Vajente GWDAW11 StatusOfVirgo

Status of Virgo: 

Status of Virgo Gabriele Vajente INFN Pisa and Scuola Normale Superiore di Pisa On behalf of the Virgo Collaboration 11th Gravitational Wave Data Analysis Workshop Potsdam, December 18th 2006

Virgo collaboration: 

Virgo collaboration New groups joined the collaboration ESPCI Paris LAPP LAL Orsay LMA Lyon OCA INFN Perugia INFN Firenze INFN Napoli INFN Pisa INFN Roma 1 NIKHEF INFN Roma 2

Restart after shutdown: 

Restart after shutdown Last winter shutdown for hardware upgrades Injection bench replacement to run with higher input power (10 W enter the ITF) Power Recycling mirror replacement with new monolithic mirror, higher reflectivity (95 %)

Thermal issues: 

Thermal issues Higher power produces thermal effects Lock acquisition long (~20 min) Thermal transient is a critical period Wait for 10 min after reaching dark fringe condition Needed a reduction of input power to 5.5 W (entering the ITF) Need for a thermal compensation system, work starting BS Pick-off power Lower sideband Higher sideband

Week-end Science Run: 

Week-end Science Run Periodic short data taking started in September 2006 start moving towards a science run operation take snapshots of the commissioning progress take clean data in controlled conditions light organization priority always on commissioning WSR1 September 08th - 11th WSR2 September 22th - 25th WSR3 October 06th - 09th WSR4 October 13th - 16th WSR5 November 10th - 13th WSR6 December 01th - 04th WSR7 January 12th - 15th

Sensitivity in WSRs: 

Sensitivity in WSRs

Comparison of sensitivity: 

Comparison of sensitivity

Duty cycle and horizon in WSRs: 

Duty cycle and horizon in WSRs Horizon for NS NS (averaged) [MPc] WSR1 Duty cycle 87.7% Longest lock 15 h WSR2 Duty cycle 68.7% Longest lock 27 h WSR5 Duty cycle 64.2% Longest lock 10 h WSR6 Duty cycle 80.5% Longest lock 18 h

Dependence on weather conditions: 

Dependence on weather conditions The horizon is affected by microseismic conditions Sea activity Wind Suspension control improvements on-going Horizon NS-NS optimal [MPc] Seismic activity [a.u.] Seismic activity [a.u.] RMS 220 mHz – 1 Hz RMS 30 mHz – 100 mHz

Noise budget: 

Noise budget Below 50 Hz control noise (longitudinal and angular) Above 1kHz frequency noise and shot noise Intermediate region WSR5

Acoustic noise / diffused light: 

Acoustic noise / diffused light The main suspect is acoustic and seismic noise from benches in air Through diffused and scattered light effects Investigations on-going Projection of acoustic noise introduced by the detection bench, measured with acoustic noise injections

Brief overview of Data Analysis at Virgo: 

Brief overview of Data Analysis at Virgo Virgo search groups Bursts Binary inspirals Periodic signals Stochastic background Noise studies Virgo-Bars network Virgo-LIGO collaboration

Brief overview of Data Analysis at Virgo: 

Brief overview of Data Analysis at Virgo Virgo search groups Bursts Binary inspirals Periodic signals Stochastic background Noise studies Virgo-Bars network Virgo-LIGO collaboration Analysis of data quality (talk by E.Cuoco) Studies on veto procedures and efficiency (poster by M. Del Prete) Search fro bursts from GRB 050915a (poster by A. Corsi)

Brief overview of Data Analysis at Virgo: 

Brief overview of Data Analysis at Virgo Virgo search groups Bursts Binary inspirals Periodic signals Stochastic background Noise studies Virgo-Bars network Virgo-LIGO collaboration On-line analysis perfomed using Merlino and MBTA algorithms (talk by L. B. Bosi) Study on coherent analysis with a network of ITF (poster by S. Birindelli) Improvements in the timing accuracy (poster by D. Grosjean)

Slide15: 

Brief overview of Data Analysis at Virgo Virgo search groups Bursts Binary inspirals Periodic signals Stochastic background Noise studies Virgo-Bars network Virgo-LIGO collaboration Coincidence analysis between C6 and C7 run (talk by C.Palomba)

Slide16: 

Brief overview of Data Analysis at Virgo Virgo search groups Bursts Binary inspirals Periodic signals Stochastic background Noise studies Virgo-Bars network Virgo-LIGO collaboration Analysis of prospect of detection in a network search Virgo/LSC (talk by G.Cella)

Slide17: 

Brief overview of Data Analysis at Virgo Virgo search groups Bursts Binary inspirals Periodic signals Stochastic background Noise studies Virgo-Bars network Virgo-LIGO collaboration Search and removal of lines (poster by I. Fiori et al.)

Slide18: 

Brief overview of Data Analysis at Virgo Virgo search groups Bursts Binary inspirals Periodic signals Stochastic background Noise studies Virgo-Bars network Virgo-LIGO collaboration Analyzed 24 hours of data in coincidence during Virgo C7 run ILIAS-WG2 methodological paper under preparation (Talk by L. Baggio)

Slide19: 

Brief overview of Data Analysis at Virgo Virgo search groups Bursts Binary inspirals Periodic signals Stochastic background Noise studies Virgo-Bars network Virgo-LIGO collaboration Comparison of calibration and pipelines Methodological work on simulated data Exchanges of short data segments for developing and testing network analysis methods.

Prospects for the future: 

Prospects for the future 2007 2008 2009 Virgo WSRs Virgo commissioning Virgo+ upgrade Virgo+ commissioning Virgo+ Scientific Run Virgo commissioning TIME Virgo Scientific Run (in coincidence with S5)

Virgo+: 

Virgo+ 50 W laser, F=150 cavities Low loss suprasil end mirrors Monolitic suspensions Shot noise decreased Thermal noise decreased

Summary: 

Summary WSR program started and continuing with good duty cycle improving sensitivity (high frequency almost at measured shot noise, comparable with LIGO) Commissioning continues big efforts in the 50 - 500 Hz region Goal to have a Science Run in coincidence with LSC S5 Plans for Virgo+ upgrade