Apparatus for dimensional characterization of fused silica fibers for the suspensions of advanced gravitational wave detectors

A. Cumming; R. Jones; M. Barton; G. Cagnoli; C.A. Cantley; D.R.M. Crooks; G.D. Hammond; A. Heptonstall; J. Hough; S. Rowan; K.A. Strain

doi:10.1063/1.3581228

Apparatus for dimensional characterization of fused silica fibers for the suspensions of advanced gravitational wave detectors

A. Cumming, R. Jones, M. Barton, G. Cagnoli, C.A. Cantley, D.R.M. Crooks, G.D. Hammond, A. Heptonstall, J. Hough, S. Rowan, K.A. Strain

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Abstract

Detection of gravitational waves from astrophysical sources remains one of the most challenging problems faced by experimental physicists. A significant limit to the sensitivity of future long-baseline interferometric gravitational wave detectors is thermal displacement noise of the test mass mirrors and their suspensions. Suspension thermal noise results from mechanical dissipation in the fused silica suspension fibers suspending the test mass mirrors and is therefore an important noise source at operating frequencies between ∼10 and 30 Hz. This dissipation occurs due to a combination of thermoelastic damping, surface and bulk losses. Its effects can be reduced by optimizing the thermoelastic and surface loss, and these parameters are a function of the cross sectional dimensions of the fiber along its length. This paper presents a new apparatus capable of high resolution measurements of the cross sectional dimensions of suspension fibers of both rectangular and circular cross section, suitable for use in advanced detector mirror suspensions.

Original language	English
Article number	044502
Number of pages	7
Journal	Review of Scientific Instruments
Volume	82
Issue number	4
DOIs	https://doi.org/10.1063/1.3581228
Publication status	Published - 30 Apr 2011

Keywords

gravitational waves
gravitational wave detection
interferometers
fused silica suspension fiber

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Cumming-etal-RSI-2011-fused-silica-fibers-for-suspensions-of-advanced-gravitational-wave-detectorsFinal published version, 498 KB

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Cumming, A., Jones, R., Barton, M., Cagnoli, G., Cantley, C. A., Crooks, D. R. M., Hammond, G. D., Heptonstall, A., Hough, J., Rowan, S., & Strain, K. A. (2011). Apparatus for dimensional characterization of fused silica fibers for the suspensions of advanced gravitational wave detectors. Review of Scientific Instruments, 82(4), [044502]. https://doi.org/10.1063/1.3581228

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abstract = "Detection of gravitational waves from astrophysical sources remains one of the most challenging problems faced by experimental physicists. A significant limit to the sensitivity of future long-baseline interferometric gravitational wave detectors is thermal displacement noise of the test mass mirrors and their suspensions. Suspension thermal noise results from mechanical dissipation in the fused silica suspension fibers suspending the test mass mirrors and is therefore an important noise source at operating frequencies between ∼10 and 30 Hz. This dissipation occurs due to a combination of thermoelastic damping, surface and bulk losses. Its effects can be reduced by optimizing the thermoelastic and surface loss, and these parameters are a function of the cross sectional dimensions of the fiber along its length. This paper presents a new apparatus capable of high resolution measurements of the cross sectional dimensions of suspension fibers of both rectangular and circular cross section, suitable for use in advanced detector mirror suspensions.",

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AU - Cumming, A.

AU - Jones, R.

AU - Barton, M.

AU - Cagnoli, G.

AU - Cantley, C.A.

AU - Crooks, D.R.M.

AU - Hammond, G.D.

AU - Heptonstall, A.

AU - Hough, J.

AU - Rowan, S.

AU - Strain, K.A.

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N2 - Detection of gravitational waves from astrophysical sources remains one of the most challenging problems faced by experimental physicists. A significant limit to the sensitivity of future long-baseline interferometric gravitational wave detectors is thermal displacement noise of the test mass mirrors and their suspensions. Suspension thermal noise results from mechanical dissipation in the fused silica suspension fibers suspending the test mass mirrors and is therefore an important noise source at operating frequencies between ∼10 and 30 Hz. This dissipation occurs due to a combination of thermoelastic damping, surface and bulk losses. Its effects can be reduced by optimizing the thermoelastic and surface loss, and these parameters are a function of the cross sectional dimensions of the fiber along its length. This paper presents a new apparatus capable of high resolution measurements of the cross sectional dimensions of suspension fibers of both rectangular and circular cross section, suitable for use in advanced detector mirror suspensions.

AB - Detection of gravitational waves from astrophysical sources remains one of the most challenging problems faced by experimental physicists. A significant limit to the sensitivity of future long-baseline interferometric gravitational wave detectors is thermal displacement noise of the test mass mirrors and their suspensions. Suspension thermal noise results from mechanical dissipation in the fused silica suspension fibers suspending the test mass mirrors and is therefore an important noise source at operating frequencies between ∼10 and 30 Hz. This dissipation occurs due to a combination of thermoelastic damping, surface and bulk losses. Its effects can be reduced by optimizing the thermoelastic and surface loss, and these parameters are a function of the cross sectional dimensions of the fiber along its length. This paper presents a new apparatus capable of high resolution measurements of the cross sectional dimensions of suspension fibers of both rectangular and circular cross section, suitable for use in advanced detector mirror suspensions.

KW - gravitational waves

KW - gravitational wave detection

KW - interferometers

KW - fused silica suspension fiber

U2 - 10.1063/1.3581228

DO - 10.1063/1.3581228

M3 - Article

SN - 0034-6748

VL - 82

JO - Review of Scientific Instruments

JF - Review of Scientific Instruments

IS - 4

M1 - 044502

ER -

Apparatus for dimensional characterization of fused silica fibers for the suspensions of advanced gravitational wave detectors

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Keywords

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