Sensitivity and performance of the Advanced LIGO detectors in the third observing run

Buikema, A., Cahillane, C., Mansell, G. L., Blair, C. D., Abbott, R., Adams, C., Adhikari, R. X., Ananyeva, A., Appert, S., Arai, K., Areeda, J. S., Asali, Y., Aston, S. M., Austin, C., 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, R. M., Bode, N., Booker, P., Bork, R., Bramley, A., Brooks, A. F., Brown, D. D., 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., Di Fronzo, C., Dooley, K. L. ORCID: https://orcid.org/0000-0002-1636-0233, Driggers, J. C., Dupej, P., Dwyer, S. E., Effler, A., Etzel, T., Evans, M., Evans, T. M., Feicht, J., Fernandez-Galiana, A., Fritschel, P., Frolov, V. V., 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, 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., O'Reilly, B., Osthelder, C., Ottaway, D. J., Overmier, H., Palamos, J. R., Parker, W., Payne, E., Pele, A., 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., Schofield, R. M. S., Schwartz, E., Sellers, D., Shaffer, T., Sigg, D., Slagmolen, B. J. J., Smith, J. R., Soni, S., Sorazu, B., Spencer, A. P., Strain, K. A., Sun, L., Szczepaczyk, M. J., Thomas, M., Thomas, P., Thorne, K. A., Toland, K., Torrie, C. I., Traylor, G., Tse, M., Urban, A. L., Vajente, G., Valdes, 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. 2020. Sensitivity and performance of the Advanced LIGO detectors in the third observing run. Physical Review D 102 (6) , 062003. 10.1103/PhysRevD.102.062003

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Abstract

On April 1st, 2019, the Advanced Laser Interferometer Gravitational-Wave Observatory (aLIGO), joined by the Advanced Virgo detector, began the third observing run, a year-long dedicated search for gravitational radiation. The LIGO detectors have achieved a higher duty cycle and greater sensitivity to gravitational waves than ever before, with LIGO Hanford achieving angle-averaged sensitivity to binary neutron star coalescences to a distance of 111 Mpc, and LIGO Livingston to 134 Mpc with duty factors of 74.6% and 77.0% respectively. The improvement in sensitivity and stability is a result of several upgrades to the detectors, including doubled intracavity power, the addition of an in-vacuum optical parametric oscillator for squeezed-light injection, replacement of core optics and end reaction masses, and installation of acoustic mode dampers. This paper explores the purposes behind these upgrades, and explains to the best of our knowledge the noise currently limiting the sensitivity of each detector.

Item Type:	Article
Date Type:	Publication
Status:	Published
Schools:	Physics and Astronomy
Additional Information:	Creative Commons Attribution 4.0 International license
Publisher:	American Physical Society
ISSN:	2470-0010
Date of First Compliant Deposit:	3 November 2020
Date of Acceptance:	14 August 2020
Last Modified:	04 May 2023 21:00
URI:	https://orca.cardiff.ac.uk/id/eprint/136110

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