Alignment control of GEO 600

Details Alignment control of GEO 600 Alignment control of GEO 600

Mar 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004cqgra..21s.441g&link_type=abstract

Classical and Quantum Gravity, Volume 21, Issue 5, pp. S441-S449 (2004).

Physics

6

Scientific paper

We give an overview of the automatic mirror alignment system of the gravitational wave detector GEO 600. In order to achieve the required sensitivity of the Michelson interferometer, the axes of interfering beams have to be superimposed with a residual angle of the order 10-8 rad. The beam spots have to be centred on the mirrors to minimize coupling of alignment noise into longitudinal signals. We present the actual control topology and results from the system in operation, which controls all alignment degrees of the power-recycled Michelson. With this system continuous lock stretches of more than 121 h duration were achieved.

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