Ground-based low-frequency gravitational-wave detector with multiple outputs
Ground-based low-frequency gravitational-wave detector with multiple outputs
复制标题
多输出地基低频引力波探测器
DOI：
10.1103/physrevd.95.082004
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发表时间：
2017
期刊：
影响因子：
--
通讯作者：
and Yousuke Itoh
中科院分区：
文献类型：
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作者：
Ayaka Shoda;Yuya Kuwahara;Masaki Ando;Kazunari Eda;Kodai Tejima;Yoichi Aso;and Yousuke Itoh
我们开发了一种新型引力波（GW）探测器——扭杆天线（TOBA），它具有多输出配置。 TOBA 是一种带有棒状测试质量的探测器，这些测试质量通过引力波的潮汐力而旋转。在我们的探测器中，可以通过监测多个旋转自由度（即条的水平旋转和垂直旋转）从 GW 导出三个独立信号。由于三个输出具有不同的天线方向图函数，多输出系统提高了检测率和参数估计精度。这对于获取有关 GW 源的更多详细信息（例如人口和方向）非常有用。我们成功连续运行多输出检测器超过 24 小时，数据质量稳定。通过被动和主动隔振系统的组合，其中一个信号中的 GW 等效应变噪声已降低至 3 Hz，而对垂直旋转产生的可能 GW 信号的灵敏度比水平旋转差。
We have developed a new gravitational-wave (GW) detector, TOrsion-Bar Antenna (TOBA), which has a multiple-output configuration. TOBA is a detector with bar-shaped test masses that are rotated by the tidal force of the GWs. In our detector, three independent signals can be derived from the GW by monitoring multiple rotational degrees of freedom, i.e., the horizontal rotations and vertical rotations of the bars. Since the three outputs have different antenna pattern functions, the multioutput system improves the detection rate and the parameter estimation accuracy. This is useful for obtaining further details about the GW sources, such as population and directions. We successfully operated the multioutput detector continuously for more than 24 hours with stable data quality. The GW equivalent strain noise in one of the signals has been reduced toat 3 Hz by a combination of passive and active vibration isolation systems, while the sensitivities to possible GW signals derived from the vertical rotations are worse than that from the horizontal rotation.