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arXiv 2102.04244astro-ph.IMphysics.geo-phphysics.ins-det
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时空谱分析在引力波干涉仪地震波检测中的应用

Application of space-time spectral analysis for detection of seismic waves in gravitational-wave interferometer

Robert Szymko, Mateusz Denys, Tomasz Bulik, Bartosz Idźkowski, Adam Kutynia, Krzysztof Nikliborc, Maciej Suchiński

摘要:

混合时空谱分析被应用于探测通过Virgo干涉仪西端大楼的地震波。该方法能够检测每一个通过的波,包括其频率、长度、方向和幅度。对38个地震传感器在2018年1月24日至2月6日为期两周的测量期间收集的数据进行了全面分析,旨在提高Virgo探测器的灵敏度,频率范围为5- 20 Hz。发现了两个主要的地震波频率:5.5 Hz和17.1 Hz。确定了这些波的可能来源,即附近的工业综合体的频率为5.5 Hz,距离西端大厦100 m处的小物体的频率为17.1 Hz。所得到的结果将被用来提供更好的估计附近的Virgo干涉仪的牛顿噪声。

英文摘要:

Mixed space-time spectral analysis was applied for the detection of seismic waves passing through the west-end building of the Virgo interferometer. The method enables detection of every single passing wave, including its frequency, length, direction, and amplitude. A thorough analysis aimed to improving sensitivity of the Virgo detector was made for the data gathered by 38 seismic sensors, in the two-week measurement period, from 24 January to 6 February 2018, and for frequency range 5--20 Hz. Two dominant seismic-wave frequencies were found: 5.5 Hz and 17.1 Hz. The possible sources of these waves were identified, that is, the nearby industrial complex for the frequency 5.5 Hz and a small object 100 m away from the west-end buiding for 17.1 Hz. The obtained results are going to be used to provide better estimation of the newtonian noise near the Virgo interferometer.

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