Details
| Originalsprache | Englisch |
|---|---|
| Aufsatznummer | 151102 |
| Fachzeitschrift | Physical review letters |
| Jahrgang | 118 |
| Ausgabenummer | 15 |
| Publikationsstatus | Veröffentlicht - 14 Apr. 2017 |
Abstract
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 electrostatic actuation, with a resulting decay time constant of 23 sec. An average control force of 0.03 nN was required to maintain the acoustic mode at its minimum amplitude.
ASJC Scopus Sachgebiete
- Physik und Astronomie (insg.)
- Allgemeine Physik und Astronomie
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in: Physical review letters, Jahrgang 118, Nr. 15, 151102, 14.04.2017.
Publikation: Beitrag in Fachzeitschrift › Artikel › Forschung › Peer-Review
}
TY - JOUR
T1 - First Demonstration of Electrostatic Damping of Parametric Instability at Advanced LIGO
AU - LSC Collaboration
AU - Blair, Carl
AU - Gras, Slawek
AU - Abbott, Richard
AU - Aston, Stuart
AU - Betzwieser, Joseph
AU - Blair, David
AU - Derosa, Ryan
AU - Evans, Matthew
AU - Frolov, Valera
AU - Fritschel, Peter
AU - Grote, Hartmut
AU - Hardwick, Terra
AU - Liu, Jian
AU - Lormand, Marc
AU - Miller, John
AU - Mullavey, Adam
AU - O'Reilly, Brian
AU - Zhao, Chunnong
AU - Abbott, B. P.
AU - Abbott, T. D.
AU - Adams, C.
AU - Adhikari, R. X.
AU - Anderson, S. B.
AU - Ananyeva, A.
AU - Appert, S.
AU - Arai, K.
AU - Ballmer, S. W.
AU - Barker, D.
AU - Barr, B.
AU - Barsotti, L.
AU - Bartlett, J.
AU - Bartos, I.
AU - Batch, J. C.
AU - Bell, A. S.
AU - Billingsley, G.
AU - Birch, J.
AU - Biscans, S.
AU - Biwer, C.
AU - Bork, R.
AU - Brooks, A. F.
AU - Ciani, G.
AU - Clara, F.
AU - Countryman, S. T.
AU - Cowart, M. J.
AU - Coyne, D. C.
AU - Cumming, A.
AU - Cunningham, L.
AU - Danzmann, K.
AU - Willke, B.
AU - Zhang, L.
N1 - Funding Information: The authors acknowledge the entire LIGO Scientific Collaboration for their wide ranging expertise and contributions. LIGO was constructed by the California Institute of Technology and Massachusetts Institute of Technology with funding from the National Science Foundation, and it operates under Cooperative Agreement No.PHY-0757058. Advanced LIGO was built under Grant No.PHY-0823459. C.B. was supported by the Australian Research Council and the LSC fellows program.
PY - 2017/4/14
Y1 - 2017/4/14
N2 - 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 electrostatic actuation, with a resulting decay time constant of 23 sec. An average control force of 0.03 nN was required to maintain the acoustic mode at its minimum amplitude.
AB - 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 electrostatic actuation, with a resulting decay time constant of 23 sec. An average control force of 0.03 nN was required to maintain the acoustic mode at its minimum amplitude.
UR - http://www.scopus.com/inward/record.url?scp=85017409392&partnerID=8YFLogxK
U2 - 10.1103/PhysRevLett.118.151102
DO - 10.1103/PhysRevLett.118.151102
M3 - Article
C2 - 28452534
AN - SCOPUS:85017409392
VL - 118
JO - Physical review letters
JF - Physical review letters
SN - 0031-9007
IS - 15
M1 - 151102
ER -