Open AccessPosted Content
Mirror thermal noise in laser interferometer gravitational wave detectors operating at room and cryogenic temperature
Janyce Franc,N. Morgado,R. Flaminio,Ronny Nawrodt,I. W. Martin,L. Cunningham,A. Cumming,Sheila Rowan,J. H. Hough +8 more
TLDR
In this article, the authors report about projected mirror thermal noise due to losses in the mirror coatings and substrates and evaluate several of the envisaged substrate and coating materials with room temperature and at cryogenic temperature.Abstract:
Mirror thermal noise is and will remain one of the main limitations to the sensitivity of gravitational wave detectors based on laser interferometers. We report about projected mirror thermal noise due to losses in the mirror coatings and substrates. The evaluation includes all kind of thermal noises presently known. Several of the envisaged substrate and coating materials are considered. The results for mirrors operated at room temperature and at cryogenic temperature are reported.read more
Citations
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Journal ArticleDOI
Mechanical Loss in Tantala/Silica Dielectric Mirror Coatings
Steven D. Penn,Steven D. Penn,Peter H. Sneddon,Helena Armandula,J. Betzwieser,Gianpietro Cagnoli,Jordan Camp,Jordan Camp,David Crooks,Martin M. Fejer,Andri M. Gretarsson,Gregory M. Harry,J. H. Hough,Scott E. Kittelberger,Michael J. Mortonson,Roger K. Route,Sheila Rowan,Christophoros C. Vassiliou +17 more
TL;DR: In this article, the authors investigated sources of mechanical loss in the Ta2O5/SiO2 coatings, including loss associated with the coating-substrate interface, with coating-layer interfaces, and with the bulk material.
Mechanical Dissipation in Silicon Flexures
S. Reid,Gianpietro Cagnoli,David Crooks,J. H. Hough,P. G. Murray,Sheila Rowan,Martin M. Fejer,Roger K. Route,S. Zappe +8 more
TL;DR: The thermo-mechanical properties of silicon make it of significant interest as a possible material for mirror substrates and suspension elements for future long-baseline gravitational wave detectors.
Journal ArticleDOI
Challenges in thermal noise for 3rd generation of gravitational wave detectors
TL;DR: In this paper, the authors review the current status of research on thermal noise in interferometric gravitational wave detectors and discuss possible techniques for use in future ‘3rd generation detectors such as cryogenics and diffractive optics.
Journal ArticleDOI
Optical properties and laser damage threshold of HfO_2-SiO_2 mixed composite thin films
TL;DR: The dependence of the laser damage threshold as a function of silica content has been investigated, and the improved laser-induced damage threshold for films having more than 80% silicacontent has been explained through the defect-assisted multiphoton ionization process.
References
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Book
Thermal Conductivity: Theory, Properties, and Applications
TL;DR: The theory of thermal conductivity in solid materials has been discussed in detail in this article, including thermal properties of thin film and superlattices, and applications of emerging materials such as glasses and ceramic materials.
Journal ArticleDOI
Internal thermal noise in the LIGO test masses: A direct approach
TL;DR: In this paper, the authors apply the fluctuation-dissipation theorem to LIGO's readout observable, x(t) = longitudinal position of test-mass face, weighted by laser beam's Gaussian profile.
Journal ArticleDOI
Exponential Temperature Dependence of Young's Modulus for Several Oxides
TL;DR: In this paper, Young's modulus was measured over the temperature range 77\ifmmode^\circ\else\textdegree\fi{}-850\ifmodesode^ \circ\ else\text degree{}k by an accurate resonance technique, and the results showed that the range of validity of a temperature dependence predicted by theory must be quite small.
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