status of the h1 squeezer experiment
DESCRIPTION
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 - PowerPoint PPT PresentationTRANSCRIPT
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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
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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
2H1 Squeezer Status
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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
3H1 Squeezer Status
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40M squeezing
H1 Squeezer Status 4
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)
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Projected H1 Sensitivity
5H1 Squeezer Status
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Projected Advanced LIGO Sensitivity at 30W
6H1 Squeezer Status
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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
7H1 Squeezer Status
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Optical Layout
H1 Squeezer Status 8
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HAM4 Layout
SQT3 9H1 Squeezer Status
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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!
LLO
LHO
eLIGO S6 aLIGO: install/commissioning
~6 months
10H1 Squeezer Status