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Gravitational-wave Physics with Cosmic Explorer: Limits to Low-Frequency Sensitivity

Physical Review D(2021)SCI 2区

MIT | Calif State Univ Fullerton | CALTECH | Syracuse Univ | Gran Sasso Sci Inst GSSI | Univ Calif Santa Cruz | Australian Natl Univ

Cited 54|Views69
Abstract
Cosmic Explorer (CE) is a next-generation ground-based gravitational-wave observatory concept, envisioned to begin operation in the 2030s, and expected to be capable of observing binary neutron star and black hole mergers back to the time of the first stars. Cosmic Explorer's sensitive band will extend below 10 Hz, where the design is predominantly limited by geophysical and thermal noises. In this work, thermal, seismic, gravity-gradient, servo-control, and scattered-light noises are analyzed in order to motivate facility design requirements, potential test mass suspensions, Newtonian noise reduction strategies, improved inertial sensors, and cryogenic control requirements. Our analysis shows that with improved technologies, Cosmic Explorer can deliver a strain sensitivity better than $10^{-23}/\mathrm{Hz}^{1/2}$ down to 5 Hz. Our work refines and extends previous analysis of the Cosmic Explorer concept and outlines the key research areas needed to make this observatory a reality.
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要点】:本文研究了下一代地面引力波观测站Cosmic Explorer的低频灵敏度限制,提出通过技术改进实现更好的应变灵敏度,为引力波物理研究提供新的可能。

方法】:文章通过分析热噪声、地震噪声、重力梯度噪声、伺服控制噪声和散射光噪声,提出了优化设施设计、测试质量悬挂、牛顿噪声降低策略、改进惯性传感器和低温控制要求的方法。

实验】:研究基于理论分析和模拟,未具体提及实验操作,使用的为理论模型和假定的数据集,得出Cosmic Explorer在5 Hz下的应变灵敏度可优于$10^{-23}/\mathrm{Hz}^{1/2}$的结论。