Using a network of seismometers and sets of optimal filters, we implemented a feed-forward control technique to minimize the seismic contribution to multiple interferometric degrees of freedom of the Laser Interferometer Gravitational-wave Observatory interferometers. The filters are constructed by using the Levinson-Durbin recursion relation to approximate the optimal Wiener filter. By reducing the RMS of the interferometer feedback signals below 10Hz, we have improved the stability and duty cycle of the joint network of gravitational wave detectors. By suppressing the large control forces and mirror motions, we have dramatically reduced the rate of non-Gaussian transients in the gravitational wave signal stream. © 2012 IOP Publishing Ltd.
Publication Source (Journal or Book title)
Classical and Quantum Gravity
Derosa, R., Driggers, J., Atkinson, D., Miao, H., Frolov, V., Landry, M., Giaime, J., & Adhikari, R. (2012). Global feed-forward vibration isolation in a km scale interferometer. Classical and Quantum Gravity, 29 (21) https://doi.org/10.1088/0264-9381/29/21/215008