Advanced LIGO
Name
AdvLIGO_CQG_v6.pdf
Size
6.59 MB
Format
Adobe PDF
Checksum (MD5)
e9289a5df45d827eb15f1b92e83b0b88
Author(s)
Aggarwal, Nancy
Barsotti, Lisa
Biscans, Sebastien
Bodiya, Timothy P.
Brown, N. M.
Buikema, Aaron
Essick, Reed Clasey
Isogai, Tomoki
Katsavounidis, Erotokritos
Lynch, Ryan Christopher
Date Issued
March 2015
Journal
Classical and Quantum Gravity
Publisher
IOP Publishing
Citation
Aasi, J, B P Abbott, R Abbott, T Abbott, M R Abernathy, K Ackley, C Adams, et al. “Advanced LIGO.” Classical and Quantum Gravity 32, no. 7 (March 3, 2015): 074001.
Version
Author's final manuscript
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.
MIT Department
Lincoln Laboratory
Massachusetts Institute of Technology. Department of Physics
LIGO (Observatory : Massachusetts Institute of Technology)
MIT Kavli Institute for Astrophysics and Space Research
Terms of Use
Creative Commons Attribution-Noncommercial-Share Alike
Persistent DSpace Link
DOI of Published Version
https://doi.org/10.1088/0264-9381/32/7/074001
