Reduction of Thermal Fluctuations in a Cryogenic Laser Interferometric Gravitational Wave Detector
Reduction of Thermal Fluctuations in a Cryogenic Laser Interferometric Gravitational Wave Detector
复制标题
低温激光干涉引力波探测器中热波动的减少
DOI：
10.1103/physrevlett.108.141101
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发表时间：
2012
影响因子：
8.6
通讯作者：
et al.
中科院分区：
文献类型：
--
作者：
T.Uchiyama;et al.
镜面的热起伏是干涉型引力波探测器的基本限制。在这里，我们实验证明了第一次减少在GW检测器与蓝宝石镜从低温激光干涉仪天文台在17和18 K的反射镜的热波动。在90 ~ 240 Hz的频率范围内，通过对反射镜进行冷却，提高了受反射镜在室温下热涨落影响的探测器灵敏度。在165 Hz处灵敏度达到最大值。
The thermal fluctuation of mirror surfaces is the fundamental limitation for interferometric gravitational wave (GW) detectors. Here, we experimentally demonstrate for the first time a reduction in a mirror’s thermal fluctuation in a GW detector with sapphire mirrors from the Cryogenic Laser Interferometer Observatory at 17 and 18 K. The detector sensitivity, which was limited by the mirror’s thermal fluctuation at room temperature, was improved in the frequency range of 90 to 240 Hz by cooling the mirrors. The improved sensitivity reached a maximum ofat 165 Hz.