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Improving the robustness of the advanced LIGO detectors to earthquakes
Name
2007.12847.pdf
Description
Submitted version
Size
1.2 MB
Format
Adobe PDF
Checksum (MD5)
e2fb4e0c113cccd5fdea8c6590e6f765
Date Issued
2020
Journal
Classical and Quantum Gravity
Publisher
IOP Publishing
Version
Original manuscript
Abstract
© 2020 IOP Publishing Ltd. 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.
Terms of Use
Creative Commons Attribution-Noncommercial-Share Alike
Persistent DSpace Link
DOI of Published Version
10.1088/1361-6382/abbc8c
