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arXiv · 2204.00370

Identifying multichannel coherent couplings and causal relationships in gravitational wave detectors

Piljong Jung·Sang Hoon Oh·Young-Min Kim·Edwin J. Son·Takaaki Yokozawa·Tatsuki Washimi·John J. Oh
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Abstract

The gravitational-wave detector is a complex and sensitive collection of advanced instruments that are impacted not only by mechanical/electronics systems but also by the surrounding environment. Hence, it is of great importance to classify and mitigate noises to detect gravitational-wave signals by using information from many auxiliary channels related to such devices and surroundings. This improves the signal-to-noise ratio and reduces false alarms from coincident loud events. For this reason, it is essential for identifying coherent relationships between complex channels. This study presents a way of identifying (non-) linear couplings between associated channels by using the method of correlation coefficients. And we show that the method can be applied to practical problems in the gravitational-wave detector, such as noises by lightning strokes, air compressors vibrations, and noises caused by wind effects.

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Piljong Jung, Sang Hoon Oh, Young-Min Kim, Edwin J. Son, Takaaki Yokozawa, Tatsuki Washimi, John J. Oh. 2022-04-01. Identifying multichannel coherent couplings and causal relationships in gravitational wave detectors. https://doi.org/10.1103/physrevd.106.042010

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