US

Advanced LIGO - IOPscience

https://doi.org/doi:10.1088/0264-9381/32/7/074001 Archived on 2026-04-26 00:10 UTC
Advanced LIGO - IOPscience
Paper

Advanced LIGO

, , , , , , , , ,

Published 3 March 2015 © 2015 IOP Publishing Ltd
, , Citation The LIGO Scientific Collaboration et al 2015 Class. Quantum Grav. 32 074001DOI 10.1088/0264-9381/32/7/074001

0264-9381/32/7/074001

Abstract

The Advanced LIGO gravitational wave detectors are second-generation instruments designed and built for the two LIGO observatories in Hanford, WA and Livingston, LA, USA. The two instruments are identical in design, and are specialized versions of a Michelson interferometer with 4 km long arms. As in Initial LIGO, Fabry–Perot cavities are used in the arms to increase the interaction time with a gravitational wave, and power recycling is used to increase the effective laser power. Signal recycling has been added in Advanced LIGO to improve the frequency response. In the most sensitive frequency region around 100 Hz, the design strain sensitivity is a factor of 10 better than Initial LIGO. In addition, the low frequency end of the sensitivity band is moved from 40 Hz down to 10 Hz. All interferometer components have been replaced with improved technologies to achieve this sensitivity gain. Much better seismic isolation and test mass suspensions are responsible for the gains at lower frequencies. Higher laser power, larger test masses and improved mirror coatings lead to the improved sensitivity at mid and high frequencies. Data collecting runs with these new instruments are planned to begin in mid-2015.

Export citation and abstractBibTeXRIS

Access this article

The computer you are using is not registered by an institution with a subscription to this article. Please choose one of the options below.

Purchase from

Article Galaxy
CCC RightFind

Purchase this article from our trusted document delivery partners.

Make a recommendation

To gain access to this content, please complete the Recommendation Form and we will follow up with your librarian or Institution on your behalf.

For corporate researchers we can also follow up directly with your R&D manager, or the information management contact at your company. Institutional subscribers have access to the current volume, plus a 10-year back file (where available).

Please wait… references are loading.