科学驱动的宇宙探测器可调谐设计
Science-Driven Tunable Design of Cosmic Explorer Detectors
摘要：
像宇宙探测器这样的地面引力波探测器可以通过调整信号提取腔的响应来提高它们在高频或低频的灵敏度。提高2 kHz以上的灵敏度，使合并后的引力波谱的测量从二进制中子星合并，这严重依赖于未知的状态方程的热，超密度物质。提高灵敏度低于500赫兹有利于精确测试的极端重力与黑洞振铃信号，并提高了检测的前景，同时有利于改善测量的源属性紧凑的二进制inspirals在宇宙学的距离。在中频，更灵敏的探测器可以更好地测量中子星的潮汐性质。我们提出并表征了调谐宇宙探测器配置的性能，这些配置旨在优化不同天体物理源人群的检测。这些调整选项使Cosmic Explorer能够灵活地使用相同的探测器基础设施来实现各种科学目标。我们发现，一个40公里的宇宙探测器在所有关键科学目标上都优于20公里的探测器，除了获得合并后的物理学。这表明宇宙探索者号应该至少包括一个40公里的设施。
英文摘要：
Ground-based gravitational-wave detectors like Cosmic Explorer can be tuned to improve their sensitivity at high or low frequencies by tuning the response of the signal extraction cavity. Enhanced sensitivity above 2 kHz enables measurements of the post-merger gravitational-wave spectrum from binary neutron star mergers, which depends critically on the unknown equation of state of hot, ultra-dense matter. Improved sensitivity below 500 Hz favors precision tests of extreme gravity with black hole ringdown signals and improves the detection prospects while facilitating an improved measurement of source properties for compact binary inspirals at cosmological distances. At intermediate frequencies, a more sensitive detector can better measure the tidal properties of neutron stars. We present and characterize the performance of tuned Cosmic Explorer configurations that are designed to optimize detections across different astrophysical source populations. These tuning options give Cosmic Explorer the flexibility to target a diverse set of science goals with the same detector infrastructure. We find that a 40 km Cosmic Explorer detector outperforms a 20 km in all key science goals other than access to post-merger physics. This suggests that Cosmic Explorer should include at least one 40 km facility.
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