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