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.
@article{arxiv.2204.00370,
title = {Identifying multichannel coherent couplings and causal relationships in gravitational wave detectors},
author = {Piljong Jung and Sang Hoon Oh and Young-Min Kim and Edwin J. Son and Takaaki Yokozawa and Tatsuki Washimi and John J. Oh},
journal= {arXiv preprint arXiv:2204.00370},
year = {2022}
}
Comments
Accepted version in PRD and title changed, 11 pages, 8 figures, and 2 tables,