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

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

doi:10.1103/PhysRevD.102.062003

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

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

Research output: Contribution to Journal › Article › Academic › peer-review

Abstract

© 2020 authors. Published by the American Physical Society.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.

Original language	English
Article number	062003
Journal	Physical Review D
Volume	102
Issue number	6
DOIs	https://doi.org/10.1103/PhysRevD.102.062003
Publication status	Published - 11 Sept 2020
Externally published	Yes

Funding

The authors gratefully acknowledge the support of the United States National Science Foundation (NSF) for the construction and operation of the LIGO Laboratory and Advanced LIGO as well as the Science and Technology Facilities Council (STFC) of the United Kingdom, and the Max-Planck-Society (MPS) for support of the construction of Advanced LIGO. Additional support for Advanced LIGO was provided by the Australian Research Council. The authors acknowledge the LIGO Scientific Collaboration Fellows program for additional support. LIGO was constructed by the California Institute of Technology and Massachusetts Institute of Technology with funding from the National Science Foundation, and operates under cooperative Agreement No. PHY-1764464. Advanced LIGO was built under Award No. PHY-0823459. This paper carries LIGO Document Number LIGO-P2000122.

Funders	Funder number
California Institute of Technology and Massachusetts Institute of Technology	PHY-1764464
National Science Foundation
Directorate for Mathematical and Physical Sciences	1764464, 0823459
Science and Technology Facilities Council
Australian Research Council

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10.1103/PhysRevD.102.062003

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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., ... Zweizig, J. (2020). Sensitivity and performance of the Advanced LIGO detectors in the third observing run. Physical Review D, 102(6), Article 062003. https://doi.org/10.1103/PhysRevD.102.062003

@article{5d2acd7b533c475cadf03bef1cbc251e,

title = "Sensitivity and performance of the Advanced LIGO detectors in the third observing run",

abstract = "{\textcopyright} 2020 authors. Published by the American Physical Society.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.",

author = "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 {Di Fronzo}, C. 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 R. 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. M{\'a}rka and Z. M{\'a}rka 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 R.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. Szczepa{\'n}czyk 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 H. Yu and H. Yu and L. Zhang and M.E. Zucker and J. Zweizig",

year = "2020",

month = sep,

day = "11",

doi = "10.1103/PhysRevD.102.062003",

language = "English",

volume = "102",

journal = "Physical Review D",

issn = "2470-0010",

publisher = "American Physical Society",

number = "6",

}

Buikema, A, Cahillane, C, Mansell, GL, Blair, CD, Abbott, R, Adams, C, Adhikari, RX, Ananyeva, A, Appert, S, Arai, K, Areeda, JS, Asali, Y, Aston, SM, Austin, C, Baer, AM, Ball, M, Ballmer, SW, Banagiri, S, Barker, D, Barsotti, L, Bartlett, J, Berger, BK, Betzwieser, J, Bhattacharjee, D, Billingsley, G, Biscans, S, Blair, RM, Bode, N, Booker, P, Bork, R, Bramley, A, Brooks, AF, Brown, DD, Cannon, KC, Chen, X, Ciobanu, AA, Clara, F, Cooper, SJ, Corley, KR, Countryman, ST, Covas, PB, Coyne, DC, Datrier, LEH, Davis, D, Di Fronzo, C, Dooley, KL, Driggers, JC, Dupej, P, Dwyer, SE, Effler, A, Etzel, T, Evans, M, Evans, TM, Feicht, J, Fernandez-Galiana, A, Fritschel, P, Frolov, VV, Fulda, P, Fyffe, M, Giaime, JA, Giardina, KD, Godwin, P, Goetz, E, Gras, S, Gray, C, Gray, R, Green, AC, Gustafson, EK, Gustafson, R, Hanks, J, Hanson, J, Hardwick, T, Hasskew, RK, Heintze, MC, Helmling-Cornell, AF, Holland, NA, Jones, JD, Kandhasamy, S, Karki, S, Kasprzack, M, Kawabe, K, Kijbunchoo, N, King, PJ, Kissel, JS, Kumar, R, Landry, M, Lane, BB, Lantz, B, Laxen, M, Lecoeuche, YK, Leviton, J, Liu, J, Lormand, M, Lundgren, AP, Macas, R, Macinnis, M, Macleod, DM, Márka, S, Márka, Z, Martynov, DV, Mason, K, Massinger, TJ, Matichard, F, Mavalvala, N, McCarthy, R, McClelland, DE, McCormick, S, McCuller, L, McIver, J, McRae, T, Mendell, G, Merfeld, K, Merilh, EL, Meylahn, F, Mistry, T, Mittleman, R, Moreno, G, Mow-Lowry, CM, Mozzon, S, Mullavey, A, Nelson, TJN, Nguyen, P, Nuttall, LK, Oberling, J, Oram, RJ, O'Reilly, B, Osthelder, C, Ottaway, DJ, Overmier, H, Palamos, JR, Parker, W, Payne, E, Pele, A, Penhorwood, R, Perez, CJ, Pirello, M, Radkins, H, Ramirez, KE, Richardson, JW, Riles, K, Robertson, NA, Rollins, JG, Romel, CL, Romie, JH, Ross, MP, Ryan, K, Sadecki, T, Sanchez, EJ, Sanchez, LE, Saravanan, TR, Savage, RL, Schaetzl, D, Schnabel, R, Schofield, RMS, Schwartz, E, Sellers, D, Shaffer, T, Sigg, D, Slagmolen, BJJ, Smith, JR, Soni, S, Sorazu, B, Spencer, AP, Strain, KA, Sun, L, Szczepańczyk, MJ, Thomas, M, Thomas, P, Thorne, KA, Toland, K, Torrie, CI, Traylor, G, Tse, M, Urban, AL, Vajente, G, Valdes, G, Vander-Hyde, DC, Veitch, PJ, Venkateswara, K, Venugopalan, G, Viets, AD, Vo, T, Vorvick, C, Wade, M, Ward, RL, Warner, J, Weaver, B, Weiss, R, Whittle, C, Willke, B, Wipf, CC, Xiao, L, Yamamoto, H, Yu, H, Yu, H, Zhang, L, Zucker, ME & Zweizig, J 2020, 'Sensitivity and performance of the Advanced LIGO detectors in the third observing run', Physical Review D, vol. 102, no. 6, 062003. https://doi.org/10.1103/PhysRevD.102.062003

TY - JOUR

T1 - Sensitivity and performance of the Advanced LIGO detectors in the third observing run

AU - Buikema, A.

AU - Cahillane, C.

AU - Mansell, G.L.

AU - Blair, C.D.

AU - Abbott, R.

AU - Adams, C.

AU - Adhikari, R.X.

AU - Ananyeva, A.

AU - Appert, S.

AU - Arai, K.

AU - Areeda, J.S.

AU - Asali, Y.

AU - Aston, S.M.

AU - Austin, C.

AU - Baer, A.M.

AU - Ball, M.

AU - Ballmer, S.W.

AU - Banagiri, S.

AU - Barker, D.

AU - Barsotti, L.

AU - Bartlett, J.

AU - Berger, B.K.

AU - Betzwieser, J.

AU - Bhattacharjee, D.

AU - Billingsley, G.

AU - Biscans, S.

AU - Blair, R.M.

AU - Bode, N.

AU - Booker, P.

AU - Bork, R.

AU - Bramley, A.

AU - Brooks, A.F.

AU - Brown, D.D.

AU - Cannon, K.C.

AU - Chen, X.

AU - Ciobanu, A.A.

AU - Clara, F.

AU - Cooper, S.J.

AU - Corley, K.R.

AU - Countryman, S.T.

AU - Covas, P.B.

AU - Coyne, D.C.

AU - Datrier, L.E.H.

AU - Davis, D.

AU - Di Fronzo, C.

AU - Dooley, K.L.

AU - Driggers, J.C.

AU - Dupej, P.

AU - Dwyer, S.E.

AU - Effler, A.

AU - Etzel, T.

AU - Evans, M.

AU - Evans, T.M.

AU - Feicht, J.

AU - Fernandez-Galiana, A.

AU - Fritschel, P.

AU - Frolov, V.V.

AU - Fulda, P.

AU - Fyffe, M.

AU - Giaime, J.A.

AU - Giardina, K.D.

AU - Godwin, P.

AU - Goetz, E.

AU - Gras, S.

AU - Gray, C.

AU - Gray, R.

AU - Green, A.C.

AU - Gustafson, E.K.

AU - Gustafson, R.

AU - Hanks, J.

AU - Hanson, J.

AU - Hardwick, T.

AU - Hasskew, R.K.

AU - Heintze, M.C.

AU - Helmling-Cornell, A.F.

AU - Holland, N.A.

AU - Jones, J.D.

AU - Kandhasamy, S.

AU - Karki, S.

AU - Kasprzack, M.

AU - Kawabe, K.

AU - Kijbunchoo, N.

AU - King, P.J.

AU - Kissel, J.S.

AU - Kumar, R.

AU - Landry, M.

AU - Lane, B.B.

AU - Lantz, B.

AU - Laxen, M.

AU - Lecoeuche, Y.K.

AU - Leviton, J.

AU - Liu, J.

AU - Lormand, M.

AU - Lundgren, A.P.

AU - Macas, R.

AU - Macinnis, M.

AU - Macleod, D.M.

AU - Márka, S.

AU - Márka, Z.

AU - Martynov, D.V.

AU - Mason, K.

AU - Massinger, T.J.

AU - Matichard, F.

AU - Mavalvala, N.

AU - McCarthy, R.

AU - McClelland, D.E.

AU - McCormick, S.

AU - McCuller, L.

AU - McIver, J.

AU - McRae, T.

AU - Mendell, G.

AU - Merfeld, K.

AU - Merilh, E.L.

AU - Meylahn, F.

AU - Mistry, T.

AU - Mittleman, R.

AU - Moreno, G.

AU - Mow-Lowry, C.M.

AU - Mozzon, S.

AU - Mullavey, A.

AU - Nelson, T.J.N.

AU - Nguyen, P.

AU - Nuttall, L.K.

AU - Oberling, J.

AU - Oram, R.J.

AU - O'Reilly, B.

AU - Osthelder, C.

AU - Ottaway, D.J.

AU - Overmier, H.

AU - Palamos, J.R.

AU - Parker, W.

AU - Payne, E.

AU - Pele, A.

AU - Penhorwood, R.

AU - Perez, C.J.

AU - Pirello, M.

AU - Radkins, H.

AU - Ramirez, K.E.

AU - Richardson, J.W.

AU - Riles, K.

AU - Robertson, N.A.

AU - Rollins, J.G.

AU - Romel, C.L.

AU - Romie, J.H.

AU - Ross, M.P.

AU - Ryan, K.

AU - Sadecki, T.

AU - Sanchez, E.J.

AU - Sanchez, L.E.

AU - Saravanan, T.R.

AU - Savage, R.L.

AU - Schaetzl, D.

AU - Schnabel, R.

AU - Schofield, R.M.S.

AU - Schwartz, E.

AU - Sellers, D.

AU - Shaffer, T.

AU - Sigg, D.

AU - Slagmolen, B.J.J.

AU - Smith, J.R.

AU - Soni, S.

AU - Sorazu, B.

AU - Spencer, A.P.

AU - Strain, K.A.

AU - Sun, L.

AU - Szczepańczyk, M.J.

AU - Thomas, M.

AU - Thomas, P.

AU - Thorne, K.A.

AU - Toland, K.

AU - Torrie, C.I.

AU - Traylor, G.

AU - Tse, M.

AU - Urban, A.L.

AU - Vajente, G.

AU - Valdes, G.

AU - Vander-Hyde, D.C.

AU - Veitch, P.J.

AU - Venkateswara, K.

AU - Venugopalan, G.

AU - Viets, A.D.

AU - Vo, T.

AU - Vorvick, C.

AU - Wade, M.

AU - Ward, R.L.

AU - Warner, J.

AU - Weaver, B.

AU - Weiss, R.

AU - Whittle, C.

AU - Willke, B.

AU - Wipf, C.C.

AU - Xiao, L.

AU - Yamamoto, H.

AU - Yu, H.

AU - Zhang, L.

AU - Zucker, M.E.

AU - Zweizig, J.

PY - 2020/9/11

Y1 - 2020/9/11

N2 - © 2020 authors. Published by the American Physical Society.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.

AB - © 2020 authors. Published by the American Physical Society.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.

U2 - 10.1103/PhysRevD.102.062003

DO - 10.1103/PhysRevD.102.062003

M3 - Article

SN - 2470-0010

VL - 102

JO - Physical Review D

JF - Physical Review D

IS - 6

M1 - 062003

ER -

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

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