Sensitivity and Performance of the Advanced LIGO Detectors in the Third Observing Run
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.
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Cite
@article{arxiv.2008.01301,
title = {Sensitivity and Performance of the Advanced LIGO Detectors in the Third Observing Run},
author = {LIGO Instrument Science List and : and A. Buikema and C. Cahillane and G. L. Mansell and C. D. Blair and R. Abbott and C. Adams and R. X. Adhikari and A. Ananyeva and S. Appert and K. Arai and J. S. Areeda and Y. Asali and S. M. Aston and C. Austin and A. M. Baer and M. Ball and S. W. Ballmer and S. Banagiri and D. Barker and L. Barsotti and J. Bartlett and B. K. Berger and J. Betzwieser and D. Bhattacharjee and G. Billingsley and S. Biscans and R. M. Blair and N. Bode and P. Booker and R. Bork and A. Bramley and A. F. Brooks and D. D. Brown and K. C. Cannon and X. Chen and A. A. Ciobanu and F. Clara and S. J. Cooper and K. R. Corley and S. T. Countryman and P. B. Covas and D. C. Coyne and L. E. H. Datrier and D. Davis and C. Di Fronzo and K. L. Dooley and J. C. Driggers and P. Dupej and S. E. Dwyer and A. Effler and T. Etzel and M. Evans and T. M. Evans and J. Feicht and A. Fernandez-Galiana and P. Fritschel and V. V. Frolov and P. Fulda and M. Fyffe and J. A. Giaime and K. D. Giardina and P. Godwin and E. Goetz and S. Gras and C. Gray and R. Gray and A. C. Green and E. K. Gustafson and R. Gustafson and J. Hanks and J. Hanson and T. Hardwick and R. K. Hasskew and M. C. Heintze and A. F. Helmling-Cornell and N. A. Holland and J. D. Jones and S. Kandhasamy and S. Karki and M. Kasprzack and K. Kawabe and N. Kijbunchoo and P. J. King and J. S. Kissel and Rahul Kumar and M. Landry and B. B. Lane and B. Lantz and M. Laxen and Y. K. Lecoeuche and J. Leviton and J. Liu and M. Lormand and A. P. Lundgren and R. Macas and M. MacInnis and D. M. Macleod and S. Márka and Z. Márka and D. V. Martynov and K. Mason and T. J. Massinger and F. Matichard and N. Mavalvala and R. McCarthy and D. E. McClelland and S. McCormick and L. McCuller and J. McIver and T. McRae and G. Mendell and K. Merfeld and E. L. Merilh and F. Meylahn and T. Mistry and R. Mittleman and G. Moreno and C. M. Mow-Lowry and S. Mozzon and A. Mullavey and T. J. N. Nelson and P. Nguyen and L. K. Nuttall and J. Oberling and Richard J. Oram and B. O'Reilly and C. Osthelder and D. J. Ottaway and H. Overmier and J. R. Palamos and W. Parker and E. Payne and A. Pele and R. Penhorwood and C. J. Perez and M. Pirello and H. Radkins and K. E. Ramirez and J. W. Richardson and K. Riles and N. A. Robertson and J. G. Rollins and C. L. Romel and J. H. Romie and M. P. Ross and K. Ryan and T. Sadecki and E. J. Sanchez and L. E. Sanchez and T. R. Saravanan and R. L. Savage and D. Schaetzl and R. Schnabel and R. M. S. Schofield and E. Schwartz and D. Sellers and T. Shaffer and D. Sigg and B. J. J. Slagmolen and J. R. Smith and S. Soni and B. Sorazu and A. P. Spencer and K. A. Strain and L. Sun and M. J. Szczepańczyk and M. Thomas and P. Thomas and K. A. Thorne and K. Toland and C. I. Torrie and G. Traylor and M. Tse and A. L. Urban and G. Vajente and G. Valdes and D. C. Vander-Hyde and P. J. Veitch and K. Venkateswara and G. Venugopalan and A. D. Viets and T. Vo and C. Vorvick and M. Wade and R. L. Ward and J. Warner and B. Weaver and R. Weiss and C. Whittle and B. Willke and C. C. Wipf and L. Xiao and H. Yamamoto and Hang Yu and Haocun Yu and L. Zhang and M. E. Zucker and J. Zweizig},
journal= {arXiv preprint arXiv:2008.01301},
year = {2020}
}
Comments
27 pages, 11 figures. v2 edits: minor wording changes, author additions, and grayscale-friendly figures