Subtraction of test mass angular noise in the LISA Technology Package interferometer

Details Subtraction of test mass angular noise in the LISA Technology Package interferometer Subtraction of test mass angular noise in the LISA Technology Package interferometer

2012-03-20

arxiv.org/abs/1203.4476v1

Astronomy and Astrophysics

Astrophysics

Instrumentation and Methods for Astrophysics

Applied Physics B - Lasers and Optics (2008)

Scientific paper

10.1007/s00340-007-2923-0

We present recent sensitivity measurements of the LISA Technology Package interferometer with articulated mirrors as test masses, actuated by piezo-electric transducers. The required longitudinal displacement resolution of 9 pm/sqrt[Hz] above 3 mHz has been demonstrated with an angular noise that corresponds to the expected in on-orbit operation. The excess noise contribution of this test mass jitter onto the sensitive displacement readout was completely subtracted by fitting the angular interferometric data streams to the longitudinal displacement measurement. Thus, this cross-coupling constitutes no limitation to the required performance of the LISA Technology Package interferometry.

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