Conveners
Low Frequency Noise, Control and Sensing 2
- Conor Mow-Lowry (Vrije Universiteit Amsterdam and Nikhef)
- Katherine Dooley (Cardiff University)
- Paola Puppo (INFN - ROMA)
Description
Suspension modeling, integration with sensing and control, linear control and Neural Networks
Tilt-induced noise plays a crucial role in current and planned gravitational-wave (GW) detectors, as well as in smaller seismically-stabilized platforms. We present an example case for seismically-isolated platform "VATIGrav" in our laboratory, discussing tilt measurement setup, modelling of system performance and potential mitigation strategies. In this work we use general-purpose open source...
The Einstein Telescope low-frequency (ET-LF) interferometers will extend the detection band for gravitational-waves down to 3 Hz. Significant design decisions, such as an underground infrastructure, have already been taken. With the instrument proposal due in the mid-2020’s other design decisions are under active deliberation.
Critical to achieving the displacement sensitivity of ET-LF is the...
Newtonian noise (NN) is one of the limiting noise sources for the low-frequency sensitivity of GW detectors. To measure this contribution, during O3 a tiltmeter was installed in Virgo as part of a NN reduction system. As tiltmeter, we exploited the prototype balance for the Archimedes experiment, devoted to the measurement of the interaction between quantum vacuum energy and gravity. The same...
Gravitational Wave (GW) detectors must use control loops to achieve the desired working point. Typically, these detectors have 4 or 5 main longitudinal Degrees of Freedom (DoFs) for which it is usually possible to extract suitable error signals by design. Therefore, they can be considered as diagonal systems allowing to close all the loops following a typical Single-Input Single-Output (SISO)...
