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Mechanical Dissipation in Silicon Flexures

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TLDR
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.
Abstract
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. The mechanical dissipation in 92 μm thick 〈110〉 single-crystal silicon cantilevers has been observed over the temperature range 85 K to 300 K, with dissipation approaching levels down to ϕ=4.4×10−7.

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Phd by thesis

TL;DR: In this paper, a sedimentological core and petrographic characterisation of samples from eleven boreholes from the Lower Carboniferous of Bowland Basin (Northwest England) is presented.
Journal ArticleDOI

The Einstein Telescope: a third-generation gravitational wave observatory

M. Punturo, +134 more
TL;DR: The third-generation ground-based observatory Einstein Telescope (ET) project as discussed by the authors is currently in its design study phase, and it can be seen as the first step in this direction.
Journal ArticleDOI

Theory of Thermoelastic Damping in Micromechanical Resonators With Two-Dimensional Heat Conduction

TL;DR: In this paper, an exact theory for TED with 2-dimensional heat conduction was presented, which enables a detailed evaluation of the accuracy of the quasi-1-D theories for low-loss vacuum-operated micro-and nanomechanical resonators used in microelectro- mechanical systems.

Thermoelastic Damping in Micro- and Nano-Mechanical Systems.

Abstract: The importance of thermoelastic damping as a fundamental dissipation mechanism for small-scale mechanical resonators is evaluated in light of recent efforts to design high-Q micrometer- and nanometer-scale electromechanical systems. The equations of linear thermoelasticity are used to give a simple derivation for thermoelastic damping of small flexural vibrations in thin beams. It is shown that Zener’s well-known approximation by a Lorentzian with a single thermal relaxation time slightly deviates from the exact expression.
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Dimensional considerations in achieving large quality factors for resonant silicon cantilevers in air

TL;DR: In this paper, the authors provide guidelines for designing rectangular silicon cantilever beams to achieve maximum quality factors for the fundamental flexural resonance at atmospheric pressure, which is based on experimental data acquisition of resonance characteristics.
References
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Phd by thesis

TL;DR: In this paper, a sedimentological core and petrographic characterisation of samples from eleven boreholes from the Lower Carboniferous of Bowland Basin (Northwest England) is presented.
Journal ArticleDOI

Thermoelastic damping in micro- and nanomechanical systems

TL;DR: In this paper, the importance of thermoelastic damping as a fundamental dissipation mechanism for small-scale mechanical resonators is evaluated in light of recent efforts to design high-Q micrometer-and nanometer-scale electromechanical systems.
Journal ArticleDOI

Quality factors in micron- and submicron-thick cantilevers

TL;DR: In this article, measurements of the mechanical quality factor Q for arrays of silicon-nitride, polysilicon, and single-crystal silicon cantilevers have been obtained by studying the dependence of Q on cantilever material, geometry, and surface treatments.
Book

Fundamentals of interferometric gravitational wave detectors

TL;DR: The search for gravitational waves the nature of gravitational waves sources of gravitational wave linear systems, signals and noise optical readout noise folded interferometer arms thermal noise seismic noise and vibration isolation design of large interferometers null instruments feedback control systems an interferer as an active null instrument resonant mass gravitational wave detectors detecting gravitational wave signals gravitational wave astronomy prospects
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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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