引力波探测器千米级束管臂杂散光噪声建模的首次实验评估
First Experimental Evaluation of Stray Light Noise Modeling of kilometers-long Beam Tube Arms of Gravitational Wave Detectors
- School of Physics and Astronomy, University of Birmingham（伯明翰大学物理与天文学院）
- LIGO Lab, California Institute of Technology（加州理工学院LIGO实验室）
- Institute of Science Tokyo（东京科学大学）
- Physics Program, Bard College（巴德学院物理项目）
机构由 AI 辅助整理，请以论文原文为准。
AI总结：
本文首次实验评估了LIGO千米级束管挡板杂散光噪声模型，结合测试与SIS模拟，在3-10倍因子内吻合实测应变，识别出35Hz和90Hz宽带特征及70-100Hz衍射噪声峰值。
AI中文摘要：
我们展示了LIGO束管挡板杂散光噪声模型首次实验评估的结果。我们将LIGO利文斯顿的测试活动结果与SIS模拟相结合，得到了选定臂中部挡板的背散射和衍射噪声模型。模型与实测引力波应变之间的一致性在3至10倍因子范围内。识别出两个传播良好的运动区域，分别约为35Hz和90Hz，这些区域在应变信号中表现为宽带特征。在70Hz至100Hz之间的应变信号中还发现了Q值约为100至1000的峰值。理论上这些峰值仅来自衍射噪声，并使用从应变中测得的Q因子进行建模。这些模型也与应变信号吻合良好。此外，还讨论了辅助臂系统对杂散光噪声影响的其他发现。
英文摘要：
We present the results of the first experimental evaluation of stray light noise models for LIGO beam tube baffles. We combine the results of a testing campaign at LIGO Livingston and SIS simulations to get a model of backscatter and diffraction noise of select mid-arm baffles. Agreement to within a factor of $3-10$ is found between models and measured gravitational waHe strain. Two distinct regions of well-propagating motion were identified, at approximately $35Hz$ and $90Hz$, and these are visible in the strain signal as broadband features. Peaks with $Q \approx 100-1000$ were also found in the strain signal between $70Hz$ and$100Hz$. These are theorized to come from diffraction noise only, and are modeled using Q-factors measured from the strain. These models are also in good agreement with the strain signal. Other findings on the effect of auxiliary arm systems on stray light noise are discussed.
