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Katrin Dahl for the AEI 10 m Prototype team

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.

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Katrin Dahl for the AEI 10 m Prototype team

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  1. AEI 10m Prototype http://10m-prototype.aei.uni-hannover.de Stabilising the distance of 10m separated opticaltablesto 100pm/sqrt(Hz) Katrin Dahl for the AEI 10m Prototype team March 2010 – DPG Hannover Q29.1

  2. Prototype hall 11.65m 11.65m

  3. Residual tablemotion Fordetails on tablessee talk Q29.4

  4. Longitudinal motionstabilised

  5. Relative tablemotionstabilised

  6. Why distance stabilisation of tables? Fordetailssee talk Q29.5 The AEI 10m Prototype will provide ultra-low displacementnoisetestingenvironment • To probe at (and later go beyond) the standard quantum limit • Entanglement of macroscopic test masses • For GRACE follow-on and LISA related experiments • ...

  7. (Homodyne) Mach-Zehnderinterferometry

  8. Heterodyne Mach-Zehnder interferometry • No specific lock point • Enablestotracktable motionovermore thanonewavelength • Control bandwidth 100 Hz  heterodynefrequency ofabout 19kHz • Use of in-house knowledge (LISA Pathfinder technology)

  9. Optical layout • 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

  10. Optical layout • 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

  11. 4 Interferometers

  12. Power monitor • Monitoringof • power fluctuations • beam pointing

  13. Reference IFO

  14. Diagnostic IFO

  15. West IFO

  16. South IFO

  17. Test setup

  18. Optical layout

  19. Longitudinal displacement

  20. Pitch

  21. Yaw

  22. Blind test

  23. Thank you for your attention http://10m-prototype.aei.uni-hannover.de

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