Virgo引力波探测器中声学起源的牛顿噪声建模
Modeling Newtonian noise of acoustic origin in the Virgo gravitational wave detector
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中文总结 AI 辅助
本研究针对限制Virgo引力波探测器低频灵敏度的声学起源牛顿噪声，采用原创数值声学模型量化该噪声，方法可扩展至未来探测器以指导相关区域设计。
中文摘要 AI 辅助
自2015年9月14日首次探测到引力波（GW）以来，LIGO-Virgo-KAGRA网络已识别出数百个引力波源，引力波在天体物理学和基础物理学领域取得了诸多重要成果。随着计划中的新数据采集，现有探测器将得到升级，而Einstein Telescope、Cosmic Explorer等新项目也在研究中。在限制低频灵敏度的噪声中，振动声学噪声尤为重要。本研究聚焦于声学起源的重力梯度噪声（又称牛顿噪声），该噪声指探测器实验区域内声场产生的引力场微小波动。当压力场由空调系统激发时，本研究采用实验房间的详细数值声学模型，以原创方式量化该诱导噪声。该方法已应用于Virgo探测器，且可轻松扩展至未来探测器，用于指导地下洞穴及实验区域的设计。
英文摘要
Since the first gravitational-wave (GW) detection of September 14th 2015 and with hundreds of gravitational-wave sources identified by the LIGO-Virgo-KAGRA network, GW have produced many important results in astrophysics and fundamental physics. Along with planned new data takings, current detectors will be upgraded and new project, such as Einstein Telescope and Cosmic Explorer, are under study. Among noises limiting low frequency sensitivity, vibro-acoustic noises are particularly important. In this work, we focus on the gravity gradient noise (also called Newtonian noise) of acoustic origin, which refers to the small fluctuations in the gravity field resulting from the acoustic pressure field present in the experimental areas of the detector. The induced noise is quantified in an original way, using a detailed nu- merical acoustic model of the experimental room, when the pressure field is excited by the air conditioning system. The method is used for Virgo, but it can be easily extended for future detectors and used to guide the design of caverns and experimental areas.
