1. Status of GEO600 Benno Willke for the GEO600 team Aspen Meeting Aspen CO, January 2005 LIGO-G050030-00-Z

2. Aspen05, B. Willke Sensitivity Improvements

3. Aspen05, B. Willke Transition Commissioning - Observing overnight runs Aug04 – Jan05: 1405h (duty cycle: 93.7%)

4. Aspen05, B. Willke

5. Central Building

6. Aspen05, B. Willke Tube / Trench

7. Aspen05, B. Willke Clean Room / Control Room

8. Aspen05, B. Willke Reaction Pendulum

9. Aspen05, B. Willke GEO600 optical layout 12W laser mode cleaner interferometer with dual recycling detector Attenuated to 6W 1% Transmission 600m

10. Aspen05, B. Willke Sensitivity progress (highlights) Typical S3 HPD lock + New MI+SR servo SR bench scattering

11. Aspen05, B. Willke Sensitivity – Jan 2005 h(f) [ 1/sqrt(Hz )] Frequency [Hz]

12. Aspen05, B. Willke

13. Sensitivity Change with Heater Power

14. Aspen05, B. Willke Amplitude Noise Coupling

15. Aspen05, B. Willke Unbalanced Sidebands

16. Aspen05, B. Willke Optical Gain

17. Aspen05, B. Willke Calibration

18. Aspen05, B. Willke On-line optical TF measurements actuator optical CAL P and Q

19. Aspen05, B. Willke 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

20. Aspen05, B. Willke 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 (?)

21. Aspen05, B. Willke Overnight Runs – Jan 14th

22. Aspen05, B. Willke Noise Projections

23. Aspen05, B. Willke Summary & Outlock GEO600 runs with dual-recycling on large baseline detector including calibration sensitivity improved by two orders of magnitude since S3-I data taking over night and on weekends with high duty cycle next steps: –LSC–S4 science run –increase injected power –increase power recycling gain –improve noise models and increase sensitivity –convert GEO into observatory GEO-HF

24. Aspen05, B. Willke