status of the h1 squeezer experiment
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G0900538-v1
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
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