Point absorbers in Advanced LIGO
Small, highly absorbing points are randomly present on the surfaces of the main interferometer optics in Advanced LIGO. The resulting nano-meter scale thermo-elastic deformations and substrate lenses from these micron-scale absorbers significantly reduces the sensitivity of the interferometer dir...
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| Other Authors: | |
| Format: | Article |
| Language: | English |
| Published: |
The Optical Society
2022
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| Online Access: | https://hdl.handle.net/1721.1/142168 |
| _version_ | 1811090643951288320 |
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| author | Mavalvala, Nergis |
| author2 | LIGO (Observatory : Massachusetts Institute of Technology) |
| author_facet | LIGO (Observatory : Massachusetts Institute of Technology) Mavalvala, Nergis |
| author_sort | Mavalvala, Nergis |
| collection | MIT |
| description | Small, highly absorbing points are randomly present on the surfaces of the
main interferometer optics in Advanced LIGO. The resulting nano-meter scale
thermo-elastic deformations and substrate lenses from these micron-scale
absorbers significantly reduces the sensitivity of the interferometer directly
though a reduction in the power-recycling gain and indirect interactions with
the feedback control system. We review the expected surface deformation from
point absorbers and provide a pedagogical description of the impact on power
build-up in second generation gravitational wave detectors (dual-recycled
Fabry-Perot Michelson interferometers). This analysis predicts that the
power-dependent reduction in interferometer performance will significantly
degrade maximum stored power by up to 50% and hence, limit GW sensitivity, but
suggests system wide corrections that can be implemented in current and future
GW detectors. This is particularly pressing given that future GW detectors call
for an order of magnitude more stored power than currently used in Advanced
LIGO in Observing Run 3. We briefly review strategies to mitigate the effects
of point absorbers in current and future GW wave detectors to maximize the
success of these enterprises. |
| first_indexed | 2024-09-23T14:49:35Z |
| format | Article |
| id | mit-1721.1/142168 |
| institution | Massachusetts Institute of Technology |
| language | English |
| last_indexed | 2024-09-23T14:49:35Z |
| publishDate | 2022 |
| publisher | The Optical Society |
| record_format | dspace |
| spelling | mit-1721.1/1421682023-04-20T19:36:14Z Point absorbers in Advanced LIGO Mavalvala, Nergis LIGO (Observatory : Massachusetts Institute of Technology) Small, highly absorbing points are randomly present on the surfaces of the main interferometer optics in Advanced LIGO. The resulting nano-meter scale thermo-elastic deformations and substrate lenses from these micron-scale absorbers significantly reduces the sensitivity of the interferometer directly though a reduction in the power-recycling gain and indirect interactions with the feedback control system. We review the expected surface deformation from point absorbers and provide a pedagogical description of the impact on power build-up in second generation gravitational wave detectors (dual-recycled Fabry-Perot Michelson interferometers). This analysis predicts that the power-dependent reduction in interferometer performance will significantly degrade maximum stored power by up to 50% and hence, limit GW sensitivity, but suggests system wide corrections that can be implemented in current and future GW detectors. This is particularly pressing given that future GW detectors call for an order of magnitude more stored power than currently used in Advanced LIGO in Observing Run 3. We briefly review strategies to mitigate the effects of point absorbers in current and future GW wave detectors to maximize the success of these enterprises. 2022-04-28T13:12:52Z 2022-04-28T13:12:52Z 2021 2022-04-28T13:05:11Z Article http://purl.org/eprint/type/JournalArticle https://hdl.handle.net/1721.1/142168 Mavalvala, Nergis. 2021. "Point absorbers in Advanced LIGO." Applied Optics, 60 (13). en 10.1364/AO.419689 Applied Optics Attribution-NonCommercial-ShareAlike 4.0 International https://creativecommons.org/licenses/by-nc-sa/4.0/ application/pdf The Optical Society arXiv |
| spellingShingle | Mavalvala, Nergis Point absorbers in Advanced LIGO |
| title | Point absorbers in Advanced LIGO |
| title_full | Point absorbers in Advanced LIGO |
| title_fullStr | Point absorbers in Advanced LIGO |
| title_full_unstemmed | Point absorbers in Advanced LIGO |
| title_short | Point absorbers in Advanced LIGO |
| title_sort | point absorbers in advanced ligo |
| url | https://hdl.handle.net/1721.1/142168 |
| work_keys_str_mv | AT mavalvalanergis pointabsorbersinadvancedligo |