Journal
CLASSICAL AND QUANTUM GRAVITY
Volume 32, Issue 7, Pages -Publisher
IOP Publishing Ltd
DOI: 10.1088/0264-9381/32/7/074001
Keywords
gravitational waves; interferometers; seismic isolation; optics
Categories
Funding
- Australian Research Council
- International Science Linkages programme of the Commonwealth of Australia
- Council of Scientific and Industrial Research of India
- Istituto Nazionale di Fisica Nucleare of Italy
- Spanish Ministerio de Economia y Competitividad
- Conselleria d'Economia, Hisenda i Innovacio of the Govern de les Illes Balears
- Royal Society
- Scottish Funding Council
- Scottish Universities Physics Alliance
- National Aeronautics and Space Administration
- OTKA of Hungary
- National Research Foundation of Korea
- Industry Canada
- Province of Ontario through the Ministry of Economic Development and Innovation
- National Science and Engineering Research Council Canada
- Carnegie Trust
- Leverhulme Trust
- David and Lucile Packard Foundation
- Research Corporation
- Alfred P. Sloan Foundation
- Science and Technology Facilities Council [ST/L000946/1, ST/L000911/1, PPA/G/S/2002/00652, ST/L000962/1 Gravitational Waves, ST/L000938/1, 1362895, ST/I006277/1, ST/I006285/1, ST/K000845/1, ST/G504284/1, ST/J00166X/1, ST/J000019/1, ST/I006269/1 Gravitational Waves, ST/L000962/1, ST/L003465/1, ST/L000938/1 Gravitational Waves, ST/J000019/1 Gravitational Waves, ST/K005014/1, ST/J000361/1, ST/M006735/1, Gravitational Waves, ST/I006269/1, ST/L000911/1 Gravitational Waves] Funding Source: researchfish
- Direct For Mathematical & Physical Scien
- Division Of Physics [1205512, 1305864, 1067985, 1505308, 1307429, 1204371, 1308527, 1255650, 1505779, 1404121, 1205882] Funding Source: National Science Foundation
- Division Of Human Resource Development
- Direct For Education and Human Resources [1242090] Funding Source: National Science Foundation
- Division Of Physics
- Direct For Mathematical & Physical Scien [1404139, 1307401, 1307423, 1207010, 1307020, 1505598, 0955929] Funding Source: National Science Foundation
Ask authors/readers for more resources
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.
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