Berlin 2014 – wissenschaftliches Programm

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A: Fachverband Atomphysik

A 44: Precision measurements and metrology I (with Q)

A 44.3: Vortrag

Donnerstag, 20. März 2014, 14:45–15:00, DO24 1.101

Testing the breadboard model of the LISA Phasemeter — •Oliver Gerberding, Simon Barke, Nils Brause, Ioury Bykov, Karsten Danzmann, Gerhard Heinzel, Joachim Kullmann, Jens Reiche, and Thomas Schwarze — Max-Planck Institut für Gravitationsphysik (Albert Einstein Institut) und Institut für Gravitationsphysik der Leibniz Universität Hannover

The planned space-born gravitational wave detector LISA will allow to detect gravitational waves at frequencies between 0.1 mHz and 1 Hz. It uses precision heterodyne laser interferometry as main measurement technology. A breadboard model for the phase readout system of these interferometers (Phasemeter) has been developed in the scope of an ESA technology development project by a collaboration between the Albert-Einstein Institute, the Technical University of Denmark and the Danish industry partner Axcon Aps. The breadboard is designed to demonstrate all functions for operating a complete LISA-like metrology system, to meet all performance requirements for a future mission and to study the effort of bringing the design to space qualification. Here we will present a system overview and the results of a comprehensive testing campaign. This includes phase readout of signals between 2 and 25 MHz with 1 microcycle/sqrt(Hz) performance, clock noise transfer, inter-satellite ranging and communication, laser frequency control and acquisition. In addition we present an optical non-linearity test that we use to validate the performance of the full metrology chain by aiming to demonstrate the for LISA necessary dynamic range of 10 orders of magnitude at low frequencies.