Intrinsic losses in various kinds of fused silica
Intrinsic losses in various kinds of fused silica
复制标题
各种熔融石英的固有损耗
DOI：
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发表时间：
2002
期刊：
影响因子：
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通讯作者：
K. Tsubono
中科院分区：
文献类型：
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作者：
K. Numata;S. Otsuka;M. Ando;K. Tsubono
采用节点支撑系统系统地测量了四家公司13种块状熔融二氧化硅的内在机械质量因子。其中一些实际上已被用作干涉引力波探测器的反射基板。测定的质量因子范围为7 × 105 ~ 4 × 107。结果证明，它们与一种特定的性质无关，比如OH含量的多少，这表明这种损失机制有几个起源。我们发现许多样本在较低的频率下显示出较小的损失。从镜面热噪声的角度来看，损耗随频率的降低而持续减小是一件幸事。我们还发现退火工艺提高了它们的质量因子。
We systematically measured the intrinsic mechanical quality factors of 13 kinds of bulk fused silica from four companies using a nodal support system. Some of them have actually been adopted as mirror substrates in interferometric gravitational wave detectors. The measured quality factors widely ranged from 7 × 105 to 4 × 107. They turned out to be independent of one specific property, such as the amount of OH content, suggesting that the loss mechanism has several origins. We found that many of the samples showed smaller losses at lower frequency. From the viewpoint of the mirror thermal noise, it would be fortunate if the loss continued to decrease with decreasing frequency. We also found that an annealing process increases their quality factors.