May 6 – 10, 2024
Europe/Rome timezone

High resolution optical accelerometers for active vibration isolation in ETEST

May 7, 2024, 5:30 PM
1h 30m


Poster Instrument Science Board (ISB) Posters


Anthony Amorosi (Université de Liège)


The talk aims to present the design and performance of high-resolution inertial sensors/accelerometers. The sensors are built around a novel interferometric readout technique, allowing to reach sub-pm resolution. These sensors have been employed in the E-TEST project, which have been demonstrating, amongst others, a novel active-passive strategy for isolating the test-mass of the ET. They have been used both as witness sensors for monitoring the residual motion of the payload with high accuracy, and as in-loop sensors in the active vibration compensation system. The sensors have been designed to be compatible with the high-vacuum environment found in most advanced gravitational wave detectors. The witness sensor is also designed for use at cryogenic temperature of 20K, which has been reached in ETEST.

Primary authors

Anthony Amorosi (Université de Liège) Mr Loïc Amez-Droz (Université Libre de Bruxelles) Morgane Zeoli (Université Catholique de Louvain-la-Neuve)


Ameer Sider (PML - Precision Mechatronics Laboratory, Université de Liège, B-4000 Liège, Belgium) Mr Brieux Thibaut (Université de Liège) Dr Chiara Di Fronzo (University of Western Australia) Prof. Christophe Collette (Université de Liège) Mr Haidar Lakkis (Université de Liège) Ms Mayana Teloi (Université Libre de Bruxelles) Dr Rasa Jamshidi (Lab Motion Stystems)

Presentation materials