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A: Fachverband Atomphysik

A 14: Precision Measurements and Metrology III (with Q)

A 14.2: Vortrag

Dienstag, 24. März 2015, 11:30–11:45, G/gHS

Test-bed development to experimentally investigate tilt-to-length coupling for eLISA — •Sönke Schuster¹, Ewan Fitzsimons², Gerhard Heinzel¹, Christian Killow³, Maike Lieser¹, Michael Perreur-Lloyd³, David Robertson³, Michael Tröbs¹, Henry Ward³, and Karsten Danzmann¹ — ¹Albert-Einstein-Institute — ²Airbus Defence and Space — ³University of Glasgow

eLISA (evolved Laser Interferometer Space Antenna) is a planned space-based GW detector consisting of three satellites separated by millions of kilometers. It measures with laser interferometry distance variations between free-floating test masses inside the satellites to detect gravitational waves. The coupling from angular misalignment between the satellites, laser links and test masses into the pathlength readout (tilt-to-length coupling) is currently the second largest entry in the eLISA metrology error budget (after shot noise). Here we give an overview over a test-bed development to experimentally investigate tilt-to-length coupling and test if suitable imaging systems can suppress this coupling to the required level.