Update on quadruple suspension design for advanced LIGO

S. M. Aston; C. A. Cantley; LIGO Scientific Collaboration

doi:10.1088/0264-9381/29/23/235004

Update on quadruple suspension design for advanced LIGO

S. M. Aston, C. A. Cantley, LIGO Scientific Collaboration

Research output: Contribution to journal › Article › peer-review

136 Citations (Scopus)

Abstract

We describe the design of the suspension systems for the major optics for Advanced LIGO, the upgrade to LIGO-the Laser Interferometric Gravitational-Wave Observatory. The design is based on that used in GEO600-the German/UK interferometric gravitational wave detector, with further development to meet the more stringent noise requirements for Advanced LIGO. The test mass suspensions consist of a four-stage or quadruple pendulum for enhanced seismic isolation. To minimize suspension thermal noise, the final stage consists of a silica mirror, 40 kg in mass, suspended from another silica mass by four silica fibres welded to silica ears attached to the sides of the masses using hydroxide-catalysis bonding. The design is chosen to achieve a displacement noise level for each of the seismic and thermal noise contributions of 10(-19) m/root Hz at 10 Hz, for each test mass. We discuss features of the design which has been developed as a result of experience with prototypes and associated investigations.

Original language	English
Article number	235004
Number of pages	26
Journal	Classical and Quantum Gravity
Volume	29
Issue number	23
Early online date	22 Oct 2012
DOIs	https://doi.org/10.1088/0264-9381/29/23/235004
Publication status	Published - 7 Dec 2012

Keywords

gravitational waves
seismology
LIGO scientific collaboration

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10.1088/0264-9381/29/23/235004

Cite this

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title = "Update on quadruple suspension design for advanced LIGO",

abstract = "We describe the design of the suspension systems for the major optics for Advanced LIGO, the upgrade to LIGO-the Laser Interferometric Gravitational-Wave Observatory. The design is based on that used in GEO600-the German/UK interferometric gravitational wave detector, with further development to meet the more stringent noise requirements for Advanced LIGO. The test mass suspensions consist of a four-stage or quadruple pendulum for enhanced seismic isolation. To minimize suspension thermal noise, the final stage consists of a silica mirror, 40 kg in mass, suspended from another silica mass by four silica fibres welded to silica ears attached to the sides of the masses using hydroxide-catalysis bonding. The design is chosen to achieve a displacement noise level for each of the seismic and thermal noise contributions of 10(-19) m/root Hz at 10 Hz, for each test mass. We discuss features of the design which has been developed as a result of experience with prototypes and associated investigations.",

keywords = "gravitational waves, seismology, LIGO scientific collaboration",

author = "Aston, {S. M.} and Cantley, {C. A.} and Lockerbie, {N. A.} and Tokmakov, {K. V.} and {LIGO Scientific Collaboration}",

note = "S M Aston et al 2012 Class. Quantum Grav. 29 235004. {\textcopyright}2012 IOP Publishing Ltd",

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T1 - Update on quadruple suspension design for advanced LIGO

AU - Aston, S. M.

AU - Cantley, C. A.

AU - Lockerbie, N. A.

AU - Tokmakov, K. V.

AU - LIGO Scientific Collaboration

PY - 2012/12/7

Y1 - 2012/12/7

N2 - We describe the design of the suspension systems for the major optics for Advanced LIGO, the upgrade to LIGO-the Laser Interferometric Gravitational-Wave Observatory. The design is based on that used in GEO600-the German/UK interferometric gravitational wave detector, with further development to meet the more stringent noise requirements for Advanced LIGO. The test mass suspensions consist of a four-stage or quadruple pendulum for enhanced seismic isolation. To minimize suspension thermal noise, the final stage consists of a silica mirror, 40 kg in mass, suspended from another silica mass by four silica fibres welded to silica ears attached to the sides of the masses using hydroxide-catalysis bonding. The design is chosen to achieve a displacement noise level for each of the seismic and thermal noise contributions of 10(-19) m/root Hz at 10 Hz, for each test mass. We discuss features of the design which has been developed as a result of experience with prototypes and associated investigations.

AB - We describe the design of the suspension systems for the major optics for Advanced LIGO, the upgrade to LIGO-the Laser Interferometric Gravitational-Wave Observatory. The design is based on that used in GEO600-the German/UK interferometric gravitational wave detector, with further development to meet the more stringent noise requirements for Advanced LIGO. The test mass suspensions consist of a four-stage or quadruple pendulum for enhanced seismic isolation. To minimize suspension thermal noise, the final stage consists of a silica mirror, 40 kg in mass, suspended from another silica mass by four silica fibres welded to silica ears attached to the sides of the masses using hydroxide-catalysis bonding. The design is chosen to achieve a displacement noise level for each of the seismic and thermal noise contributions of 10(-19) m/root Hz at 10 Hz, for each test mass. We discuss features of the design which has been developed as a result of experience with prototypes and associated investigations.

KW - gravitational waves

KW - seismology

KW - LIGO scientific collaboration

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DO - 10.1088/0264-9381/29/23/235004

M3 - Article

SN - 0264-9381

VL - 29

JO - Classical and Quantum Gravity

JF - Classical and Quantum Gravity

IS - 23

M1 - 235004

ER -

Update on quadruple suspension design for advanced LIGO

Abstract

Keywords

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