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Johannes Bäuerlein (Max-Planck-Institute for Gravitational Physics)Low Frequency NoisePresentation
Third-generation gravitational wave detectors, like the Einstein Telescope, aim to improve the sensitivity of the detection band in the low-frequency region. For this, displacement sensors with high sensitivity between 200 mHz and 200 Hz are required for seismic isolation. We demonstrate a heterodyne interferometric displacement sensor that is compact and achieves sub-picometer sensitivity in...
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Lionel Maurin (LAUM)Low Frequency NoisePresentation
With the development of new generation detectors, many fundamental or technical noise sources that do not limit the performance of existing detectors must be controlled; in particular, vibrational and acoustic noise generated by the technical equipment necessary for the detector’s operation (pumps, ventilation, DAQ, etc…). Here, we focus on the acoustic noise generated by the air conditioning...
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Chiara Di FronzoLow Frequency NoisePresentation
Seismic noise is characterized by different features and sources, and it affects the detectors in different ways [Daw2004, Beker2011, Accadia2012, MacLeod2012, Trozzo2022, Figura2022]. Most of the contributions come at the microseismic peak (0.1-0.5 Hz) due to the Ocean waves exciting surface waves on the ground. At lower frequencies, the variation of gravity gradients due to mass motion on or...
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Matthew Evans (MIT)Low Frequency NoisePresentation
The Cosmic Explorer Suspension design is progressing toward a concept that includes feature of the Advanced LIGO and Virgo suspensions. I will present on the status of the design process, show parameters and models of the suspension, and discuss expectations for next steps.
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Tomislav Andrić (Istituto Nazionale di Fisica Nucleare)Low Frequency NoisePresentation
Gravitational-wave interferometers rely on hundreds of feedback control loops to stabilize mirror alignment and maintain detector sensitivity. These control systems can inject noise into the observation band, limiting low-frequency performance. Recently, the Deep Loop Shaping (DLS) approach demonstrated that reinforcement learning (RL) can substantially reduce injected control noise in the...
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Patrick Mortimer (University of Birmingham)Low Frequency NoisePresentation
Current generation Gravitational Wave detectors are sensitive to mergers >20Hz, limited by ground motion and inertial sensing noise. To expand the range to lower frequencies we have developed and demonstrated a range of UHV compatible inertial isolation and position sensing technologies that permit active platform stabilization down to 10mHz in 6 DOF. These technologies are:
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- Laser-position... -
Maria Antonietta Palaia (Università di Pisa and INFN-Pisa)Low Frequency NoisePresentation
Second-generation gravitational wave detectors have progressively improved their sensitivity, approaching the limits of their infrastructure. Next-generation observatories, such as the Einstein Telescope and Cosmic Explorer, aim to further enhance sensitivity, enabling detection of high-redshift compact object mergers and early multimessenger alerts by lowering the minimum detectable...
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40. Low-Frequency Interferometric Displacement Readout for Opto-Mechanical Newtonian-Noise DetectionAvanish Kulur Ramamohan (Australian National University)Low Frequency NoisePresentation
At the Australian National University, we are developing an opto-mechanical torsion pendulum sensor for direct detection of Newtonian noise to help improve the low-frequency sensitivity of future gravitational wave detectors. The sensor design consists of two suspended orthogonal pendulums that rotate differentially in response to local gravity fluctuations, i.e., Newtonian noise.
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Felipe Guzman (University of Arizona)Low Frequency NoisePresentation
We will report our progress on the development of our compact low-frequency optomechanical accelerometers, which consist of monolithically fabricated mechanical resonators that are read out by miniaturized heterodyne laser interferometers. We will also present ODIN, the Optomechanical Distributed Instrument for Inertial Sensing and Navigation, which is a compact, low-mass optomechanical...
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Thomas Roocke (Caltech / Adelaide University)Low Frequency NoisePresentation
The position and angular control of LIGOs suspended optics, and the damping of their mechanical resonances, is essential for the operation of the detector. Currently, this is achieved using OSEMs, which combine a shadow displacement sensor and electromagnetic voice-coil actuator. However, the noisefloor of these sensors is limiting the motion of the optics on the triple and quadruple...
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Dr Conor Mow-Lowry (Vrije Universiteit Amsterdam and Nikhef)Low Frequency NoisePresentation
We have developed a broad and cohesive programme for tackling low-TRL technology items and the extreme systems-engineering challenges for ET Suspensions. Key elements of the programme are: the OmniSens experiment for active isolation in 6 DoF, development of novel sensors for suspension sensing and control, Femto + Optimal Controls models of complete suspension systems, and a structured...
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