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Improving the robustness of the advanced LIGO detectors to earthquakes

Schwartz, E. and Pele, A. and Warner, J. and Lantz, B. and Betzwieser, J. and Dooley, K. L. and Biscans, S. and Coughlin, M. and Mukund, N. and Abbott, R. and Adams, C. and Adhikari, R. X. and Ananyeva, A. and Appert, S. and Arai, K. and Areeda, J. S. and Asali, Y. and Aston, S. M. and Austin, C. and Baer, A. M. and Ball, M. and Ballmer, S. W. and Banagiri, S. and Barker, D. and Barsotti, L. and Bartlett, J. and Berger, B. K. and Bhattacharjee, D. and Billingsley, G. and Blair, C. D. and Blair, R. M. and Bode, N. and Booker, P. and Bork, R. and Bramley, A. and Brooks, A. F. and Brown, D. D. and Buikema, A. and Cahillane, C. and Cannon, K. C. and Chen, X. and Ciobanu, A. A. and Clara, F. and Cooper, S. J. and Corley, K. R. and Countryman, S. T. and Covas, P. B. and Coyne, D. C. and Datrier, L. E. H. and Davis, D. and Di Fronzo, C. and Driggers, J. C. and Dupej, P. and Dwyer, S. E. and Effler, A. and Etzel, T. and Evans, M. and Evans, T. M. and Feicht, J. and Fernandez-Galiana, A. and Fritschel, P. and Frolov, V. V. and Fulda, P. and Fyffe, M. and Giaime, J. A. and Giardina, K. D. and Godwin, P. and Goetz, E. and Gras, S. and Gray, C. and Gray, R. and Green, A. C. and Gupta, Anchal and Gustafson, E. K. and Gustafson, R. and Hanks, J. and Hanson, J. and Hardwick, T. and Hasskew, R. K. and Heintze, M. C. and Helmling-Cornell, A. F. and Holland, N. A. and Jones, J. D. and Kandhasamy, S. and Karki, S. and Kasprzack, M. and Kawabe, K. and Kijbunchoo, N. and King, P. J. and Kissel, J. S. and Kumar, Rahul and Landry, M. and Lane, B. B. and Laxen, M. and Lecoeuche, Y. K. and Leviton, J. and Liu, J. and Lormand, M. and Lundgren, A. P. and Macas, R. and MacInnis, M. and Macleod, D. M. and Mansell, G. L. and Márka, S. and Márka, Z. and Martynov, D. V. and Mason, K. and Massinger, T. J. and Matichard, F. and Mavalvala, N. and McCarthy, R. and McClelland, D. E. and McCormick, S. and McCuller, L. and McIver, J. and McRae, T. and Mendell, G. and Merfeld, K. and Merilh, E. L. and Meylahn, F. and Mistry, T. and Mittleman, R. and Moreno, G. and Mow-Lowry, C. M. and Mozzon, S. and Mullavey, A. and Nelson, T. J. N. and Nguyen, P. and Nuttall, L. K. and Oberling, J. and Oram, Richard J. and Osthelder, C. and Ottaway, D. J. and Overmier, H. and Palamos, J. R. and Parker, W. and Payne, E. and Perez, C. J. and Pirello, M. and Radkins, H. and Ramirez, K. E. and Richardson, J. W. and Riles, K. and Robertson, N. A. and Rollins, J. G. and Romel, C. L. and Romie, J. H. and Ross, M. P. and Ryan, K. and Sadecki, T. and Sanchez, E. J. and Sanchez, L. E. and Saravanan, T. R. and Savage, R. L. and Schaetzl, D. and Schnabel, R. and Schofield, R. M. S. and Sellers, D. and Shaffer, T. and Sigg, D. and Slagmolen, B. J. J. and Smith, J. R. and Soni, S. and Sorazu, B. and Spencer, A. P. and Strain, K. A. and Sun, L. and Szczepańczyk, M. J. and Thomas, M. and Thomas, P. and Thorne, K. A. and Toland, K. and Torrie, C. I. and Traylor, G. and Tse, M. and Urban, A. L. and Vajente, G. and Valdes, G. and Vander-Hyde, D. C. and Veitch, P. J. and Venkateswara, K. and Venugopalan, G. and Viets, A. D. and Vo, T. and Vorvick, C. and Wade, M. and Ward, R. L. and Weaver, B. and Weiss, R. and Whittle, C. and Willke, B. and Wipf, C. C. and Xiao, L. and Yamamoto, H. and Yu, H. and Yu, H. and Zhang, L. and Zucker, M. E. and Zweizig, J. (2020) Improving the robustness of the advanced LIGO detectors to earthquakes. Classical and Quantum Gravity, 37 (23). Art. No. 235007. ISSN 0264-9381.

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Teleseismic, or distant, earthquakes regularly disrupt the operation of ground–based gravitational wave detectors such as Advanced LIGO. Here, we present EQ mode, a new global control scheme, consisting of an automated sequence of optimized control filters that reduces and coordinates the motion of the seismic isolation platforms during earthquakes. This, in turn, suppresses the differential motion of the interferometer arms with respect to one another, resulting in a reduction of DARM signal at frequencies below 100 mHz. Our method greatly improved the interferometers' capability to remain operational during earthquakes, with ground velocities up to 3.9 μm s⁻¹ rms in the beam direction, setting a new record for both detectors. This sets a milestone in seismic controls of the Advanced LIGO detectors' ability to manage high ground motion induced by earthquakes, opening a path for further robust operation in other extreme environmental conditions.

Item Type:Article
Related URLs:
URLURL TypeDescription Paper
Schwartz, E.0000-0001-8922-7794
Pele, A.0000-0002-1873-3769
Lantz, B.0000-0002-7404-4845
Dooley, K. L.0000-0002-1636-0233
Biscans, S.0000-0002-9635-7527
Mukund, N.0000-0002-8666-9156
Adhikari, R. X.0000-0002-5731-5076
Arai, K.0000-0001-8916-8915
Barsotti, L.0000-0001-9819-2562
Billingsley, G.0000-0002-4141-2744
Brooks, A. F.0000-0003-4295-792X
Buikema, A.0000-0001-9409-5757
Cahillane, C.0000-0002-3888-314X
Cannon, K. C.0000-0003-4068-6572
Coyne, D. C.0000-0002-6427-3222
Davis, D.0000-0001-5620-6751
Evans, T. M.0000-0001-5442-1300
Fernandez-Galiana, A.0000-0002-8940-9261
Fritschel, P.0000-0003-1983-3187
Gupta, Anchal0000-0002-1762-9644
Kijbunchoo, N.0000-0002-2874-1228
Kissel, J. S.0000-0002-1702-9577
Massinger, T. J.0000-0002-3429-5025
Matichard, F.0000-0001-8982-8418
McCuller, L.0000-0003-0851-0593
McIver, J.0000-0003-0316-1355
Richardson, J. W.0000-0002-1472-4806
Rollins, J. G.0000-0002-9388-2799
Schnabel, R.0000-0003-2896-4218
Sigg, D.0000-0003-4606-6526
Sun, L.0000-0001-7959-892X
Tse, M.0000-0003-1510-4921
Vajente, G.0000-0002-7656-6882
Venugopalan, G.0000-0003-4414-9918
Whittle, C.0000-0002-8833-7438
Xiao, L.0000-0003-2703-449X
Yamamoto, H.0000-0001-6919-9570
Zhang, L.0000-0002-0898-787X
Zucker, M. E.0000-0002-2544-1596
Zweizig, J.0000-0002-1521-3397
Additional Information:© 2020 IOP Publishing Ltd. Received 30 July 2020; Revised 11 September 2020; Accepted 29 September 2020; Published 5 November 2020. The authors thank the LIGO Scientific Collaboration for access to the data and 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. This project was supported by NSF Grants: PHY-1708006 and PHY-1608922. ES acknowledge the LSC FELLOWS program for supporting his research at LIGO Livingston Observatory. 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 PHY-1764464 . This paper carries LIGO Document Number LIGO-P2000072.
Funding AgencyGrant Number
Science and Technology Facilities Council (STFC)UNSPECIFIED
Max Planck SocietyUNSPECIFIED
Australian Research CouncilUNSPECIFIED
Other Numbering System:
Other Numbering System NameOther Numbering System ID
LIGO DocumentP2000072
Issue or Number:23
Record Number:CaltechAUTHORS:20201110-144418660
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Official Citation:E Schwartz et al 2020 Class. Quantum Grav. 37 235007
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:106596
Deposited By: Tony Diaz
Deposited On:11 Nov 2020 00:22
Last Modified:11 Nov 2020 00:22

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