Cinquième Assemblée Générale du GdR Ondes Gravitationnelles

Session

Groupe de Travail: détecteurs

12 oct. 2021, 15:30

LAPP - Laboratoire d'Annecy de Physique des Particules

32. Status of the Virgo commissioning: on the path towards the O4 run

Romain Gouaty (CNRS, LAPP - UMR5814)

12/10/2021 15:30

Since 2020, the Virgo interferometer has entered the phase 1 of the Advanced Virgo + project, which consists in a series of detector upgrades aiming at improving the Virgo sensitivity by up to a factor 2 for the next data taking run foreseen to start in fall 2022. Following the installation works that took part mostly in 2020, the commissioning phase started in January 2021, with multiple...

31. Development of a crystalline mirror by transfer of a AlGaAs/GaAs multilayer coating on a silica substrate

Victor Hui (LAPP)

12/10/2021 15:45

DEVELOPPEMENT DES DETECTEURS

Reducing thermal noise in mirror's coating is one of the main challenge in the noise hunting field whithin gravitational waves detectors.
Focus has been made on new materials that have better mechanical properties and thus lower thermal noises. I have worked in my PhD thesis work on the development of a Bragg mirror by transferring a AlGaAs/GaAs crystalline coating from a GaAs substrate to a...

13. LISA Dynamics & Control: DFACS Simulation and Optimization, Noise assessment and Data processing

Henri INCHAUSPÉ (Laboratoire APC - Université Paris Diderot)

12/10/2021 16:00

DEVELOPPEMENT DES DETECTEURS

LISA detection principle and sensitivity relies strongly on successful suppression of spacecraft dynamical jitter noise trough post-processing data combination (TDI, INREP). However residuals due to cross-couplings are expected to be important entries to the current noise budget, and in general, post-processing suppression of spacecraft stray motions have not yet been subject to numerous...