Reducing scattered light in LIGO’s third observing run
Name
2007.14876.pdf
Description
Accepted version
Size
13.34 MB
Format
Adobe PDF
Checksum (MD5)
b0c419267b0cc0d832c9942cfd8d9823
Author(s)
Mavalvala, Nergis
Date Issued
2021
Journal
Classical and Quantum Gravity
Publisher
IOP Publishing
Citation
Mavalvala, Nergis. 2021. "Reducing scattered light in LIGO’s third observing run." Classical and Quantum Gravity, 38 (2).
Version
Author's final manuscript
Abstract
Noise due to scattered light has been a frequent disturbance in the Advanced
LIGO gravitational wave detectors, hindering the detection of gravitational
waves. The non stationary scatter noise caused by low frequency motion can be
recognized as arches in the time-frequency plane of the gravitational wave
channel. In this paper, we characterize the scattering noise for LIGO's third
observing run O3 from April, 2019 to March, 2020. We find at least two
different populations of scattering noise and we investigate the multiple
origins of one of them as well as its mitigation. We find that relative motion
between two specific surfaces is strongly correlated with the presence of
scattered light and we implement a technique to reduce this motion. We also
present an algorithm using a witness channel to identify the times this noise
can be present in the detector.
MIT Department
LIGO (Observatory : Massachusetts Institute of Technology)
Terms of Use
Attribution-NonCommercial-ShareAlike 4.0 International
Persistent DSpace Link
DOI of Published Version
https://doi.org/10.1088/1361-6382/ABC906
