Journal
CLASSICAL AND QUANTUM GRAVITY
Volume 31, Issue 3, Pages -Publisher
IOP PUBLISHING LTD
DOI: 10.1088/0264-9381/31/3/035019
Keywords
gravitational waves; thermal noise; optical coatings; silica; mechanical dissipation; precision measurement
Categories
Funding
- STFC
- University of Glasgow
- German Science Foundation [SFB Transregio 7]
- Royal Society Research Fellowship
- Royal Society of Edinburgh Research Fellowship
- Science and Technology Facilities Council [ST/L000792/1 Gravitational Waves, Gravitational Waves, ST/L000938/1, PP/F001118/1, ST/L000806/1, ST/F01032X/1, ST/L003465/1, ST/J000361/1, ST/L000792/1, ST/L000938/1 Gravitational Waves, ST/L000946/1] Funding Source: researchfish
- STFC [PP/F001118/1, ST/L000806/1, ST/J000361/1, ST/L000938/1, ST/L003465/1, ST/F01032X/1, Gravitational Waves, ST/L000792/1, ST/L000946/1] Funding Source: UKRI
- Direct For Mathematical & Physical Scien
- Division Of Physics [1002585, 1307423, 1068596] Funding Source: National Science Foundation
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Thermal noise arising from mechanical dissipation in oxide mirror coatings is an important limit to the sensitivity of future gravitational wave detectors, optical atomic clocks and other precision measurement systems. Here, we present measurements of the temperature dependence of the mechanical dissipation of an ion-beam sputtered silica film between 10 and 300 K. A dissipation peak was observed at 20 K and the low temperature dissipation was found to have significantly different characteristics than observed for bulk silica and silica films deposited by alternative techniques. These results are important for better understanding the underlying mechanisms of mechanical dissipation, and thus thermal noise, in the most commonly-used reflective coatings for precision measurements.
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