Silica suspension and coating developments for advanced LIGO

G. Cagnoli, H. Armandula, C.A. Cantley, D.R.M. Crooks, A. Cumming, E. Elliffe, M.M. Fejer, A.M. Gretarsson, G.M. Harry, A. Heptonstall, J. Hough, R. Jones, J.-M. MacKowski, I. Martin, P. Murray, S.D. Penn, M. Perreur-Lloyd, S. Reid, R. Route, S. Rowan & 3 others N.A. Robertson, P.H. Sneddon, K.A. Strain

Research output: Contribution to journalConference Contribution

9 Citations (Scopus)

Abstract

The proposed upgrade to the LIGO detectors to form the Advanced LIGO detector system is intended to incorporate a low thermal noise monolithic fused silica final stage test mass suspension based on developments of the GEO 600 suspension design. This will include fused silica suspension elements jointed to fused silica test mass substrates, to which dielectric mirror coatings are applied. The silica fibres used for GEO 600 were pulled using a Hydrogen-Oxygen flame system. This successful system has some limitations, however, that needed to be overcome for the more demanding suspensions required for Advanced LIGO. To this end a fibre pulling machine based on a CO2 laser as the heating element is being developed in Glasgow with funding from EGO and PPARC. At the moment a significant limitation for proposed detectors like Advanced LIGO is expected to come from the thermal noise of the mirror coatings. An investigation on mechanical losses of silica/tantala coatings was carried out by several labs involved with Advanced LIGO R&D. Doping the tantala coating layer with titania was found to reduce the coating mechanical dissipation. A review of the results is given here.
LanguageEnglish
Pages386-392
Number of pages7
JournalJournal of Physics: Conference Series
Volume32
DOIs
Publication statusPublished - 2006

Fingerprint

LIGO (observatory)
silicon dioxide
coatings
thermal noise
EGO
detectors
mirrors
fibers
pulling
flames
dissipation
titanium
moments
heating
oxygen
hydrogen
lasers

Keywords

  • LIGO
  • silica suspension
  • gravitational waves
  • neutron stars

Cite this

Cagnoli, G., Armandula, H., Cantley, C. A., Crooks, D. R. M., Cumming, A., Elliffe, E., ... Strain, K. A. (2006). Silica suspension and coating developments for advanced LIGO. Journal of Physics: Conference Series , 32, 386-392. https://doi.org/10.1088/1742-6596/32/1/059
Cagnoli, G. ; Armandula, H. ; Cantley, C.A. ; Crooks, D.R.M. ; Cumming, A. ; Elliffe, E. ; Fejer, M.M. ; Gretarsson, A.M. ; Harry, G.M. ; Heptonstall, A. ; Hough, J. ; Jones, R. ; MacKowski, J.-M. ; Martin, I. ; Murray, P. ; Penn, S.D. ; Perreur-Lloyd, M. ; Reid, S. ; Route, R. ; Rowan, S. ; Robertson, N.A. ; Sneddon, P.H. ; Strain, K.A. / Silica suspension and coating developments for advanced LIGO. In: Journal of Physics: Conference Series . 2006 ; Vol. 32. pp. 386-392.
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Cagnoli, G, Armandula, H, Cantley, CA, Crooks, DRM, Cumming, A, Elliffe, E, Fejer, MM, Gretarsson, AM, Harry, GM, Heptonstall, A, Hough, J, Jones, R, MacKowski, J-M, Martin, I, Murray, P, Penn, SD, Perreur-Lloyd, M, Reid, S, Route, R, Rowan, S, Robertson, NA, Sneddon, PH & Strain, KA 2006, 'Silica suspension and coating developments for advanced LIGO' Journal of Physics: Conference Series , vol. 32, pp. 386-392. https://doi.org/10.1088/1742-6596/32/1/059

Silica suspension and coating developments for advanced LIGO. / Cagnoli, G.; Armandula, H.; Cantley, C.A.; Crooks, D.R.M.; Cumming, A.; Elliffe, E.; Fejer, M.M.; Gretarsson, A.M.; Harry, G.M.; Heptonstall, A.; Hough, J.; Jones, R.; MacKowski, J.-M.; Martin, I.; Murray, P.; Penn, S.D.; Perreur-Lloyd, M.; Reid, S.; Route, R.; Rowan, S.; Robertson, N.A.; Sneddon, P.H.; Strain, K.A.

In: Journal of Physics: Conference Series , Vol. 32, 2006, p. 386-392.

Research output: Contribution to journalConference Contribution

TY - JOUR

T1 - Silica suspension and coating developments for advanced LIGO

AU - Cagnoli, G.

AU - Armandula, H.

AU - Cantley, C.A.

AU - Crooks, D.R.M.

AU - Cumming, A.

AU - Elliffe, E.

AU - Fejer, M.M.

AU - Gretarsson, A.M.

AU - Harry, G.M.

AU - Heptonstall, A.

AU - Hough, J.

AU - Jones, R.

AU - MacKowski, J.-M.

AU - Martin, I.

AU - Murray, P.

AU - Penn, S.D.

AU - Perreur-Lloyd, M.

AU - Reid, S.

AU - Route, R.

AU - Rowan, S.

AU - Robertson, N.A.

AU - Sneddon, P.H.

AU - Strain, K.A.

PY - 2006

Y1 - 2006

N2 - The proposed upgrade to the LIGO detectors to form the Advanced LIGO detector system is intended to incorporate a low thermal noise monolithic fused silica final stage test mass suspension based on developments of the GEO 600 suspension design. This will include fused silica suspension elements jointed to fused silica test mass substrates, to which dielectric mirror coatings are applied. The silica fibres used for GEO 600 were pulled using a Hydrogen-Oxygen flame system. This successful system has some limitations, however, that needed to be overcome for the more demanding suspensions required for Advanced LIGO. To this end a fibre pulling machine based on a CO2 laser as the heating element is being developed in Glasgow with funding from EGO and PPARC. At the moment a significant limitation for proposed detectors like Advanced LIGO is expected to come from the thermal noise of the mirror coatings. An investigation on mechanical losses of silica/tantala coatings was carried out by several labs involved with Advanced LIGO R&D. Doping the tantala coating layer with titania was found to reduce the coating mechanical dissipation. A review of the results is given here.

AB - The proposed upgrade to the LIGO detectors to form the Advanced LIGO detector system is intended to incorporate a low thermal noise monolithic fused silica final stage test mass suspension based on developments of the GEO 600 suspension design. This will include fused silica suspension elements jointed to fused silica test mass substrates, to which dielectric mirror coatings are applied. The silica fibres used for GEO 600 were pulled using a Hydrogen-Oxygen flame system. This successful system has some limitations, however, that needed to be overcome for the more demanding suspensions required for Advanced LIGO. To this end a fibre pulling machine based on a CO2 laser as the heating element is being developed in Glasgow with funding from EGO and PPARC. At the moment a significant limitation for proposed detectors like Advanced LIGO is expected to come from the thermal noise of the mirror coatings. An investigation on mechanical losses of silica/tantala coatings was carried out by several labs involved with Advanced LIGO R&D. Doping the tantala coating layer with titania was found to reduce the coating mechanical dissipation. A review of the results is given here.

KW - LIGO

KW - silica suspension

KW - gravitational waves

KW - neutron stars

U2 - 10.1088/1742-6596/32/1/059

DO - 10.1088/1742-6596/32/1/059

M3 - Conference Contribution

VL - 32

SP - 386

EP - 392

JO - Journal of Physics: Conference Series

T2 - Journal of Physics: Conference Series

JF - Journal of Physics: Conference Series

SN - 1742-6588

ER -