Thermal noise of gram-scale cantilever flexures
We present measurements of thermal noise in niobium and aluminium flexures. Our measurements cover the audio frequency band from 10Hz to 10kHz, which is of particular relevance to ground-based interferometric gravitational wave detectors, and span up to an order of magnitude above and below the fund...
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| Veröffentlicht in: | arXiv.org 2015-06 |
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| creator | Nguyen, Thanh T-H Slagmolen, Bram J J Mow-Lowry, Conor M Miller, John Mullavey, Adam Goßler, Stefan Altin, Paul A Shaddock, Daniel A McClelland, David E |
| description | We present measurements of thermal noise in niobium and aluminium flexures. Our measurements cover the audio frequency band from 10Hz to 10kHz, which is of particular relevance to ground-based interferometric gravitational wave detectors, and span up to an order of magnitude above and below the fundamental flexure resonances at 50Hz - 300Hz. Our results are well-explained by a simple model in which both structural and thermoelastic loss play a role. The ability of such a model to explain this interplay is important for investigations of quantum-radiation-pressure noise and the standard quantum limit. |
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| language | eng |
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| source | Freely Accessible Journals |
| subjects | Aluminum Audio frequencies Flexing Frequencies Gravitational waves Niobium Noise Thermal noise |
| title | Thermal noise of gram-scale cantilever flexures |
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