Reducing scattered light in LIGO's third observing run

Soni, S., Austin, C., Effler, A., Schofield, R. M. S., González, G., Frolov, V. V., Driggers, J. C., Pele, A., Urban, A. L., Valdes, G., Abbott, R., Adams, C., Adhikari, R. X., Ananyeva, A., Appert, S., Arai, K., Areeda, J. S., Asali, Y., Aston, S. M., Baer, A. M., Ball, M., Ballmer, S. W., Banagiri, S., Barker, D., Barsotti, L., Bartlett, J., Berger, B. K., Betzwieser, J., Bhattacharjee, D., Billingsley, G., Biscans, S., Blair, C. D., Blair, R. M., Bode, N., Booker, P., Bork, R., Bramley, A., Brooks, A. F., Brown, D. D., Buikema, A., Cahillane, C., Cannon, K. C., Chen, X., Ciobanu, A. A., Clara, F., Cooper, S. J., Corley, K. R., Countryman, S. T., Covas, P. B., Coyne, D. C., Datrier, L. E. H., Davis, D., Fronzo, C. Di, Dooley, K. L., Dupej, P., Dwyer, S. E., Etzel, T., Evans, M., Evans, T. M., Feicht, J., Fernandez-Galiana, A., Fritschel, P., Fulda, P., Fyffe, M., Giaime, J. A., Giardina, K. D., Godwin, P., Goetz, E., Gras, S., Gray, C., Gray, R., Green, A. C., Gustafson, E. K., Gustafson, R., Hanks, J., Hanson, J., Hardwick, T., Hasskew, R. K., Heintze, M. C., Helmling-Cornell, A. F., Holland, N. A., Jones, J. D., Kandhasamy, S., Karki, S., Kasprzack, M., Kawabe, K., Kijbunchoo, N., King, P. J., Kissel, J. S., Kumar, Rahul, Landry, M., Lane, B. B., Lantz, B., Laxen, M., Lecoeuche, Y. K., Leviton, J., Liu, J., Lormand, M., Lundgren, A .P., Macas, R., MacInnis, M., Macleod, D. M. ORCID: https://orcid.org/0000-0002-1395-8694, Mansell, G. L., Márka, S., Márka, Z., Martynov, D. V., Mason, K., Massinger, T. J., Matichard, F., Mavalvala, N., McCarthy, R., McClelland, D. E., McCormick, S., McCuller, L., McIver, J., McRae, T., Mendell, G., Merfeld, K., Merilh, E. L., Meylahn, F., Mistry, T., Mittleman, R., Moreno, G., Mow-Lowry, C. M., Mozzon, S., Mullavey, A., Nelson, T. J. N., Nguyen, P., Nuttall, L. K., Oberling, J., Oram, Richard J., Osthelder, C., Ottaway, D. J., Overmier, H., Palamos, J. R., Parker, W., Payne, E., Penhorwood, R., Perez, C. J., Pirello, M., Radkins, H., Ramirez, K. E., Richardson, J. W., Riles, K., Robertson, N. A., Rollins, J. G., Romel, C. L., Romie, J. H., Ross, M. P., Ryan, K., Sadecki, T., Sanchez, E. J., Sanchez, L. E., Saravanan, T. R., Savage, R. L., Schaetzl, D., Schnabel, R., Schwartz, E., Sellers, D., Shaffer, T., Sigg, D., Slagmolen, B. J. J., Smith, J. R., Sorazu, B., Spencer, A. P., Strain, K. A., Sun, L., Szczepa?czyk, M. J., Thomas, M., Thomas, P., Thorne, K. A., Toland, K., Torrie, C. I., Traylor, G., Tse, M., Vajente, G., Vander-Hyde, D. C., Veitch, P. J., Venkateswara, K., Venugopalan, G., Viets, A. D., Vo, T., Vorvick, C., Wade, M., Ward, R. L., Warner, J., Weaver, B., Weiss, R., Whittle, C., Willke, B., Wipf, C. C., Xiao, L., Yamamoto, H., Yu, Hang, Yu, Haocun, Zhang, L., Zucker, M. E. and Zweizig, J. 2021. Reducing scattered light in LIGO's third observing run. Classical and Quantum Gravity 38 (2) , 025016. 10.1088/1361-6382/abc906

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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 and Virgo'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.

Item Type:	Article
Date Type:	Publication
Status:	Published
Schools:	Physics and Astronomy
Publisher:	IOP Publishing
ISSN:	0264-9381
Date of First Compliant Deposit:	27 July 2021
Date of Acceptance:	10 November 2020
Last Modified:	09 Nov 2022 11:22
URI:	https://orca.cardiff.ac.uk/id/eprint/142931

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