The effect of time on optical coating mechanical loss and implications for LIGO-India
The effect of time on optical coating mechanical loss and implications for LIGO-India
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时间对光学镀膜机械损耗的影响及其对 LIGO-India 的影响
DOI：
10.1088/0264-9381/33/14/147001
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发表时间：
2016
影响因子：
3.5
通讯作者：
S. Penn
中科院分区：
文献类型：
--
作者：
M. Kinley;H. Fair;Isaac Jiffar;Jonathan Newport;L. Gitelman;G. Harry;G. Billingsley;S. Penn
我们报道了由Ta2O5和SiO_2交替沉积在熔融石英衬底上的离子束溅射介质涂层的机械损耗随时间的持续。在此基础上，对镀膜光学元件存放多年后在引力波干涉仪中的热噪声进行了预测。我们在2015年测量了两个涂层熔融二氧化硅样品的模态机械品质因数Q。这些样本也在2002年进行了模式Q的测量。我们的结论是，将涂覆的二氧化硅磁盘储存13年不会改变它们的机械损耗，因此，存储先进的LIGO引力波探测器光学器件，直到它们未来安装在印度时，不会降低其可实现的热噪声。
We report on the persistence of mechanical loss with time of ion beam sputtered dielectric coatings made from alternating layers of Ta2O5 and SiO2 deposited onto fused silica substrates. From this, we predict the coating thermal noise in gravitational wave interferometers, after the coated optics have been stored for years. We measured the modal mechanical quality factor, Q, of two coated fused silica samples in 2015. These samples also had their modal Q's measured in 2002. We conclude that storing the coated silica disks for 13 years does not change their mechanical loss and thus the storage of Advanced LIGO gravitational wave detector optics until their future installation in India will not degrade their achievable thermal noise.