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GRAvitational-waves Science&technology Symposium (GRASS 2022)

6–7 Jun 2022
Palazzo Moroni, Padova
Europe/Rome timezone

GRASS LOC

Session

Poster session

7 Jun 2022, 10:30
Sala Paladin (Palazzo Moroni, Padova)

Sala Paladin

Palazzo Moroni, Padova

Presentation materials

There are no materials yet.

  1. 36. Optical and mechanical properties of titania-silica coatings
    Viola Spagnuolo
    07/06/2022, 10:30
    Optical coatings
    Poster

    The lower limit in sensitivity of gravitational wave detectors at their most sensitive frequencies arises from the Brownian motion of high reflectivity coatings on the test mass optics. In the aim to find alternative materials for the next upgrade of interferometric detectors, large interest was represented by Titania-doped Silica.
    We present here our investigations into the mechanical and...

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  2. 19. Scattered light noise from Virgo viewports: results and possible mitigations
    Dr Maria Concetta Tringali (EGO - European Gravitational Observatory)
    07/06/2022, 10:35
    Stray light
    Poster

    In addition to the fundamental noises (quantum noise, thermal noise, and seismic noise) affecting the sensitivity of ground-based gravitational-wave interferometers, the technical noises often limit some frequency bands. A substantial part of the detector commissioning is devoted to the study and the mitigation of technical noises. Scattered light is among these noises. In this presentation,...

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  3. 7. Stray Light Measurements With an Instrumented Baffle in the Advanced Virgo Input Mode Cleaner Cavity
    Machiel Kolstein (IFAE)
    07/06/2022, 10:40
    Stray light
    Poster

    In April 2021, a new instrumented baffle was installed surrounding the suspended end mirror of the Virgo’s Input Mode Cleaner (IMC) cavity, as part of the phase I upgrade of the Advanced Virgo interferometer. The device is equipped with photo sensors that monitor the stray light inside the cavity. It serves as a demonstrator of the technology for the baffles that will monitor the stray light...

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  4. 26. Flexible and Fast Estimation of Binary Merger Population Distributions with Adaptive KDE
    Dr Jam Sadiq (University of Santiago de Compostela, Spain)
    07/06/2022, 10:45
    Data analysis
    Poster

    The LIGO Scientific, Virgo and KAGRA Collaborations recently released the third gravitational-wave transient catalog or GWTC-3, significantly expanding the number of gravitational wave (GW) signals. There are various models proposed to describe the underlying mass distribution of these compact objects using computational extensive Bayesian hierarchical models and use them to predict the...

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  5. 9. Beam characterization with the phase cameras in Advanced Virgo
    Ricardo Cabrita (UCLouvain)
    07/06/2022, 10:50
    Wavefront sensing and control
    Poster

    Wavefront sensing allows for probing mode mismatch, higher order modes and thermal effects in gravitational-wave interferometers, all of which need to be well controlled as they impact the interferometer’s stability and sensitivity. The phase cameras installed at Advanced Virgo (AdV) are capable of generating amplitude and phase images of the laser beam wavefront at any beat frequency of...

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  6. 24. Coping with Point Absorbers in Advanced Virgo
    Maria Cifaldi (Istituto Nazionale di Fisica Nucleare)
    07/06/2022, 10:55
    Wavefront sensing and control
    Poster

    The increase of the optical power expected for the new observing run (O4) will lead to an improvement of the interferometer (ITF) sensitivity with a consequently increase of the detection volume and the number of candidate sources. At this condition, the thermal distortions, induced by absorption inside the optics, degrade the ITF performance reducing the quality of the control signals and the...

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  7. 35. Optical design of the laser injection line into a small-scale suspended interferometer for Quantum Noise reduction in GW detectors
    Francesco De Marco (Istituto Nazionale di Fisica Nucleare)
    07/06/2022, 11:00
    Other challenges for future GW detectors
    Poster

    On 14 September 2015, a century after the birth of General Relativity, all the scientific and technological efforts for the experimental detection of gravitational waves (GWs) found a reward. The instruments that allowed the first direct detection are second-generation GW interferometers, such as LIGO and Virgo. At present, after the conclusion of the scientific observing run O3, about 90 GW...

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