CE30 - Physique de la matière condensée et de la matière diluée

System for Studying Parametric INstability and its Active Attenuation – SPINA

Submission summary

Parametric instability (PI) is an opto-mechanical phenomenon that affects the stability of Fabry-Pérot cavities and thus it can drastically limit the performances of gravitational wave detectors of second and third generation. The vibrations of the mirrors are amplified by the action of high order optical modes themselves created by these vibrations, which can lead to the loss of the mirrors position control and so to the loss of the detector operational status. The SPINA project is for research on parametric instabilities and ways to actively mitigate them. The goal of the project is to build a table-top optical cavity for studying parametric instability and to validate the PI attenuation device that is under development in our lab, ARTEMIS. A device which uses the radiation pressure applied by an auxiliary laser to damp the instability.

Project coordinator

Madame Margherita Turconi (Astrophysique Relativiste, Théories, Expériences, Metrologie, Instrumentation, Signaux)

The author of this summary is the project coordinator, who is responsible for the content of this summary. The ANR declines any responsibility as for its contents.


ARTEMIS Astrophysique Relativiste, Théories, Expériences, Metrologie, Instrumentation, Signaux

Help of the ANR 330,309 euros
Beginning and duration of the scientific project: February 2022 - 36 Months

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