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The status of GEO 600

H Grote1, B Allen2, P Aufmuth1, C Aulbert2, S Babak3, R Balasubramanian3, B W Barr4, S Berukoff2, A Bunkowski1, G Cagnoli4, C A Cantley4, M M Casey4, S Chelkowski1, D Churches3, T Cokelaer3, C N Colacino1, D R M Crooks4, C Cutler2, K Danzmann1, R Davies3, R J Dupuis4, E Elliffe4, C Fallnich5, A Franzen1, A Freise1, S Goßler1, A Grant4, S Grunewald2, J Harms1, G Heinzel1, I S Heng1, A Hepstonstall4, M Heurs1, M Hewitson4, S Hild1, J Hough4, Y Itoh2, R Jones4, S H Huttner4, K Kawabe4, C Killow4, K Kötter1, B Krishnan2, V Leonhardt1, H Lück1, B Machenschalk2, M Malec1, R A Mercer6, C Messenger6, S Mohanty2, K Mossavi1, S Mukherjee2, P Murray4, S Nagano1, G P Newton4, M A Papa2, M Perreur-Lloyd4, M Pitkin4, M V Plissi4, V Quetschke1, V Re6, S Reid4, L Ribichini1, D I Robertson4, N A Robertson4,7, J D Romano3, S Rowan4, A Rüdiger1, B S Sathyaprakash3, R Schilling1, R Schnabel1, B F Schutz2,3, F Seifert1, A M Sintes8, J R Smith1, P H Sneddon4, K A Strain4, I Taylor3, R Taylor4, A Thüring1, C Ungarelli6, H Vahlbruch1, A Vecchio6, J Veitch4, H Ward4, U Weiland1, H Welling5, P Williams2, B Willke1, W Winkler1, G Woan4 and I Zawischa5

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Since December 2003, the gravitational-wave detector GEO 600 has routinely operated in the dual recycled mode, using a lock acquisition scheme based on the detection of optical sideband power at the dark port. With the detector locking very robustly, the current commissioning work is entirely dedicated to sensitivity improvements. We give a brief overview of the GEO 600 detector, the implementation of dual recycling, and summarize recent work regarding the increase in the detector sensitivity.


PACS

04.80.Nn Gravitational wave detectors and experiments

07.60.Ly Interferometers

MSC

83C35 Gravitational waves

Subjects

Instrumentation and measurement

Gravitation and cosmology

Dates

Issue 10 (21 May 2005)

Received 27 October 2004

Published 21 April 2005



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