LIGO-G9900XX-00-M LIGO Status and Plans Barry Barish 5 June 2000 Gravitational Waves: A Challenge to Theoretical Astrophysics Trieste, 5-9 June 2000.

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Presentation transcript:

LIGO-G9900XX-00-M LIGO Status and Plans Barry Barish 5 June 2000 Gravitational Waves: A Challenge to Theoretical Astrophysics Trieste, 5-9 June 2000

LIGO-G9900XX-00-M Seismic Isolation Systems Progress »production and delivery of components almost complete »early quality problems have mostly disappeared »the coarse actuation system for the BSC seismic isolation systems has been installed and tested successfully in the LVEA at both Observatories »Hanford 2km & Livingston seismic isolation system installation has been completed, with the exception of the tidal compensation (fine actuation) system »Hanford 4km seismic isolation installation is complete HAM Door Removal (Hanford 4km)

LIGO-G9900XX-00-M 2km Fabry-Perot cavity  Includes all interferometer subsystems »many in definitive form; analog servo on cavity length for test configuration  confirmation of initial alignment »~100 microrad errors; beams easily found in both arms  ability to lock cavity improves with understanding » 0 sec 12/1 flashes of light » 0.2 sec 12/9 » 2 min 1/14 » 60 sec 1/19 » 5 min 1/21 (and on a different arm) » 18 min 2/12 » 1.5 hrs 3/4 (temperature stabilize pre modecleaner)

LIGO-G9900XX-00-M LIGO II incremental improvements

LIGO-G9900XX-00-M LIGO astrophysical sources

LIGO-G9900XX-00-M LIGO astrophysical sources  Pulsars in our galaxy »non axisymmetric: 10-4 <  < 10-6 »science: neutron star precession; interiors »narrow band searches best

LIGO-G9900XX-00-M gravitational waves ’s light Supernovae

LIGO-G9900XX-00-M Supernovae Gravitational Waves Non axisymmetric collapse ‘burst’ signal Rate 1/50 yr - our galaxy 3/yr - Virgo cluster

LIGO-G9900XX-00-M LIGO astrophysical sources SN1987A

LIGO-G9900XX-00-M Conclusions  LIGO I construction complete  LIGO I commissioning and testing ‘on track’  Interferometer characterization underway  Data analysis schemes are being developed, including tests with 40 m data  First Science Run will begin in 2002  Significant improvements in sensitivity anticipated to begin about 2006