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Réunion ET France 2025

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Dirac/RdC-Amphithéâtre (IP2I)

Dirac/RdC-Amphithéâtre

IP2I

Institut de Physique des 2 infinis de Lyon Campus LyonTech – La Doua – Bâtiment Paul Dirac 4, rue Enrico Fermi 69622 Villeurbanne Cedex https://www.ip2i.in2p3.fr/pratiques/
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Description

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Google map to reach IP2I from the tramway station "Université Lyon 1"

The meeting is following a Virgo-France meeting on Monday/Tuesday: https://indico.in2p3.fr/event/36934/  (independant registration).

 

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Participants
  • Alexandra Carrez
  • Alexandre Lacroix
  • Angélique Lartaux
  • Anne Daumas
  • Christian Olivetto
  • Damir Buskulic
  • Danièle Steer
  • Eleonora Capocasa
  • Francois Gautier
  • Jacques DING
  • Laurent PINARD
  • Manuel Andia
  • Mathieu Schoor
  • Matteo Barsuglia
  • Maxime LE JEAN
  • Michael HARTMAN
  • Michele Mancarella
  • Myriam ZERRAD
  • Nicola Tamanini
  • Romain Gouaty
  • Stéphane PERRIES
  • Susanna Diana VERGANI
  • Sylvain Chaty
  • Tito DAL CANTON
  • Viola Sordini
  • Yuhang Zhao
  • +10
  • mar. 7 octobre
  • mer. 8 octobre
    • ISB Session
      • 9
        Modelling Newtonian noise of acoustic in the caverns of the ET gravitational wave detector

        Among the noises affecting GW detectors, Newtonian noise of seismic or acoustic origin could limit sensitivity at low frequencies, below a few tens of Hz. This presentation focuses on modeling Newtonian noise of acoustic origin, resulting from technical noises in caverns and experimental halls. A significant contribution to this technical noise is specifically linked to the operation of the air conditioning system, which is essential to ensure the thermal stability and cleanliness of these rooms. The acoustic pressure present in the environment is responsible for small fluctuations in density. The fluctuating gravitational field that is induced directly causes random forces on sensitive optical elements, such as the interferometer's test masses. Acoustic Newtonian Noise is quantified using a numerical model of the acoustic field in an arm-end cavern. This model describes the modal response of the room under the effect of acoustic sources equivalent to the vents of the ventilation system, which allows the calculation of Newtonian noise based on equipment parameters (rotation speed, vent position). The criticality of this noise source for the detector is discussed, given the sensitivity targeted by ET in the low frequency range. Possible solutions for reducing Newtonian acoustic noise are examined.

        Orateurs: Francois Gautier (LAUM, Laboratoire d'Acoustique de l'Université du Mans, UMR CNRS 6613), L. Maurin, Matteo Barsuglia, S. Terrien
        25-10-08-Journee_ETFrance_LAUM.pptx
      • 10
        Performance of multiple filter-cavity schemes for frequency-dependent squeezing in gravitational-wave detectors
        Orateur: Jacques DING (Université Paris Cité)
        two FC vs CFC.pdf
      • 11
        Activités squeezing en France
        Orateurs: Angélique Lartaux (IJCLab), Eleonora Capocasa
        2025_10_08_ET_France_Squeezing.pdf
    • 10:00
      Pause café
    • OSB Session
      • 12
        EIB (computing et software) status
        Orateur: M. Patrice Verdier (IP2I Lyon - IN2P3)
        2025.10.08 ET-France - EIB.pdf
      • 13
        Mock Data Challenge
        Orateur: Tania Regimbau (LAPP)
        ETMDC_ETFrance_Lyon_2025.pdf
      • 14
        Status of OSB Division 5: Synergies with other GW observatories
        Orateur: Nicola Tamanini (L2I Toulouse, CNRS/IN2P3, Université de Toulouse)
      • 15
        Status of Division 9 Common Tools
        Orateur: Michele Mancarella (Aix-Marseille Université)
      • 16
        Status of Division 6 Nuclear Physics
        Orateur: Micaela Oertel (Observatoire astronomique de Strasbourg, CNRS-Université de Strasbourg)
        et_france_div6.pdf
    • Discussion
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