Hydroxide-catalysis bonding for stable optical systems for space

Elliffe, E. J.; Bogenstahl, J.; Deshpande, A.; Hough, J.; Killow, C. J.; Reid, S.; Robertson, D. I.; Rowan, S.; Ward, H.; Cagnoli, G.

doi:10.1088/0264-9381/22/10/018

Cited by 135 publications

(161 citation statements)

References 10 publications

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“…where the N p × N p matrix η is given by We give here as an example the results of this procedure when applied to the parameters in (9). The system is stimulated with two independent signals o iSC and o i whose characteristics are shown in table 1.…”

Section: The Measurement Of Dynamical Parametersmentioning

confidence: 99%

LISA Pathfinder: the experiment and the route to LISA

Armano¹,

Benedetti²,

Bogenstahl³

et al. 2009

Class. Quantum Grav.

Self Cite

116

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LISA Pathfinder (LPF) is a science and technology demonstrator planned by the European Space Agency in view of the LISA mission. As a scientific payload, the LISA Technology Package on board LPF will be the most precise geodesics explorer flown as of today, both in terms of displacement and acceleration sensitivity. The challenges embodied by LPF make it a unique mission, paving the way towards the space-borne detection of gravitational waves with LISA. This paper summarizes the basics of LPF, and the progress made in preparing its effective implementation in flight. We hereby give an overview of the experiment philosophy and assumptions to carry on the measurement. We report on the mission plan and hardware design advances and on the progress on detailing measurements and operations. Some light will be shed on the related data processing algorithms. In particular, we show how to single out the acceleration noise from the spacecraft motion perturbations, how to account for dynamical deformation parameters distorting the measurement reference and how to decouple the actuation noise via parabolic free flight.

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Section: The Measurement Of Dynamical Parametersmentioning

confidence: 99%

LISA Pathfinder: the experiment and the route to LISA

Armano¹,

Benedetti²,

Bogenstahl³

et al. 2009

Class. Quantum Grav.

Self Cite

116

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“…It has been found that after four weeks of curing they have reached their maximum strength [15,17,23]. Investigations were carried out to determine whether heating bonded samples could aid the evaporation or diffusion of additional water and hence further improve bond mechanical loss.…”

Section: Mechanical Loss Of a Hydroxide Catalysis Bondmentioning

confidence: 99%

“…The strength of hydroxide catalysis bonds between different materials such as fused silica, silicon, sapphire, ULE and zerodur have been studied previously [17,20,[31][32][33][34][35][36][37]. A summary of most of the results can be found in Ref.…”

Section: Strength Testingmentioning

confidence: 99%

“…This bonding process is used to join surfaces through a hydroxide catalysed hydration and dehydration reaction [11,12]. It was first developed for use in the Gravity Probe B mission [13,14] and has been further developed for both ground and space based gravitational wave detectors [15][16][17][18]. Although the mechanical loss of a hydroxide catalysis bond is higher than that of bulk silica, it is at an acceptable level for advanced detector suspensions since the bond layer can be extremely thin (< 100 nm) [19,20].…”

Section: Introductionmentioning

confidence: 99%

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Effect of heat treatment and aging on the mechanical loss and strength of hydroxide catalysis bonds between fused silica samples

et al. 2017

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Hydroxide catalysis bonds are used in the aLIGO gravitational wave detectors and are an essential technology within the mirror suspensions which allowed for detector sensitivities to be reached that enabled the first direct detections of gravitational waves. Methods aimed at further improving hydroxide catalysis bonds for future upgrades to these detectors, in order to increase detection rates and the number of detectable sources, are explored. Also, the effect on the bonds of an aLIGO suspension construction procedure involving heat, the fibre welding process, is investigated. Here we show that thermal treatments can be beneficial to improving some of the bond properties important to the mirror suspensions in interferometric gravitational wave detectors. It was found that heat treating bonds at 150 • C increases bond strength by a factor of approximately 1.5 and a combination of bond ageing and heat treatment of the optics at 150 • C reduces the mechanical loss of a bond from 0.10 to 0.05. It is also shown that current construction procedures do not reduce bond strength.

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“…This technique was first created by Gwo for use in the Gravity Probe B satellite [36][37][38]. It has since been further developed for use in the construction of ground-and space-based gravitational wave detectors [13,32,33,[39][40][41].…”

Section: Hydroxide Catalysis Bondingmentioning

confidence: 99%

Mechanical loss of a hydroxide catalysis bond between sapphire substrates and its effect on the sensitivity of future gravitational wave detectors

et al. 2016

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Mechanical loss of a hydroxide catalysis bond between sapphire substrates and its effect on the sensitivity of future gravitational wave detectors. Physical Review D, 94(8), 082003. (doi:10.1103/PhysRevD.94.082003) This is the author's final accepted version.There may be differences between this version and the published version. Hydroxide catalysis bonds are low mechanical loss joints which are used in the fused silica mirror suspensions of current room temperature interferometric gravitational wave detectors, one of the techniques which was essential to allow the recent detection of gravitational radiation by LIGO. More sensitive detectors may require cryogenic techniques with sapphire as a candidate mirror and suspension material and thus hydroxide catalysis bonds are under consideration for jointing sapphire. This paper presents the first measurements of the mechanical loss of such a bond created between sapphire substrates and measured down to cryogenic temperatures. The mechanical loss is found to be 0.03 ± 0.01 at room temperature, decreasing to (3 ± 1) × 10 −4 at 20 K. The resulting thermal noise of the bonds on several possible mirror suspensions is presented.

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Hydroxide-catalysis bonding for stable optical systems for space

Cited by 135 publications

References 10 publications

LISA Pathfinder: the experiment and the route to LISA

LISA Pathfinder: the experiment and the route to LISA

Effect of heat treatment and aging on the mechanical loss and strength of hydroxide catalysis bonds between fused silica samples

Mechanical loss of a hydroxide catalysis bond between sapphire substrates and its effect on the sensitivity of future gravitational wave detectors

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