Gravitational-wave physics with Cosmic Explorer: Limits to low-frequency sensitivity
Gravitational-wave physics with Cosmic Explorer: Limits to low-frequency sensitivity
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DOI：
10.1103/physrevd.103.122004
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发表时间：
2021-06-21
影响因子：
5
通讯作者：
Yamamoto, Hiro
中科院分区：
文献类型：
--
作者：
Hall, Evan D.;Kuns, Kevin;Yamamoto, Hiro
宇宙探索者号是下一代地面引力波观测站概念，预计于 2030 年代开始运行，预计能够观测到第一批恒星时代的双中子星和黑洞合并。 Cosmic Explorer 的敏感频段将延伸到 10 Hz 以下，该频段的设计主要受到地球物理、热和量子噪声的限制。在这项工作中，分析了热噪声、地震噪声、重力梯度噪声、量子噪声、残余气体噪声、散射光噪声和伺服控制噪声，以激发设施和真空系统设计要求、潜在的测试质量悬架、牛顿降噪策略、改进的惯性传感器和低温控制要求。我们的分析表明，通过改进技术，Cosmic Explorer 可以提供优于 10(-23) Hz(-1/2) 至 5 Hz 的应变灵敏度。我们的工作完善并扩展了之前对宇宙探索者概念的分析，并概述了使该天文台成为现实所需的关键研究领域。
Cosmic Explorer 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, thermal, and quantum noises. In this work, thermal, seismic, gravity-gradient, quantum, residual gas, scattered-light, and servo-control noises are analyzed in order to motivate facility and vacuum system 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) 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.