该软件工具旨在识别图像中的恒星，它提取了均匀分布在镜面上的数十万个点状散射体，这些散射体可能分布在涂层的深度。所观察到的散射体的绝对数量意味着在沉积或加工过程中的基本热力学起源。这些散射体是V.Braginsky和Y.莱文，这限制了天文台对引力波的灵敏度。这项研究可能会指向生产的镜子，减少热噪声和增加检测范围的方式。（C）2017 Elsevier B.V.保留所有权利。
Photographs of the LIGO Gravitational Wave detector mirrors illuminated by the standing beam were analyzed with an astronomical software tool designed to identify stars within images, which extracted hundreds of thousands of point-like scatterers uniformly distributed across the mirror surface, likely distributed through the depth of the coating layers. The sheer number of the observed scatterers implies a fundamental, thermodynamic origin during deposition or processing. These scatterers are a possible source of the mirror dissipation and thermal noise foreseen by V. Braginsky and Y. Levin, which limits the sensitivity of observatories to Gravitational Waves. This study may point the way towards the production of mirrors with reduced thermal noise and an increased detection range. (C)2017 Elsevier B.V. All rights reserved.