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  The output mode cleaner of GEO 600

Prijatelj, M., Degallaix, J., Grote, H., Leong, J., Affeldt, C., Hild, S., et al. (2012). The output mode cleaner of GEO 600. Classical and quantum gravity, 29(5): 055009. doi:10.1088/0264-9381/29/5/055009.

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CQG_29_5_055009.pdf (beliebiger Volltext), 912KB
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Prijatelj, M.1, Autor           
Degallaix, J.1, Autor           
Grote, H.1, Autor           
Leong, J.2, Autor           
Affeldt, C.1, Autor           
Hild, S.1, Autor           
Luck, H.1, Autor           
Slutsky, J.1, Autor
Wittel, H.1, Autor           
Strain, K. A.1, Autor           
Danzmann, K.1, Autor           
Affiliations:
1Laser Interferometry & Gravitational Wave Astronomy, AEI-Hannover, MPI for Gravitational Physics, Max Planck Society, ou_24010              
2Observational Relativity and Cosmology, AEI-Hannover, MPI for Gravitational Physics, Max Planck Society, ou_24011              

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 Zusammenfassung: The German–British interferometric gravitational wave detector GEO 600 is currently undergoing upgrades within the GEO-HF upgrade program. The goal of this program is to enhance the sensitivity of GEO 600, in particular at frequencies above 500 Hz. At these frequencies, the detector is limited by shot noise. An important element of the upgrade is the implementation of an output mode cleaner (OMC). This filtering cavity suppresses higher order spatial and temporal modes in the interferometer's output beam, thereby reducing the shot noise and enhancing sensitivity. Fully automated lock acquisition for the OMC was developed in order to ensure a high duty cycle of GEO 600. To maintain optimum sensitivity, the resonance condition of the OMC must be matched to the output beam from the interferometer. This requires continuous control of the resonance frequency of the OMC to the light, and alignment of the beam to the OMC. We describe the design and implementation of the OMC with special attention to the control techniques employed. We present results from the experience gained during the S6/VSR3 science run. Furthermore, we describe an upper limit measurement of the internal displacement noise of a piezoelectric actuator.

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 Datum: 2012
 Publikationsstatus: Erschienen
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 Identifikatoren: DOI: 10.1088/0264-9381/29/5/055009
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Titel: Classical and quantum gravity
Genre der Quelle: Zeitschrift
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Ort, Verlag, Ausgabe: Bristol, U.K. : Institute of Physics
Seiten: - Band / Heft: 29 (5) Artikelnummer: 055009 Start- / Endseite: - Identifikator: ISSN: 0264-9381
CoNE: https://pure.mpg.de/cone/journals/resource/954925513480_1