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GEO600 during S5

GEO600 during S5. Harald Lück for the Ruthe Team. 9th ILIAS WG1 meeting, Potsdam, 2006. 2.2 W. 2 kW. 2.5 kW. 5 W. GEO600 Optical Layout. 5 W. 0.09. 7 kW. 4 kW. 5 kW. 10 W. GEO in S5 ON &WE mode. Started participating in S5 on Jan. 20th Comissioning during daytime

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GEO600 during S5

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  1. GEO600 during S5 Harald Lück for the Ruthe Team 9th ILIAS WG1 meeting, Potsdam, 2006

  2. 2.2 W 2 kW 2.5 kW 5 W GEO600 Optical Layout 5 W 0.09 7 kW 4 kW 5 kW 10 W

  3. GEO in S5 ON &WE mode • Started participating in S5 on Jan. 20th • Comissioning during daytime • Data taking during nights, weekends and holidays. • Moderate efforts to keep detector locked during data taking times, i.e. no operator shifts.

  4. GEO in S5 24/7 mode • Commissioning stopped on May 1st 2006 • Full time data taking with operators on site in 2 shifts during working days • SMS – alarm system calls operator on duty if predefined problem occurs • Lock-loss > 30min., h_rms > reference, data acquisition faults, ... • Operator calls 'expert' if he cannot solve a problem by predefined procedure • Maintenance times for measuring loop gains, transfer functions, noise projections etc.

  5. SMS Alarm System

  6. GEO600 S5 Science Duty Cycle ON&WE Mode (Jan. 20th – April 30th) 24/7 Mode (May 1st - …)

  7. S5: Duty Cycle • 1. May-17. July, 78 days • Instrumental duty cycle: 95.4% • Science time duty cycle: 90.3% • Longest lock: 102 hours Inst. duty cycle [%] Time [days]

  8. S5: unlocked times • Typical relock-time ~ 5 minutes • Longest unlocked time: 19 hours Histogram of unlocked times < 1 hour Number of unlocked times Unlocked time [minutes]

  9. Tuning (from 350 Hz) to 550 Hz • On April 3rd we changed the tuning from 350 Hz to 550 Hz to improve SNR @ fs above 400 Hz. • Optimized all parameters and combining filters for 550 Hz. • This did not compromise much sensitivity @ low fs as we had a lot of excess noise there anyway.

  10. Sensitivity in Science Runs

  11. Sensitivity in Science Runs

  12. Sensitivity in Science Runs

  13. GW-IFO network (USA & Europe) 4x

  14. Cal. Lines removal from h(t)

  15. Locking procedure with add. 2f signal • PR error signal always available due to asymmetry in BS (~48/52) • MI lock to dark fringe • SR lock with three different signals in detuned state (~2kHz) • Tuning to desired frequency (changing parameters in the process) • Switching MI lock to Single element diode • Switching Servo parameters to lower noise & lower tolerance ones • Ramping up power to ‚final‘ value • In Total: ~ 3min

  16. Locking on 2f-SR sequence At second 4.2 SR control is switched from SR-2f to MI-2f. (only visible by more noise in SR feedback) at second 5.5 the SR freq. is set back to tuning start frequency. For this purpose the SR mod. freq. is set automatically to the value chosen in the front panel, which is 9.018070MHz right now. Also the SR-2f signal is routed in hardware by cmos switch to the SR module. Then 2 sec. after acquisition the 2f-lock is switched to MI-2f signal and then the SR freq. is changed to nominal for tuning start. Then tuning starts as usual… and tunes down to any f > 200 Hz. Straight from the labbook

  17. Sensitivity; tuned vs. 550Hz detuned

  18. Sensitivity; tuned vs. 550Hz detuned (normalized to 550Hz)

  19. BS Violin Modes

  20. BS Violin Modes

  21. BS Violin Modes

  22. Glitches (MIC-VIS, Sine gaussians, Magnetic, Power ups, Seismic etc.)(see Josh‘s glitch talk)

  23. Seismic improvements(here: backing pumps) AC outdoor unit

  24. The Owl

  25. Chasing the owl; different alignments

  26. Chasing the owl; different alignments

  27. Chasing the owl; different alignments yet

  28. Chasing the owl… away • Spotted and repaired bad contact in SR-2f module • Since then the owl is gone !???... So far • Strange, as the owl was there before the module....

  29. 0.782 Hz spaced line forests h(t). 0.7e-13/f^2 * TCIb_Mag_X fits pretty well for a 80Hz < f < 620 Hz Factor 2 off @ 600Hz

  30. Mag. Lines @ 600 Hz

  31. Magnetic features in Central

  32. Magnetic features in Central cntd.

  33. Magnetic features in East house

  34. Magnetic lines sometimes gone !?

  35. (magnetic) 0.782 Hz lines self made with UPSs?

  36. Hourly glitches on mains: ‚Rundsteuersignal‘ Magnetic coupling from mains to h(t) might have to do with too many N – PE connections

  37. Some detective work

  38. S5: a piece of detective work

  39. S5: a piece of detective work Seismic correlations between the 3 corner stations for one of the events C/E N/C N/E Correlation [%] Time [s]

  40. S5: a piece of detective work

  41. S5: a piece of detective work Preparing gravel mining KBU Kies & Baustoffunion

  42. Ripples in h(t)

  43. Ripples in h(t) come from seismic in the north

  44. Problems (solved & remaining) • Glitches (Josh) • Dust • Saturations • Magnetic • Sine Gaussians • Power up • Others • Other problems • Mains: hourly glitches, lines forests, ground currents • PPD • Periodic disturbances probably from end buildings –> coated lenses in next maintenace period • Seismic: isolated many machines(pumps, ACs, fans etc, even some computers in CB) • Vetoes: worked a lot on vetoing glitch events. Can veto about 30%(?) of glitches

  45. Future: • Continue S5 • Decide on maintenance period in autumn • find power losses • increase to full injected power

  46. Subtracting MID AA Feedback noise from H in the time domain (Josh) Conclusions: - Works well ! - Time-domain subtraction of MID AA FBs using _very_ simple filters already improves H factor 2-3 from 10-70Hz. - H with MID AA FBs subtracted is not too far from SR FB 10-80Hz. - Improving this in hardware would be better because software subtraction won't reduce upconversion.

  47. Phase noise couplingNot confirmed by coherence

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