Control strategy to limit duty cycle impact of earthquakes on the LIGO gravitational-wave detectors

Abstract

Advanced gravitational-wave detectors such as the Laser Interferometer Gravitational-Wave Observatories (LIGO) require an unprecedented level of isolation from the ground. When in operation, they are expected to observe changes in the space-time continuum of less than one thousandth of the diameter of a proton. Strong teleseismic events like earthquakes disrupt the proper functioning of the detectors, and result in a loss of data until the detectors can be returned to their operating states. An earthquake early-warning system, as well as a prediction model have been developed to help understand the impact of earthquakes on LIGO. This paper describes a control strategy to use this early-warning system to reduce the LIGO downtime by 30%. It also presents a plan to implement this new earthquake configuration in the LIGO automation system.

References in corpus (3)

• GW150914: The Advanced LIGO Detectors in the Era of First Discoveries
• Seismic isolation of Advanced LIGO: Review of strategy, instrumentation and performance
• Limiting the effects of earthquakes on gravitational-wave interferometers

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