Improving the robustness of the advanced LIGO detectors to earthquakes

@article{Schwartz2020ImprovingTR,
  title={Improving the robustness of the advanced LIGO detectors to earthquakes},
  author={Eyal Schwartz and Arnaud Pele and Jimmy Warner and Brian Lantz and J Betzwieser and K L Dooley and Sebastien Biscans and Michael W. Coughlin and Nikhil Mukund and Richard J. Abbott and Carl Adams and Rana X. Adhikari and Alena Ananyeva and Stephen Appert and Koji Arai and Joseph Areeda and Yasmeen Asali and Stuart M. Aston and C Austin and A. M. Baer and Matthew Ball and Stefan W. Ballmer and Sharan Banagiri and D. Barker and Lisa Barsotti and Jeffrey Bartlett and B. K. Berger and Dripta Bhattacharjee and G Billingsley and Carl Blair and R. M. Blair and Nina Bode and Phillip Booker and R. G. Bork and Alyssa Bramley and A. F. Brooks and D D Brown and Aaron Buikema and C. Cahillane and Kipp Cannon and X. Chen and Adrian Ciobanu and Filiberto Clara and Sam Cooper and K. Rainer Corley and Stefanie Countryman and P. B. Covas and D C Coyne and Laurence Elise Helene Datrier and Derek Davis and Chiara Di Fronzo and J C Driggers and Peter Dupej and Sheila E. Dwyer and Anamaria Effler and T Etze and Michael Evans and Thomas M. Evans and Jon R. Feicht and {\'A}lvaro Fern{\'a}ndez-Galiana and P. Fritschel and Valera Frolov and P. J. Fulda and Michael Fyffe and J. A. Giaime and Krystal Giardina and Patrick Godwin and Evan Goetz and Slawomir Gras and Corey Gray and Richard Carl Gray and Anna C. Green and Anchal Gupta and Eric K. Gustafson and Richard Gustafson and Jonathan Hanks and Joe Hanson and T Hardwick and R. K. Hasskew and Matthew Heintze and A. F. Helmling-Cornell and Nathan A. Holland and J. Daniel Jones and S Kandhasamy and Sudarshan Karki and Marie Kasprzack and Keita Kawabe and N Kijbunchoo and P. J. King and Jeffrey Kissel and Rahul Kumar and Michael Landry and Benjamin Lane and Michael Laxen and Y Lecoeuche and J. N. Leviton and J Liu and Marc Lormand and Andrew Lundgren and Ronaldas Macas and Myron Macinnis and D Macleod and Georgia L. Mansell and Szabolcs M 'arka and Zsuzsa M 'arka and Denis Martynov and Kenneth R Mason and Thomas Massinger and F. Matichard and N Mavalvala1 and Richard V. McCarthy and D. E. McClelland and Scott McCormick and Lee McCuller and Jess McIver and T G McRae and Greg Mendell and Kara Merfeld and E. L. Merilh and Fabian Meylahn and Timesh Mistry and Richard K Mittleman and Gerardo Moreno and Conor M Mow-Lowry and Simone Mozzon and Adam J Mullavey and T. J. N. Nelson and P Nguyen and Laura K Nuttall and Jason Oberling and Richard J. Oram and Charles Osthelder and David J. Ottaway and Harry Overmier and Jordan Palamos and William Parker and Ethan Payne and Carlos J. Perez and Marc Pirello and Hugh Radkins and K. E. Ramirez and Jonathan W. Richardson and Keith Riles and Norna A. Robertson and Jameson Graef Rollins and Chandra Romel and J H Romie1 and Michael P Ross and Kyle Ryan and Travis Sadecki and E. J. Sanchez and L. E. Sanchez and T. R. Saravanan and Richard L. Savage and Dean M. Schaetzl and Roman Schnabel and Robert M. S. Schofield and Danny Sellers and Thomas Shaffer and Daniel Sigg and Bram J. J. Slagmolen and J. R. Smith and Siddharth Soni and Borja Sorazu and A P Spencer and Kenneth Strain and L. Sun and Marek J. Szczepańczyk and M. Thomas and Patrick Thomas and Keith A. Thorne and Karl Toland and Calum I. Torrie and Gary Traylor and M. Tse and Alexander L. Urban and Gabriele Vajente and Guillermo Valdes and Daniel Vander-Hyde and Peter J. Veitch and Krishna Venkateswara and Gautam Venugopalan and Aaron Viets and Tuan A. Vo and Cheryl Vorvick and Madeline Wade and Robert L. Ward and Betsy Weaver and Rainer Weiss and Chris Whittle and Benno Willke and Christopher C. Wipf and L Xiao and H. Yamamoto and Hang Yu and Haocun Yu and L. Zhang and Michael Edward Zucker and J. G. Zweizig},
  journal={Classical and Quantum Gravity},
  year={2020},
  volume={37}
}
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… 

Identifying glitches near gravitational-wave events using the Q-transform

. We present a computational method to identify glitches in gravitational-wave data that occur nearby gravitational-wave signals. We flag any excess in the data surrounding a signal and compute the

Review of the Advanced LIGO Gravitational Wave Observatories Leading to Observing Run Four

Gravitational waves from binary black hole and neutron star mergers are being regularly detected. As of 2021, 90 confident gravitational wave detections have been made by the LIGO and Virgo

Impact of noise transients on low latency gravitational-wave event localization

Gravitational-wave (GW) data contains non-Gaussian noise transients called ‘glitches’. During the third LIGO-Virgo observing run about 24% of all gravitational-wave candidates were in the vicinity of

Detector Characterization and Mitigation of Noise in Ground-Based Gravitational-Wave Interferometers

Since the early stages of operation of ground-based gravitational-wave interferometers, careful monitoring of these detectors has been an important component of their successful operation and

Optimal sensor fusion method for active vibration isolation systems in ground-based gravitational-wave detectors

Sensor fusion is a technique used to combine sensors with different noise characteristics into a super sensor that has superior noise performance. To achieve sensor fusion, complementary filters are

Lightsaber: A Simulator of the Angular Sensing and Control System in LIGO

Lightsaber, a new time-domain simulator of the ASC in LIGO, a nonlinear simulation of the optomechanical system consisting of the high-power cavity laser beam and the last two stages of suspension in LigO including the ASC is presented.

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

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

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