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Deuxième Assemblée Générale du GdR Ondes Gravitationnelles

10–11 oct. 2019
INSTITUT DE PHYSIQUE NUCLEAIRE LYON
Fuseau horaire Europe/Paris

Contact: GdR

Session

Groupe de travail: Développement des détecteurs

11 oct. 2019, 09:00
Amphithéâtre (INSTITUT DE PHYSIQUE NUCLEAIRE LYON)

Amphithéâtre

INSTITUT DE PHYSIQUE NUCLEAIRE LYON

DOMAINE SCIENTIFIQUE DE LA DOUA BÂTIMENT PAUL DIRAC 4, RUE ENRICO FERMI 69622 VILLEURBANNE CEDEX

Documents de présentation

Aucun document.

  1. 35. Preparing LISA : Status of the mission and technical activities in France
    Hubert Halloin (APC / University Paris Diderot)
    11/10/2019 09:00
    DEVELOPPEMENT DES DETECTEURS

    LISA is presently undergoing many technical studies to assess its feasibility (Phase A), at ESA, but also in the different countries contributing to the instrument. In France, the foreseen contributions are on the Data Processing Center, the integration and tests (AIVT) of the Instrument and the maintenance of the scientific performance model.In this presentation, I’ll briefly summarise the...

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  2. 20. Intercalibration of Advanced LIGO and Advanced Virgo for the third observing run O3
    Dimitri Estevez (CNRS)
    11/10/2019 09:15
    DEVELOPPEMENT DES DETECTEURS

    The astrophysical parameters estimation of the sources detected by Advanced LIGO and Advanced Virgo is biased by the uncertainty on the physical parameters of each detector of the network and thus the final uncertainty on the reconstruction of the gravitational waves signal h(t). Before the observing run O3, Advanced LIGO and Advanced Virgo had different absolute references for their...

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  3. 23. Reducing quantum noise for Advanced Virgo gravitational-wave detector by using frequency-dependent squeezing technique with Einstein-Podolsky-Rosen (EPR) entanglement
    Catherine Nguyen
    11/10/2019 09:30
    DEVELOPPEMENT DES DETECTEURS

    In order to increase the science reach of GW detectors, it is fundamental to reduce the quantum noise, composed of radiation pressure noise (RPN) at low frequencies (roughly < 100 Hz) and shot noise (SN) at high frequencies (roughly >100 Hz). Since the quantum noise is generated by vacuum fluctuations entering the interferometer, the injection of phase-squeezed vacuum states reduces the SN...

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  4. 24. Squeezing independent de la fréquence pour O3
    Marc Eisenmann (LAPP Virgo)
    11/10/2019 09:45
    DEVELOPPEMENT DES DETECTEURS

    Le bruit quantique limite une part de plus en plus importante de la sensibilité de Virgo. L'injection d'états comprimés du vide, ou squeezing, par le port de détection permet de réduire le bruit quantique sans engendrer de changement drastique sur la configuration du détecteur.
    Cela nécessite néanmoins de limiter les pertes optiques et le bruit de phase qui réduisent fortement le degré de...

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  5. 34. Optical design of the Advanced Virgo + detector
    Jonathon Baird (APC)
    11/10/2019 10:00
    DEVELOPPEMENT DES DETECTEURS

    Advanced Virgo+ (AdV+) will see the improvement of several aspects of the Advanced Virgo (AdV) detector. In this talk we will give an overview of the efforts on-going for the optical design of the detector. In particular, we will describe the activity related to the increase of the beam size on the test masses, in order to reduce the coating Brownian noise.

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