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  Automatic beam alignment for the modecleaner cavities of GEO 600

Grote, H., Heinzel, G., Freise, A., Gossler, S., Willke, B., Lück, H., et al. (2004). Automatic beam alignment for the modecleaner cavities of GEO 600. Applied Optics - LPE, 43(9), 1938-1945. doi:10.1364/AO.43.001938.

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Item Permalink: https://hdl.handle.net/11858/00-001M-0000-0013-502E-A Version Permalink: https://hdl.handle.net/11858/00-001M-0000-0013-5030-2
Genre: Journal Article

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 Creators:
Grote, Hartmut1, Author           
Heinzel, Gerhard1, Author           
Freise, Andreas1, 2, Author
Gossler, Stefan1, Author           
Willke, Benno1, Author           
Lück, Harald1, Author           
Ward, Harry, Author
Casey, Morag M., Author
Strain, Kenneth A.1, Author           
Robertson, David, Author
Hough, Jim, Author
Danzmann, Karsten1, Author           
Affiliations:
1Laser Interferometry & Gravitational Wave Astronomy, AEI-Hannover, MPI for Gravitational Physics, Max Planck Society, ou_24010              
2AEI-Hannover, MPI for Gravitational Physics, Max Planck Society, ou_24009              

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 Abstract: The automatic alignment system for the two suspended, triangular mode-cleaner cavities of the gravitational wave detector GEO 600 has been in continuous operation since the spring of 2001. A total of 20 angular degrees of freedom are controlled by feedback loops with almost no manual alignment having been required since installation. Error signals for the eight most important degrees of freedom are obtained with the differential wave-front sensing technique. We describe the sensing system, the control topology, and the performance of the automatic alignment system. A continuous locking stretch of more than 120 h has been achieved.

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Language(s): eng - English
 Dates: 2004-03-20
 Publication Status: Issued
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 Identifiers: eDoc: 119940
DOI: 10.1364/AO.43.001938
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Title: Applied Optics - LPE
Source Genre: Journal
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Pages: - Volume / Issue: 43 (9) Sequence Number: - Start / End Page: 1938 - 1945 Identifier: -