1 / 26

GEO600 Status

GEO600 Status. Harald Lück for the Ruthe Team. LSC/Virgo meeting, Hannover October 2007. 3.2 W. 2.7 kW. ~3 kW. 6 W. GEO600 Optical Layout. Key Features: laser mode-cleaners folded arms dual recycling monolithic fused silica suspensions Electro Static Drives. MPR. MSR.

gent
Télécharger la présentation

GEO600 Status

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. GEO600 Status Harald Lück for the Ruthe Team LSC/Virgo meeting, Hannover October 2007

  2. 3.2 W 2.7 kW ~3 kW 6 W GEO600 Optical Layout • Key Features: • laser • mode-cleaners • folded arms • dual recycling • monolithic fused silica suspensions • Electro Static Drives MPR MSR folded arms = 2*600 m Mode Cleaner Detection bench Laser bench

  3. I II 2005 III IV I II 2006 III IV I I I I I I I II II III III IV IV II II III III IV IV II II III III IV IV II 2007 2007 2005 2005 2006 2006 2007 III IV S5 operation of GEO 600 • Commissioning in late 2005: • improving sensitivity and reliability • improving detector characterisation • S5 in overnight & weekend mode January 20th 2006 • continuing improvements • science data (~50 % of the time) • S5 in 24/7 mode May 1st 2006 • S5 in overnight & weekend mode Oct. 2006 – Oct. 2007 • continuing improvements • science data (~60 % of the time)

  4. I I I II III IV II III IV II III IV 2007 2005 2006 GEO 600 in S5 - O&WE ModeJanuary – May 2006 • Started participating in S5 on Jan. 20th • Commissioning work during normal working hours (8-20 CET) • Data taking during nights, weekends, holidays and whenever no commissioning work done • Moderate efforts to keep detector locked during data taking times, i.e. no operator shifts.

  5. I I I II III IV II III IV II III IV 2007 2005 2006 Tuning options Changed tuning on April 3rd from 350 Hz to 550 Hz to improve SNR @ fs above 400 Hz. Optimized all parameters and combining filters. Lost only little SNR @ low fs as we have excess noise there anyway.

  6. I I I II III IV II III IV II III IV 2007 2005 2006 GEO 600 in S5  24/7 modeMay – October 2006 • Full time data taking with 3 operators on site in 2 shifts, during working days • SMS - alarm system calls operator on duty if predefined problem occurs • Fall-back procedure in place to deal with more serious problems • Maintenance times for measuring loop gains, transfer functions, noise projections etc.

  7. I II 2005 III IV I II 2006 III IV I II 2007 III IV GEO600 in S5 - O&WE ModeOctober 2006 – October 2007 • Went back into commissioning mode in October 2006 • Goal: improve sensitivity and data quality to cover down time of LIGO/Virgo upgrades to enhanced versions in 2008

  8. S5 Duty Cycle January 2006 - May 2007 January -May, (100 days) • science time duty cycle: 46.5%

  9. S5 Duty Cycle 24/7May 2006 – October 2006 May-October, (168 days) • instrumental duty cycle: 94.3% • science time duty cycle: 90.7% • longest lock: 102hours • typical relock ~ 5 minutes

  10. BLRMS 555 - 565 Hz Histogramfor 24/7 period Number of 10 sec stretches @ sensitivity X Sensitivity [1/sqrt(Hz)]

  11. S5 Duty Cycle October 16 2006 – October 01 2007, (350 days) • Instrumental duty cycle: 77.3% • science time duty cycle: 63.6 % • longest lock: 92 hours Easter Amaldi X-mas Mains failure ESD problems TCOc Trafos Vacuum work Vacuum work

  12. Why do we call it Over-night&Weekend mode? Spectrum of science times in O&W mode 1/day 1/week

  13. GEO600 S5 summary • Collected ~ 421 days of science data • Overall S5 (Jan. 06 – Oct. 07) duty cycle 68%

  14. Current Strain Sensitivities of LSC/Virgo

  15. Displacement Sensitivities of LSC/Virgo

  16. Noise projections Power 70

  17. Noise projections Power 75

  18. Investigate test mass scattering & view port exchange Powerful glitch veto New high voltage feedthrough Re-design the detection bench Samples of commissioning work New low noise RF bench for PR loop Transformer exchange

  19. Losses & Scattered light North East

  20. interferometer with „dual recycling“ modecleaner 12W Laser detector

  21. North East Measured intensity of 1.8mW/cm2 Estimated integrated power: ~ 200mW =~ 10-4/mirror Scattering function: (LIGO-T070259-00-Z)

  22. Decrease glitch rate Example for 8 hours: September 07 S5, September 06 Glitch rate comparable to LIGO

  23. You are here Timelines Virgo+ Advanced Virgo GEO HF Hanford Advanced LIGO LIGO+ Livingston Launch Transfer data DS PCP Construction Commissioning data 1st Generation 2nd Generation 3rd Gen.

  24. Astrowatch (2008) • What ? • GEO600 science run starting Nov. 2007 • Why ? • Cover the time when LIGO/VIRGO are upgrading • Who ? • GEO600, bars and LIGO H2 as upgrades permit ‏ • How? • Heterodyne, detuned 500 Hz (same as S5)‏ • Improvement work at low level • aim at ~80% science duty cycle Image from:members.cox.net/~k5xi/summer_milky_way.jpg

  25. GEO600 Site Tour: Thursday 14:00 ILIAS WG1 GW meeting incl. Mystery Noise Discussion: Tuesday 18:30

More Related