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E instein gravitational wave T elescope

Topology Identification - Plans for WP3. E instein gravitational wave T elescope. Andreas Freise 09.10.2007 ILIAS-GW, Tübingen . What is the Detector Topology?. Geometry : Number of sites, detector orientation, overall size

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E instein gravitational wave T elescope

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  1. Topology Identification - Plans for WP3 Einstein gravitational waveTelescope Andreas Freise 09.10.2007 ILIAS-GW, Tübingen

  2. What is the Detector Topology? • Geometry: Number of sites, detector orientation, overall size • Topology: type of each interferometer (Michelson, Sagnac, …), number and position of main interferometer optics • Configuration: interferometer operating point, mode of operation (detuned, narrow- band, …), sensing and control scheme ILIAS-GW 10/2007

  3. 1st generation NEW laser, suspensions, optical scheme, mirrors Same Infrastructure, Similar Topology 2nd generation NEW laser, suspensions, optical scheme, mirrors, vibration isolators. Cryogenics. New Infrastructure, New Topology 3rd generation New Topology = New Interferometry ILIAS-GW 10/2007

  4. Topology Identification • Motivation: Why a new topology? Because we can! Third generation (3G) detectors will require a new infrastructure • The Michelson interferometer is the optimal topology for maximising the optical signal of a gravitational wave with ideal polarisation • It is, however, not necessarily the best choice for • maximising the signal-to-noise ratio • detecting both polarisations of a gravitational wave ILIAS-GW 10/2007

  5. Topology example Early Ideas Rüdiger, ‘85 3 detectors in a triangle configuration ILIAS-GW 10/2007

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  8. Advanced Configurations ILIAS-GW 10/2007

  9. Advanced Configurations ILIAS-GW 10/2007

  10. WP 3 Tasks and Milestones • Evaluation of available and developing technologies for the suppression of quantum noise • Evaluation of technologies for suppressing thermal noise or generally displacement noise • Modelling of Interferometer Topologies. Parameterise the quantum noise limited sensitivity of each technology • Modelling of Interferometer Geometries. Quantify the signal extraction and possible noise reduction capabilities of multiple detectors in dependence of their relative geometry (co-located, co-linear, etc) • Study the effects of very high laser power and compute requirements with respect to circulating light power values • Analyse the cross-compatibilities of the technologies above • Trade-off analysis and system design • Modelling of Interferometer Configuration ILIAS-GW 10/2007

  11. WP 3 Tasks and Milestones Evaluation of detector geometry Evaluation of (quantum-) noise reduction schemes Evaluation of high-power instabilities Trade-off analysis and draft design Final design and component specifications ILIAS-GW 10/2007

  12. The E.T. Work Package 3Topology Identification • Commitment stated in the proposal: • 149 person months • Equally large contributions from Birmingham, Glasgow, Max-Planck, CNRS • Smaller contributions from INFN, EGO • This is a seed corn for a wider activity • Funding through the proposal: • 3 Post-doctoral scientists for 2 years in Birmingham, Hannover and Glasgow • Coordination through Birmingham ILIAS-GW 10/2007

  13. …end ILIAS-GW 10/2007

  14. 1st generation 2nd generation 3rd generation 102 Credit: M. Punturo, G. Losurdo ILIAS-GW 10/2007

  15. ILIAS-GW 10/2007

  16. …end ILIAS-GW 10/2007

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