Design and development of the advanced LIGO monolithic fused silica suspension

被引：91

作者：

Cumming, A. V. ^{[1
]}

Bell, A. S. ^{[1
]}

Barsotti, L. ^{[2
]}

Barton, M. A. ^{[3
]}

Cagnoli, G. ^{[4
]}

Cook, D. ^{[3
]}

Cunningham, L. ^{[1
]}

Evans, M. ^{[2
]}

Hammond, G. D. ^{[1
]}

Harry, G. M. ^{[2
]}

Heptonstall, A. ^{[5
]}

Hough, J. ^{[1
]}

Jones, R. ^{[1
]}

Kumar, R. ^{[1
]}

Mittleman, R. ^{[2
]}

Robertson, N. A. ^{[1
,5
]}

Rowan, S. ^{[1
]}

Shapiro, B. ^{[2
]}

Strain, K. A. ^{[1
]}

Tokmakov, K. ^{[6
]}

Torrie, C. ^{[1
,5
]}

van Veggel, A. A. ^{[1
]}

机构：

[1] Univ Glasgow, Scottish Univ Phys Alliance, Inst Gravitat Res, Sch Phys & Astron, Glasgow G12 8QQ, Lanark, Scotland

[2] MIT, LIGO Lab, Cambridge, MA 02139 USA

[3] Hanford Observ, LIGO Lab, Richland, WA 99352 USA

[4] Univ Texas Brownsville, Dept Phys & Astron, Brownsville, TX 78526 USA

[5] CALTECH, LIGO Lab, Pasadena, CA 91125 USA

[6] Univ Strathclyde, Scottish Univ Phys Alliance, Dept Phys, Glasgow G4 0NG, Lanark, Scotland

来源：

CLASSICAL AND QUANTUM GRAVITY | 2012年 / 29卷 / 03期

基金：

英国科学技术设施理事会; 美国国家科学基金会;

关键词：

TEST MASS SUSPENSION; QUALITY FACTOR; THERMAL NOISE; MECHANICAL LOSS; DISSIPATION; FREQUENCY; STRENGTH; PENDULUM; ENERGY;

D O I：

10.1088/0264-9381/29/3/035003

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

The detection of gravitational waves remains one of the most challenging prospects faced by experimental physicists. One of the most significant limits to the sensitivity of current, and future, long-baseline interferometric gravitational wave detectors is thermal displacement noise of the test masses and their suspensions. Suspension thermal noise will be an important noise source at operating frequencies between approximately 10 and 30 Hz, and it results from a combination of thermoelastic damping, surface loss and bulk loss associated with the suspension fibres, and weld loss from their attachment. Its effects can be reduced by minimizing thermoelastic loss and optimizing pendulum dilution factor via the appropriate choice of geometry of the suspension fibre and attachment geometry. This paper will discuss the design and fabrication of a prototype of the fused silica suspension stage for use in the advanced LIGO (aLIGO) detector network, analysing in detail the design of the fused silica attachment pieces (ears), together with the suspension assembly techniques. We also present a full thermal noise analysis of the prototype suspension, taking into account for the first time the precise shape of the actual fibres used, and weld loss. We shall demonstrate the suitability of this suspension for installation into aLIGO.

引用

页数：18

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