katrin dahl for the aei 10 m prototype team
DESCRIPTION
AEI 10m Prototype. http://10m-prototype.aei.uni-hannover.de Stabilising the distance of 10 m se parated optical tables to 100 pm / sqrt (Hz). Katrin Dahl for the AEI 10 m Prototype team. March 2010 – DPG Hannover Q29.1. Prototype hall. 11.65 m. 11.65 m. Residual table motion. - PowerPoint PPT PresentationTRANSCRIPT
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Katrin Dahl for the AEI 10 m Prototype teamMarch 2010 – DPG Hannover Q29.1
http://10m-prototype.aei.uni-hannover.de
Stabilising the distance of 10 m separated optical tables to 100 pm/sqrt(Hz)
AEI 10m Prototype
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Prototype hall
11.65 m
11.6
5 m
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For details on tables see talk
Q29.4Residual table motion
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Longitudinal motion stabilised
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Relative table motion stabilised
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Why distance stabilisation of tables?
The AEI 10 m Prototype will provide ultra-low displacement noise testing environment• To probe at (and later go beyond) the standard quantum limit • Entanglement of macroscopic test masses• For GRACE follow-on and LISA related experiments • ...
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For details see talk Q29.5
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(Homodyne) Mach-Zehnder interferometry
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Heterodyne Mach-Zehnder interferometry
• No specific lock point Enables to track table
motion over more than one wavelength
• Control bandwidth 100 Hz heterodyne frequency
of about 19 kHz
• Use of in-house knowledge (LISA Pathfinder technology)
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Optical layout
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• Heterodyne Mach-Zehnder IFOs with unequal arm lengths (by 23m)
• Stable laser required to reach design sensitivity of 100 pm/sqrt(Hz)@10 mHz – iodine stabilized Nd:YAG
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Optical layout
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• Thermal drifting requires components to be bonded onto a Clearceram (CTE=0.4*10-7/K) baseplate by hydroxide-catalysis bonding technique.
• Beam height 45 mm
• Use of quadrant photodiodes
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4 Interferometers
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Monitoring of • power fluctuations• beam pointing
Power monitor
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Reference IFO
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Diagnostic IFO
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West IFO
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South IFO
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Test setup
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Optical layout
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Longitudinal displacement
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Pitch
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Yaw
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Blind test
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Thank you for your attention http://10m-prototype.aei.uni-hannover.de