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Preparing GEO600 for Gravitational Wave astronomy (A status report)

Preparing GEO600 for Gravitational Wave astronomy (A status report). Martin Hewitson, AEI Hannover for GEO600. Talk overview. Sensitivity of GEO600 Calibration update Data quality indicators and information. GEO600 optical layout. 600m. Attenuated to 2W. interferometer with

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Preparing GEO600 for Gravitational Wave astronomy (A status report)

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  1. Preparing GEO600 for Gravitational Wave astronomy(A status report) Martin Hewitson, AEI Hannover for GEO600

  2. Talk overview • Sensitivity of GEO600 • Calibration update • Data quality indicators and information GWDAW 9, Annecy 2004

  3. GEO600 optical layout 600m Attenuated to 2W interferometer with dual recycling 1W mode cleaner 12W laser 1% Transmission detector GWDAW 9, Annecy 2004

  4. HPD lock + New MI+SR servo SR bench scattering Sensitivity progress (highlights) Typical S3 GWDAW 9, Annecy 2004

  5. Target sensitivity GWDAW 9, Annecy 2004

  6. Noise projections - HP Current HP ESD Feedback SR Feedback PDO Amp noise Shot+detection Uncorr sum GWDAW 9, Annecy 2004

  7. Calibration of GEO600 • Time-domain calibration method • Optimisation routine is used to quasi-continuously estimate parameters of optical response • Update rate is 1Hz • Output is LSC-standard h(t) frame files GWDAW 9, Annecy 2004

  8. Calibration procedure • Correct for MI loop and Optical transfer function(s) x = GWDAW 9, Annecy 2004

  9. optical On-line optical TF measurements CAL P and Q actuator GWDAW 9, Annecy 2004

  10. Calibration progress • On-line calibration of both output quadratures • HP and HQ • Work on optimal combination is underway • Estimation of optical parameters in real-time in control room • On-line calibration leads to overnight runs GWDAW 9, Annecy 2004

  11. HQ sensitivity progress GWDAW 9, Annecy 2004

  12. Combining HP(t) and HQ(t) • Idea is that • So we can form • Do this in the time-domain to fit in with the current calibration method HP(t) = s(t) + np(t) HQ(t) = s(t) + nq(t) HP’ = (HP+HQ)/2 HQ’ = (HP-HQ)/2 GWDAW 9, Annecy 2004

  13. Combining HP and HQ - result • HQ’ contains almost no signal compared to HP’ • Where noise behaves like cal lines, we have apparent displacement • Useful diagnostic for noise hunting (?) GWDAW 9, Annecy 2004

  14. Introducing GEO Summary Pages • A collection of automatically generated web page reports about GEO data quality • To disseminate info about the growing amount of science data • To aid in commissioning by having standard measurements to compare day by day. • To learn about results of various analysis tools http://www.geo600.uni-hannover.de/georeports/ GWDAW 9, Annecy 2004

  15. Report list Click for details GWDAW 9, Annecy 2004

  16. Details page • Lock list • Sensitivity overview • Spectra, BLRMS, Inspiral range • Data quality • Quality channel, calibration parameters • Line catalogues • Lines, harmonics, sidebands • Glitch rate • Time-frequency plots, histograms GWDAW 9, Annecy 2004

  17. What’s coming up • Injected power increase (x2 or more) • Main high-power diode in vacuum • New office buildings and toilets • S4 • Continue overnight and weekend runs • Increase power-recycling factor • Noise hunting and working towards design sensitivity GWDAW 9, Annecy 2004

  18. The End GWDAW 9, Annecy 2004

  19. Noise projections - HQ Current HP ESD Feedback SR Feedback PDO Amp noise Shot+detection Uncorr sum GWDAW 9, Annecy 2004

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