Advanced LIGO Two-Stage Twelve-Axis Vibration Isolation and Positioning Platform. Part 1: Design and Production Overview

Fabrice Matichard; Brian Lantz; Kenneth Mason; Richard Mittleman; Benjamin Abbott; Samuel Abbott; Eric Allwine; Samuel Barnum; Jeremy Birch; Sebastien Biscans; Daniel Clark; Dennis Coyne; Dan DeBra; Ryan DeRosa; Stephany Foley; Peter Fritschel; Joseph A Giaime; Corey Gray; Gregory Grabeel; Joe Hanson; Michael Hillard; Jeffrey Kissel; Christopher Kucharczyk; Adrien Le Roux; Vincent Lhuillier; Myron Macinnis; Brian OReilly; David Ottaway; Hugo Paris; Michael Puma; Hugh Radkins; Celine Ramet; Mitchell Robinson; Laurent Ruet; Pradeep Sareen; Daivid Shoemaker; Andy Stein; Jeremy Thomas; Michael Vargas; Jimmy Warner

arXiv · 1407.6377

Advanced LIGO Two-Stage Twelve-Axis Vibration Isolation and Positioning Platform. Part 1: Design and Production Overview

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Abstract

New generations of gravity wave detectors require unprecedented levels of vibration isolation. This paper presents the final design of the vibration isolation and positioning platform used in Advanced LIGO to support the interferometers core optics. This five-ton two-and-half-meter wide system operates in ultra-high vacuum. It features two stages of isolation mounted in series. The stages are imbricated to reduce the overall height. Each stage provides isolation in all directions of translation and rotation. The system is instrumented with a unique combination of low noise relative and inertial sensors. The active control provides isolation from 0.1 Hz to 30 Hz. It brings the platform motion down to 10^(-11) m/Hz^(0.5) at 1 Hz. Active and passive isolation combine to bring the platform motion below 10^(-12) m/Hz^(0.5) at 10 Hz. The passive isolation lowers the motion below 10^(-13) m/Hz^(0.5) at 100 Hz. The paper describes how the platform has been engineered not only to meet the isolation requirements, but also to permit the construction, testing, and commissioning process of the fifteen units needed for Advanced LIGO observatories.

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Fabrice Matichard, Brian Lantz, Kenneth Mason, Richard Mittleman, Benjamin Abbott, Samuel Abbott, Eric Allwine, Samuel Barnum, Jeremy Birch, Sebastien Biscans, Daniel Clark, Dennis Coyne, Dan DeBra, Ryan DeRosa, Stephany Foley, Peter Fritschel, Joseph A Giaime, Corey Gray, Gregory Grabeel, Joe Hanson, Michael Hillard, Jeffrey Kissel, Christopher Kucharczyk, Adrien Le Roux, Vincent Lhuillier, Myron Macinnis, Brian OReilly, David Ottaway, Hugo Paris, Michael Puma, Hugh Radkins, Celine Ramet, Mitchell Robinson, Laurent Ruet, Pradeep Sareen, Daivid Shoemaker, Andy Stein, Jeremy Thomas, Michael Vargas, Jimmy Warner. 2014-07-23. Advanced LIGO Two-Stage Twelve-Axis Vibration Isolation and Positioning Platform. Part 1: Design and Production Overview. https://arxiv.org/abs/1407.6377

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