DATE EXCEPTIONNELLE : The MIGA atom interferometry gravitational antenna for infrasound GW detection

par Andrea Bertoldi (LP2N)

mardi 30 mai 2017, 11:00 → 12:00 Europe/Paris

Auditorium (LAPP)

Atom interferometry has been proposed for the realization of GW detectors in the infrasound band (10 mHz - 10 Hz) [1]. Such frequency band is forbidden to current ground based GW detectors due to low frequency gravity gradient noise that causes a tidal effect on the suspended mirrors used as test masses to detect gravitational radiation. Adopting as probes arrays of atom clouds in free fall and interrogated simultaneously in a gravity-gradiometer configuration allows the suppression of Newtonian Noise [2], enables low frequency sensitivity, and opens the way toward the realization of infrasound GW detectors on Earth. In this framework, I will report on the MIGA project, whose target is to build a demonstrator for GW detection using atom interferometry in the underground environment of LSBB (Rustrel, France). [1] S. Dimopoulos,et al, Phys. Lett. B 678, 37 (2009) [2] W. Chaibi,et al, Phys. Rev. D. 93 (2), 021101 (2009)

Transparents miga_LAPP.pdf miga_LAPP.ppt