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  First Demonstration of Electrostatic Damping of Parametric Instability at Advanced LIGO

Blair, C., Gras, S., Abbott, R., Aston, S., Betzwieser, J., Blair, D., et al. (2017). First Demonstration of Electrostatic Damping of Parametric Instability at Advanced LIGO. Physical Review Letters, 118: 151102. doi:10.1103/PhysRevLett.118.151102.

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Datensatz-Permalink: http://hdl.handle.net/11858/00-001M-0000-002D-4918-5 Versions-Permalink: http://hdl.handle.net/11858/00-001M-0000-002E-106A-5
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1611.08997.pdf (Preprint), 520KB
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File downloaded from arXiv at 2017-05-18 10:05
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PRL118.151102.pdf (Verlagsversion), 2MB
 
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American Physical Society
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 Urheber:
Blair, Carl, Autor
Gras, Slawek, Autor
Abbott, Richard, Autor
Aston, Stuart, Autor
Betzwieser, Joseph, Autor
Blair, David, Autor
DeRosa, Ryan, Autor
Evans, Matthew, Autor
Frolov, Valera, Autor
Fritschel, Peter, Autor
Grote, Hartmut1, Autor              
Hardwick, Terra, Autor
Liu, Jian, Autor
Lormand, Marc, Autor
Miller, John, Autor
Mullavey, Adam, Autor
O'Reilly, Brian, Autor
Zhao, Chunnong, Autor
Authors, LSC Instrument, Autor
Affiliations:
1Laser Interferometry & Gravitational Wave Astronomy, AEI-Hannover, MPI for Gravitational Physics, Max Planck Society, escidoc:24010              

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Schlagwörter: Physics, Instrumentation and Detectors, physics.ins-det, Astrophysics, Instrumentation and Methods for Astrophysics, astro-ph.IM, Physics, Optics, physics.optics
 Zusammenfassung: Interferometric gravitational wave detectors operate with high optical power in their arms in order to achieve high shot-noise limited strain sensitivity. A significant limitation to increasing the optical power is the phenomenon of three-mode parametric instabilities, in which the laser field in the arm cavities is scattered into higher order optical modes by acoustic modes of the cavity mirrors. The optical modes can further drive the acoustic modes via radiation pressure, potentially producing an exponential buildup. One proposed technique to stabilize parametric instability is active damping of acoustic modes. We report here the first demonstration of damping a parametrically unstable mode using active feedback forces on the cavity mirror. A 15,538 Hz mode that grew exponentially with a time constant of 182 sec was damped using electro-static actuation, with a resulting decay time constant of 23 sec. An average control force of 0.03 nNrms was required to maintain the acoustic mode at its minimum amplitude.

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 Datum: 2016-11-282017
 Publikationsstatus: Im Druck publiziert
 Seiten: 6 pages, 5 figures
 Ort, Verlag, Ausgabe: -
 Inhaltsverzeichnis: -
 Art der Begutachtung: -
 Identifikatoren: arXiv: 1611.08997
DOI: 10.1103/PhysRevLett.118.151102
URI: http://arxiv.org/abs/1611.08997
 Art des Abschluß: -

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Titel: Physical Review Letters
  Kurztitel : Phys. Rev. Lett.
Genre der Quelle: Zeitschrift
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Ort, Verlag, Ausgabe: Woodbury, N.Y. : American Physical Society
Seiten: - Band / Heft: 118 Artikelnummer: 151102 Start- / Endseite: - Identifikator: ISSN: 0031-9007
CoNE: http://pubman.mpdl.mpg.de/cone/journals/resource/954925433406_1