Advanced LIGO
Date
2015
Authors
LIGO Scientific Collaboration,
Aasi, J.
Abbott, B.
Abbott, R.
Abbott, T.
Abernathy, M.
Ackley, K.
Adams, C.
Adams, T.
Addesso, P.
Editors
Advisors
Journal Title
Journal ISSN
Volume Title
Type:
Journal article
Citation
Classical and Quantum Gravity, 2015; 32(7):074001-1-074001-41
Statement of Responsibility
The LIGO Scientific Collaboration ... S E Hollitt ... D J Hosken ... E J King ... J Munch ... D J Ottaway ... P J Veitch ... et al.
Conference Name
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.
School/Discipline
Dissertation Note
Provenance
Description
Part of Focus Issue: Advanced Interferometric Gravitational Wave Detectors
Access Status
Rights
© 2015 IOP Publishing Ltd