Erlangen 2026 – scientific programme

Parts | Days | Selection | Search | Updates | Downloads | Help

T: Fachverband Teilchenphysik

T 39: Gravitational Waves II

T 39.6: Talk

Tuesday, March 17, 2026, 17:30–17:45, KS 00.005

Testing Noise Mitigation Techniques for Future Gravitational Wave Detectors — Markus Bachlechner, Johannes Erdmann, •Tim J. Kuhlbusch, Achim Stahl, and Jochen Steinmann — III. Physikalisches Institut, RWTH Aachen

Future gravitational wave (GW) detectors like the Einstein Telescope aim to decrease the detector noise to increase the precision of measurements and to detect weaker signals. To measure the minuscule length changes induced by GWs, extremely low vibration levels for the test masses are required. New noise sources become relevant in reducing the residual vibrations of the test masses. Gravitational couplings from density fluctuations of the surrounding material, called gravity gradient noise, can not be shielded. Therefore, predicting the coupled noise from inertial sensors is essential to reduce the impact in the 1 to 10 Hz range.

Wiener filters are a simple and robust approach to predicting coupled noise. However, the classic Wiener filter can not adapt to variations in the amplitude of the coupled noise. As variations in the amplitude over time are expected for the ambient noise sources in GW detectors, an adaptive filter is required for optimal performance. This talk discusses adaptive filtering options and presents the evaluation in a small-scale interferometer.

Keywords: Noise mitigation; Gravitational wave detection; Newtonian noise; Wiener filter