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Status of the H1 Squeezer Experiment

Status of the H1 Squeezer Experiment. 8 th EDOARDO AMALDI CONFERENCE, New York, June 26, 2009 Daniel Sigg, LIGO Hanford Observatory ANU, AEI, MIT, CIT and LHO collaboration. Motivation. High power operation in future detectors Maybe the biggest remaining technical risk

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Status of the H1 Squeezer Experiment

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  1. Status of the H1 Squeezer Experiment 8th EDOARDO AMALDI CONFERENCE, New York, June 26, 2009 Daniel Sigg, LIGO Hanford Observatory ANU, AEI, MIT, CIT and LHO collaboration

  2. Motivation • High power operation in future detectors • Maybe the biggest remaining technical risk • Squeezing allows for lower laser power • Squeezer technology now ready • 7 dB of squeezing down to 10 Hz • Has been demonstrated on a bench and on interferometers (40M) Missing: Low frequency noise demonstration • Planned Experiments • GEO600: prototype for long baseline interferometers • Hanford: low noise at low frequency H1 Squeezer Status

  3. Goal of the H1 Squeezer Experiment • Demonstrate squeezing at low frequency with ahighly sensitive long baseline interferometer • Demonstrate 3 dB of squeezing at frequencies where we are shot noise limited • Do not introduce noise at other frequencies! • Build a squeezer which could be readily turned into an advanced LIGO upgrade • Be ready for a test in Hanford after next science run • We got the OK to build it H1 Squeezer Status

  4. 40M squeezing K. Goda, O. Miyakawa, E. E. Mikhailov, S. Saraf, R. Adhikari, K.McKenzie, R. Ward,S. Vass, A. J. Weinstein, and N. Mavalvala, Nature Physics 4, 472 (2008) H1 Squeezer Status

  5. Projected H1 Sensitivity H1 Squeezer Status

  6. Projected Advanced LIGO Sensitivity at 30W H1 Squeezer Status

  7. Baseline Design • Inject into anti-symmetric port • New optics table required (8’ x 3’) • New Faraday isolator design required • Reuse initial LIGO Nd:YAG laser (10W) • Second-harmonic generator (SHG) uses AEI design • Locked to interferometer laser by fiber • Frequency locked auxiliary laser for frequency shifted subcarrier • Optical parametric oscillator (OPO) • ANU design: Doubly resonant • Bowtie configuration: Less backscattering • Non-linear crystal: PPKTP • Homodyne Detector from AEI • Use advanced LIGO electronics where possible (Hanford) • Assembly and testing at MIT H1 Squeezer Status

  8. Optical Layout H1 Squeezer Status

  9. HAM4 Layout SQT3 H1 Squeezer Status

  10. eLIGO S6 aLIGO: install/ commissioning LLO LHO ~6 months H1 Squeezer Time Line • Fixed start date for H1 experiment: 2/15/2011 • Fixed end date for H1 experiment: 10/3/2011 Better be ready! H1 Squeezer Status

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