Thermal noise from optical coatings in gravitational wave detectors
| Autor: | Gianpietro Cagnoli, P. G. Murray, J. H. Hough, Gregory M. Harry, Martin M. Fejer, Peter H. Sneddon, Eric D. Black, Stuart Reid, Steven D. Penn, Sheila Rowan, H. Armandula, Roger K. Route, David Crooks |
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| Rok vydání: | 2006 |
| Předmět: |
Physics
Gravitational-wave observatory Gravitational wave business.industry General relativity Materials Science (miscellaneous) Noise (electronics) Industrial and Manufacturing Engineering Neutron star Optical coating Optics Thermal Astronomical interferometer Business and International Management business |
| Zdroj: | Applied Optics. 45:1569 |
| ISSN: | 1539-4522 0003-6935 |
| Popis: | Gravitational waves are a prediction of Einstein's general theory of relativity. These waves are created by massive objects, like neutron stars or black holes, oscillating at speeds appreciable to the speed of light. The detectable effect on the Earth of these waves is extremely small, however, creating strains of the order of 10(-21). There are a number of basic physics experiments around the world designed to detect these waves by using interferometers with very long arms, up to 4 km in length. The next-generation interferometers are currently being designed, and the thermal noise in the mirrors will set the sensitivity over much of the usable bandwidth. Thermal noise arising from mechanical loss in the optical coatings put on the mirrors will be a significant source of noise. Achieving higher sensitivity through lower mechanical loss coatings, while preserving the crucial optical and thermal properties, is an area of active research right now. |
| Databáze: | OpenAIRE |
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