Quasi-monolithic mirror suspensions in ground-based gravitational-wave detectors: an overview and look to the future

Veggel, A. A. van

doi:10.1098/rsta.2017.0281

Cited by 4 publications

(3 citation statements)

References 81 publications

(98 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…However, optical absorption increases the test-mass temperature. In vacuum and at low temperature, the only option to cool the test masses is through the very thin mirror suspensions [34]. Therefore, optical absorption has to be minimized to maintain the low temperature of the test masses.…”

Section: (E) Optical Absorptionmentioning

confidence: 99%

Development of mirror coatings for gravitational-wave detectors

Steinlechner

2018

Phil. Trans. R. Soc. A.

View full text Add to dashboard Cite

Gravitational waves are detected by measuring length changes between mirrors in the arms of kilometre-long Michelson interferometers. Brownian thermal noise arising from thermal vibrations of the mirrors can limit the sensitivity to distance changes between the mirrors, and, therefore, the ability to measure gravitational-wave signals. Thermal noise arising from the highly reflective mirror coatings will limit the sensitivity both of current detectors (when they reach design performance) and of planned future detectors. Therefore, the development of coatings with low thermal noise, which at the same time meet strict optical requirements, is of great importance. This article gives an overview of the current status of coatings and of the different approaches for coating improvement.This article is part of a discussion meeting issue 'The promises of gravitational-wave astronomy'.

show abstract

Section: (E) Optical Absorptionmentioning

confidence: 99%

Development of mirror coatings for gravitational-wave detectors

Steinlechner

2018

Phil. Trans. R. Soc. A.

View full text Add to dashboard Cite

show abstract

“…The HCB technique, proposed by Gwo for the Gravity Probe B telescope [13][14][15], has been used in Virgo, GEO 600 and LIGO projects to joint fused silica [16][17][18][19][20] and is now used in Advance LIGO, and Advanced Virgo [1,2]. Currently this bonding method is chosen to bond the sapphire parts in KAGRA for cryogenic temperature detection [11].…”

Section: Introductionmentioning

confidence: 99%

A hybrid silicon-sapphire cryogenic Fabry–Perot cavity using hydroxide catalysis bonding

Sun

Shi

et al. 2019

Class. Quantum Grav.

View full text Add to dashboard Cite

The third-generation gravitational wave detectors are under development by operating the detector in cryogenic temperature to reduce the thermal noise. Silicon and sapphire are promising candidate materials for the test masses and suspension elements due to their remarkable mechanical and thermal properties at cryogenic temperature. Here we present the performances of the cryogenic thermal cycling and strength testing on hydroxide catalysis bonding between sapphire and silicon. Our results suggest that although these two materials have very different coefficients of thermal expansion, but if the flatness and the thermally grown SiO 2 oxidation layer on the silicon surface are controlled well, the bonded samples can still survive thermal cycling from room temperature to 5.5 K. A breaking strength of 3.6±0.6 MPa is measured for the bonds between sapphire and silicon with a 190 nm silicon oxidation thickness after cooling cycle. We construct a hybrid sapphire-silicon Fabry-Perot cavity with the developing bonding technique in our lab. The measurement results reveal that the cavity can survive repeated thermal cycling while maintaining a good finesse.

show abstract

“…One of the key contributions from the UK to the aLIGO detectors was the fused silica fibres used to suspend the detector mirrors. This contribution, and the development of enhanced suspensions to enable the construction of future detectors, is discussed by van Veggel [21].…”

mentioning

confidence: 99%