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arXiv 2202.12841gr-qc
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爱因斯坦望远镜牛顿噪声模型的下限

A lower limit for Newtonian-noise models of the Einstein Telescope

INFN, Laboratori Nazionali del Sud(意大利国家核物理研究所,南方实验室)

Jan Harms, Luca Naticchioni, Enrico Calloni, Rosario De Rosa, Fulvio Ricci, Domenico D'Urso

AI总结:

本文推导了地震牛顿噪声谱的下限,并应用于评估爱因斯坦望远镜候选站点的噪声模型准确性,发现EMR站点的预测存在不一致性。

摘要:

爱因斯坦望远镜(ET)是拟议的第三代引力波(GW)地下观测站。与当前的引力波探测器相比,其灵敏度将大大提高,并且设计将观测频带扩展到几赫兹。在这些频率下,ET灵敏度的主要限制预计来自环境产生的引力波动,最重要的是地震场,这引起了所谓的牛顿噪声(NN)。准确的ET NN模型对于评估ET候选站点与ET灵敏度目标的兼容性至关重要,同时还要考虑通过噪声消除可能减少NN。随着NN模型变得越来越复杂,包括地质和地形的细节,拥有能够稳健评估其准确性的工具至关重要。为此,我们推导了地震NN谱的下限,该下限对地质和地震场性质依赖较弱。作为首次应用,我们使用该下限与最近为撒丁岛和默兹-莱茵河地区(EMR)候选站点计算的NN估计值进行比较。我们发现该方法很有用,它显示了与EMR站点预测的不一致性,这表明ET NN模型需要进一步改进。

英文摘要:

The Einstein Telescope (ET) is a proposed third-generation gravitational-wave (GW) underground observatory. It will have greatly increased sensitivity compared to current GW detectors, and it is designed to extend the observation band down to a few Hz. At these frequencies, a major limitation of the ET sensitivity is predicted to be due to gravitational fluctuations produced by the environment, most importantly by the seismic field, which give rise to the so-called Newtonian noise (NN). Accurate models of ET NN are crucial to assess the compatibility of an ET candidate site with the ET sensitivity target also considering a possible reduction of NN by noise cancellation. With NN models becoming increasingly complex as they include details of geology and topography, it is crucial to have tools to make robust assessments of their accuracy. For this purpose, we derive a lower bound on seismic NN spectra, which is weakly dependent on geology and properties of the seismic field. As a first application, we use the lower limit to compare it with NN estimates recently calculated for the Sardinia and Euregio Meuse-Rhine (EMR) candidate sites. We find the utility of the method, which shows an inconsistency with the predictions for the EMR site, which indicates that ET NN models require further improvement.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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