期刊
CLASSICAL AND QUANTUM GRAVITY
卷 27, 期 3, 页码 -出版社
IOP Publishing Ltd
DOI: 10.1088/0264-9381/27/3/035013
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资金
- ILIAS Strega
- Leverhulme Trust
- STFC
- University of Glasgow in the UK
- NSF in the USA [PHY-9210038]
- STFC [ST/G504284/1, ST/I000518/1, PP/F001118/1, ST/I001085/1] Funding Source: UKRI
- Science and Technology Facilities Council [ST/I000518/1, PP/F001118/1, ST/G504284/1, ST/I001085/1] Funding Source: researchfish
- Direct For Mathematical & Physical Scien
- Division Of Physics [0757058] Funding Source: National Science Foundation
The planned upgrades to the LIGO gravitational wave detectors include monolithic mirror suspensions to reduce thermal noise. The mirrors will be suspended using CO2 laser-drawn fused silica fibres. We present here measurements of mechanical dissipation in synthetic fused silica fibres drawn using a CO2 laser. The level of dissipation in the surface layer is investigated and is found to be at a similar level to fibres produced using a gas flame. Also presented is a method for examining dissipation at welded interfaces, showing clear evidence of the existence of this loss mechanism which forms an additional component of the total detector thermal noise. Modelling of a typical detector suspension configuration shows that the thermal noise contribution from this loss source will be negligible.
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